DOCSLIB.ORG

Cable Bridge Conveyor, Llc

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Cable Bridge Conveyor, Llc YIJUN ZHANG, Ph.D, PE CABLE BRIDGE CONVEYOR, LLC. CONVEYOR DYNAMICS, INC. 1 CABLE BRIDGE CONVEYOR What Is It . Conventional trough or pipe conveyor supported by suspension bridge. The suspension bridge uses steel cables as main tension members to support loads. Span of 200m~600m between supports are typical; longer span is also possible depending on wind conditions. Suitable for crossing valleys, rivers, forests, structures and other difficult terrains, with minimal footprint and environmental impact. 2 CABLE BRIDGE CONVEYOR 3 CABLE BRIDGE CONVEYOR Conveyor on Suspension Bridge . Suspension bridges were built to support conveyors crossing Columbia river during hydropower dam construction in 1930s. 4 CABLE BRIDGE CONVEYOR Conveyor on Suspension Bridge . Similkameen ore conveyor bridge in BC, Canada, built in 1980. 404m span, 174m high truss tower; 1600 tph copper ore. 5 CABLE BRIDGE CONVEYOR RopeCon by DoppelMayr . Ropecon by DoppelMayr, a conveyor with a special flex wall belt. Instead of using idlers, Ropecon belt has fixed axles in belt with wheels moving on steel cables, 6 CABLE BRIDGE CONVEYOR Tacoma Narrow s Bridge . Old Tacoma Narrows Bridge is 850m long, 12m wide, steel girder construction, commissioned in 1940. 2nd order twisting motion at 0.2 Hz modal frequency, from wind vortex shedding. 7 CABLE BRIDGE CONVEYOR Limitation of Current Long Span Conveyor Solutions . Conventional suspension bridge requires high truss towers. Conventional suspension bridge uses arrow bridge deck that is close to the conveyor belt width. Weak torsional stiffness from narrow deck, prone to wind- induced dynamic instability. Ropecon from Doppelmayr is single-source supply and requires special belt, which is not compatible with conventional conveyor. Ropecon can’t accommodate horizontal curves. 8 CABLE BRIDGE CONVEYOR 9 CABLE BRIDGE CONVEYOR Improved Simple Suspension Bridge . Bridge decks are directly mounted on steel cables. Extended deck beam with stabilizing cables at the end. No high towers required. 10 CABLE BRIDGE CONVEYOR Improved Simple Suspension Bridge . Started in 1970s, now commonly used in hydropower dam construction to cross rivers. Long span, quick construction and low cost. Estimated >50 installations; longest span >400m 11 CABLE BRIDGE CONVEYOR Construction of Suspension Bridge 12 CABLE BRIDGE CONVEYOR London Millennium Bridge . The London Millennium Bridge uses a similar but not identical design. 13 CABLE BRIDGE CONVEYOR 14 CABLE BRIDGE CONVEYOR Cable Bridge Conveyor . Conventional trough or pipe conveyor is supported by simple suspension bridge. Conveyor belt line is in concave curve in the center, and convex curve near the support point. 15 CABLE BRIDGE CONVEYOR Cross Section View Stabilizing Cable Bridge Deck . Typical conveyor structure can be supported by the bridge 16 CABLE BRIDGE CONVEYOR Isotropic View . Conveyor structure is supported on deck beam. Deck beam supported by steel cables, with stabilizing cables at the two ends. 17 CABLE BRIDGE CONVEYOR Maintenance Vehicle Option Temporary walkway . Using modified ATV as maintenance vehicle to replace walkway can save structural cost and increase the efficiency of maintenance. Temporary walkway can be transported by the maintenance vehicle and installed on CBC if needed. 18 CABLE BRIDGE CONVEYOR Pipe Conveyor Option Temporary walkway . Tubular pipe conveyor with frame panel arrangement, is also compatible with Cable Bridge Conveyor 19 CABLE BRIDGE CONVEYOR Side View –Near Support Conveyor Belt line Bridge line . The conveyor belt line near support points is in convex curve. The convex curve is controlled by the leg height of the conveyor structure. The bridge cables can go over support with curve radius 35X ~ 40X cable diameter 20 CABLE BRIDGE CONVEYOR Side View –Center Conveyor Belt line Bridge line . The conveyor belt line in the center is concave curve, fitting closely to the bridge line. The arc lengths and radii of the convex and concave curve are related to the bridge line, which is also related to the span and sag. The belt radii are designed to control belt tension and safety factor. 21 CABLE BRIDGE CONVEYOR Versatility from Long Span . For CBC with 360m span and 40 sag ratio, transporting 2500T/H material, bridge structural weight is ~200kg/m or 134lb/ft. 22 CABLE BRIDGE CONVEYOR Finite Element Analysis . Finite Element Model is used to study displacement (left figure) and stress (right figure)in the bridge structure. 23 CABLE BRIDGE CONVEYOR Modal Analysis 2nd Mode Freq=0.55 1st Mode Freq=0.37 3rd Mode 4th Mode Freq=0.57 Freq=0.70 . Vibration Analysis is done to study the modal frequency of the bridge structure. Wind tunnel testing will be done during detail engineering stage. 24 CABLE BRIDGE CONVEYOR Summary . Cable Bridge Conveyor is a new type of bridge based, elevated, long span conveyor. Good solution for crossing rivers, valleys, structures. Minimal structural footprint to protect environment . The bridge design is a mature technology with >50 installations. Conventional trough and pipe conveyor can be used. Can accommodate horizontal curves. Licensing is available from Cable Bridge Conveyor, LLC. US and multinational patents pending. Overland conveyor design is available from Conveyor Dynamics, Inc. 25 Thank You CABLE BRIDGE CONVEYOR www.cablebridgeconveyor.com [email protected] 1-866-771-2258 26.
Load more

Recommended publications
  • BRIDGES // Construction and Materials BRIDGES
    Spanning the gap between BRIDGES // construction and materials BRIDGES Spanning the gap between construction and materials This folder of information cards and posters forms the resource for schools joining or renewing their membership of the Institute of Materials, Minerals and Mining Schools Affiliate Scheme in the 2009- 2010 academic year. It has been designed as a reference guide for teachers to link in with the materials, minerals and mining topics in the secondary science and technology curricula, though some sections will also be very relevant to geology and geography. This resource has been written by Dr Diane Aston, Education Co-ordinator and Mr Toby White, Education Co-ordinator (Minerals and Mining) from the Institute of Materials, Minerals and Mining. 1 THE DESIGNS History of Bridges http://static.panoramio.com/photos/original/301678.jpg THE HISTORY OF BRIDGES Over the centuries bridges have played an enormous and valuable part in bringing communities together and allowing easier trade routes to develop. They are portrayed in books and films as romantic spots where couples meet, or the middle ground where the final stand-off takes place. Bridges have evolved from simple logs across streams to massive and complex engineering structures and every few years another bridge comes along to beat records and sparks our imaginations. The very first bridges were built by Mother Nature and were the result of falling trees spanning streams or canyons. Man used these accidental crossings to reach new areas for settlement and new sources of food. The first man-made bridges copied this and were made from logs and then later stones.
    [Show full text]
  • Simplified Method of Determination of Natural-Vibration Frequencies Of
    Available online at www.sciencedirect.com Procedia Engineering 57 ( 2013 ) 343 – 352 11th International Conference on Modern Building Materials, Structures and Techniques, MBMST 2013 Simplified Method of Determination of Natural-Vibration Frequencies of Prestressed Suspension Bridge Vadims Goremikinsa,*, Karlis Rocensb, Dmitrijs Serdjuksc, Janis Sliserisd a,b,c,dInstitute of Structural Engineering and Reconstruction, Riga Technical University, Azenes Str. 16, LV-1048, Riga, Latvia Abstract A suspension bridge is the most suitable type for a long-span bridge. Increased kinematic displacements are the major disadvantage of suspension bridges. This problem can be solved by application of prestressed cable truss. Dynamic approach is one of regulated bridge design parts. Simplified determination method of natural-vibration frequencies of prestressed suspension structure and its experimental validation is presented in this paper. Natural-vibration frequencies and mode shapes of the model depending on the prestressing level were determined. It was experimentally proved, that mode shape with one half-wave does not appear for the model. The difference between results, which were calculated by the developed simplified determination method of natural-vibration frequencies of prestressed suspension structure and experimentally achieved by the model testing, does not exceed 20%. Therefore the method is applicable for preliminary dynamic analyses of structures. © 20132013 The The Authors. Authors. Published Published by Elsevier by Elsevier Ltd. Ltd. Selection and and peer-review peer-review under under responsibility responsibility of the ofVilnius the Vilnius Gediminas Gediminas Technical Technical University University. Keywords: mode shapes; cable truss; prestressing; natural frequencies. 1. Introduction Suspension bridges are structures where the deck is continuously supported by the stretched catenary cable [1].
    [Show full text]
  • Environmental Effects on a Suspension Bridge's Performance
    ENVIRONMENTAL EFFECTS ON A SUSPENSION BRIDGE’S PERFORMANCE Robert James Westgate July 2012 Department of Civil and Structural Engineering The University of Sheffield A thesis submitted for the Degree of Doctor of Philosophy in Engineering Environmental Effects on a Suspension Bridge’s Performance DECLARATION This thesis is submitted for the degree of Doctor of Philosophy in the Department of Civil and Structural Engineering at the University of Sheffield. The thesis is based on independent work performed by the Author between October 2008 and July 2012 under the supervision of Professor James M. W. Brownjohn. All the ideas and work are original except where referenced in the text and detailed in the “Division of work” sections of several chapters. The work contained in the thesis has not previously been submitted for any other qualification. Robert James Westgate July 2012 2 Environmental Effects on a Suspension Bridge’s Performance ABSTRACT Current Structural Health Monitoring (SHM) research uses changes in a bridge’s behaviour to locate and quantify the damage in a structure. However the structural responses are also linked to environmental effects, such as its temperature and the traffic load. In order to understand a typical suspension bridge’s behaviour to environmental conditions, studies on the Tamar Suspension Bridge’s response to temperature and traffic are contained in this thesis. This was achieved by observing data collected from long-term monitoring systems installed on the structure, and simulated responses derived from a three-dimensional finite element model of the bridge. The data of the bridge have shown that the profile of the suspension bridge reconfigures when the temperature of its structure increases, causing the deck to sag and expand.
    [Show full text]
  • Design of a Prestressed Concrete Stress Ribbon Bridge
    International Journal of Scientific & Engineering Research, Volume 6, Issue 12, December-2015 ISSN 2229-5518 307 Design of a Prestressed Concrete Stress Ribbon Bridge Aditya V. Jog1, D. M. Joshi2 1P.G. Student, Saraswati College of Engineering, Kharghar, Maharashtra, India. [email protected] 2Assistant Professor, Saraswati College of Engineering, Kharghar, Maharashtra, India. [email protected] have been constructed across the world. Few of the Abstract: A Stress Ribbon Bridge is a tension structure, which outstanding examples include bridges in Republic of has similar geometry to that of a simple suspension bridge. This type Czechoeslovaquia [1], Sacramento River, United States [2], of bridge is mainly used for pedestrian or cycling traffic. It is a Vltava River [3]. Though the existing literature on this slender structure, in which the suspended cables are embedded in subject is not very extensive, the most important the slab deck, following a catenary arc between the supports. The system is then prestressed using another set of tensioning cables to contributions concerning the analysis and design are those of provide flexural rigidity to the structure. This paper deals with the Prof. Jiri Strasky [4]. static behavior of stress ribbon bridges. The structural governing This paper deals with the statical behavior of the stress equations are studied and presented. The equations are then ribbon bridges. The structural governing equations are integrated for a particular case of a single span bridge, accounting studied and presented first. The equations are then integrated for various loading conditions and prestressing forces. An example for a particular case of single span bridge accounting for of the application is shown based on the presented formulation.
    [Show full text]
  • Water, Networks and Crossings Contents Contents
    WATER , NETWORKS AND CROSSINGS CONTENTS 3 Water, networks and crossings Contents Contents .............................................................................................................................................. 164 3.1 WATER BALANCE ............................................................................................................................ 166 3.1.1 Earth ....................................................................................................................................... 166 3.1.2 Evaporation and precipitation ................................................................................................. 167 3.1.3 Runoff ..................................................................................................................................... 169 3.1.4 Static balance ......................................................................................................................... 174 3.1.5 Movement ignoring resistance................................................................................................ 175 3.1.6 Resistance .............................................................................................................................. 178 3.1.7 Erosion and sedimentation ..................................................................................................... 184 3.1.8 Hydraulic geometry of stream channels ................................................................................. 186 3.1.9 River morphology...................................................................................................................
    [Show full text]
  • INTRODUCTION of CABLE STRUCTURES and THEIR REAL-LIFE EXAMPLES with SKETCHES Syed Nasir Abbas*1, Zain Imran, M
    Sci.Int.(Lahore),33(3),223-229,2021 ISSN 1013-5316;CODEN: SINTE 8 223 INTRODUCTION OF CABLE STRUCTURES AND THEIR REAL-LIFE EXAMPLES WITH SKETCHES Syed Nasir Abbas*1, Zain Imran, M. Ahsan khizar, Khuwailid Muneeb, Hassan Raza 1Departmenof Engineering Technology, College of Engineering and Technology, University of Sargodha, Sargodha, Pakistan * Corresponding Author, E-mail: [email protected] ABSTRACT: Cable structures are often used as final or partial intermediate structures in the construction stages of bridges like arch bridges or cable-stayed ones. These bridges are built often by cantilevering, i.e.with subsequent cantilever partial structures, which are cable-stayed too; hence, every construction stage is a cable structure to be analyzed. The methodology of structural analysis of these construction stages as well as the modeling of the structure for the determination of initial cable force is fundamental steps for establishing the actual state of stress and deformation. In the paper, a general methodology of analysis for construction sequences of cable-stayed structures is presented, which can be used both for the design of cable-stayed bridges and arch bridges. The proposed methodology is based on the simple analysis of multiple partial elastic schemes, which follow the actual construction sequence. The aim is that of obtaining a convenient final geometry through the control of deformations from the first stage to the last one, coincident with the service life configuration. Geometry and internal forces are contemporarily checked, as well as cable forces are determined without the need for too many stressing adjustments. Results of analyses, performed for different case studies, are reported, summarized, and commented, in order to show the reliability and the wide range of applicability of the proposed methodology of analysis.
    [Show full text]
  • Structures Lesson 4: Building Bridges – Part 1
    Science Unit: Structures Lesson 4: Building Bridges – Part 1 School year: 2008/2009 Developed for: Britannia Elementary School, Vancouver School District Developed by: Dr. Beth Snow (scientist), Lynne Turnau and Mary Anne Parker (teachers) Grade level: Presented to grades 3 and 4; appropriate for grades 3 – 7 with age appropriate modifications. Duration of lesson: 1 hour and 15 minutes Objectives 1. To learn about beam, truss, simple suspension, suspension, cantilever and arch bridges. 2. To build bridges. Background Information This is the fourth in a six-part series of lessons on “Structures.” Vocabulary Word: Brief definition. bridge a structure that spans a distance (such as a river or a road) to allow people or vehicles to pass over that distance bridge deck the part of the bridge that beams the load (i.e., the part you walk or drive over) pier support structures of a bridge truss the part of a structure that is build of straight bars arranged as a triangle; used to add support to a structure (See also below for different bridge types) Materials • cardboard • tape • Popsicle sticks • string • plasticine • worksheet • white glue In the Classroom Introductory Discussion 1. Review what the class has covered over the past three weeks. • We've learned about structures and fasteners and we've built towers. 2. Short description of other items to discuss or review. Structures_Lesson 4 1 SRP0125 Different types of bridges : • A beam bridge is a bridge made of a horizontal beam supported at each end by piers. The further apart the piers are, the weaker the bridge will be, so beam bridges are usually not more than 250 ft (76 m) long.
    [Show full text]
  • Design and Analysis of Stress Ribbon Bridges
    IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 DESIGN AND ANALYSIS OF STRESS RIBBON BRIDGES Siddhartha Ray1, D. M. Joshi2, Rahul Chandrashekar3 1M. E. student, Department of Civil Engineering, S. C. O.E., Kharghar, Maharashtra, India 2Assistant Professor., Department of Civil Engineering, S. C. O.E., Kharghar, Maharashtra, India 3Design Engineering, Precast, L & T Construction, Maharashtra, India Abstract A stressed ribbon bridge (also known as stress-ribbon bridge or catenary bridge) is primarily a structure under tension. The tension cables form the part of the deck which follows an inverted catenary between supports. The ribbon is stressed such that it is in compression, thereby increasing the rigidity of the structure where as a suspension spans tend to sway and bounce. Such bridges are typically made RCC structures with tension cables to support them. Such bridges are generally not designed for vehicular traffic but where it is essential, additional rigidity is essential to avoid the failure of the structure in bending. A stress ribbon bridge of 45 meter span is modelled and analyzed using ANSYS version 12. For simplicity in importing civil materials and civil cross sections, CivilFEM version 12 add-on of ANSYS was used. A 3D model of the whole structure was developed and analyzed and according to the analysis results, the design was performed manually. Keywords: Stress Ribbon, Precast Segments, Prestressing, Dynamic Analysis, Pedestrian Excitation. --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION Stress-ribbon bridge is the term that has been created to describe on which pedestrians can directly walk and is in the shape of an inverted arch.
    [Show full text]
  • Een Gids Door Het 'Authentieke'
    EEN GIDS DOOR HET ‘AUTHENTIEKE’ NEDERLAND HET GEBRUIK VAN HET BEGRIP ‘AUTHENTICITEIT’ IN NEDERLANDS- EN ENGELSTALIGE REISGIDSEN Anouk Pouwels S4484800 Masterscriptie ‘Tourism and Culture’ Radboud Universiteit Begeleider: Dr. Floris Meens 15 juni 2018 1 SAMENVATTING De authenticiteitsindustrie draait overuren, omdat in deze technologisch gemedieerde en gecommercialiseerde wereld steeds meer toeristen verlangen naar ‘authentieke’ en ‘echte’ ervaringen. Reisgidsen spelen een actieve rol in het sturen van toeristen bij het bevredigen van dit verlangen. Zo is het taalgebruik van de auteurs bepalend voor de manier waarop toeristen de desbetreffende locaties ervaren. Dit talige aspect van het begrip ‘authenticiteit’ blijkt echter onderbelicht te zijn de wetenschappelijke discussies. Dit onderzoek is dan ook uitgevoerd met het doel om meer kennis te verwerven wat betreft de manier waarop toeristen worden gestuurd door het taalgebruik in reisgidsen bij het bevredigen van hun verlangen naar ‘authenticiteit’. Hiervoor is de volgende onderzoeksvraag opgesteld: Hoe worden ‘authenticiteit’ en aanverwante begrippen gebruikt om locaties, objecten, producten, gedragingen, ondervindingen en individuen in Nederland te beschrijven in Nederlands- en Engelstalige reisgidsen gepubliceerd tussen het jaar 2002 en 2018? Om een antwoord te kunnen geven op deze onderzoeksvraag is een kwantitatieve en kwalitatieve discourseanalyse uitgevoerd. Hoewel ‘authenticiteit’ een belangrijk fenomeen is in de toeristenbranche en als zodanig wordt omschreven in de historiografie, blijkt uit het onderzoek dat de auteurs het begrip erg spaarzaam aangewend hebben, omdat het beschouwd wordt als een besmette term. Gezien het feit de aanverwante begrippen, daarentegen, met regelmaat worden toegepast, kan worden gesteld dat dit beladen begrip door de auteurs wordt omzeild door middel van het gebruik van verwante adjectieven.
    [Show full text]
  • FOOTBRIDGES a Manual for Construction at Community And
    FOOTBRIDGES A Manual for Construction at Community and District Level Prepared for the Department for International Development, UK. by I.T. Transport Ltd. Consultants in Transport for Development June 2004 CONTENTS PAGE Page No ACKNOWLEDGEMENTS (i) ABBREVIATIONS AND GLOSSARY OF TERMS (iii) 1. INTROUDCTION 1 2. FOOTBRIDGE SPECIFICATIONS 5 2.1 Planning 5 2.1.1 Location 5 2.1.2 Layout of the Footbridge 5 2.1.3 Height of Deck 6 2.2 Footbridge Users and Loading 8 2.2.1 Users 8 2.2.2 Design Loads 11 2.2.3 Design Criteria 13 3. SELECTING A FOOTBRIDGE DESIGN 15 3.1 Bamboo Bridges 16 3.1.1 Characteristics and Applications 16 3.1.2 Advantages and Disadvantages 16 3.1.3 Sources of Further Information 19 3.2 Timber Log Footbridges 20 3.2.1 Characteristics and Applications 20 3.2.2 Advantages and Disadvantages 20 3.2.3 Sources of Further Information 23 3.3 Sawn Timber Footbridges 24 3.3.1 Characteristics and Applications 24 3.3.2 Advantages and Disadvantages 25 3.3.3 Sources of Further Information 25 3.4 Steel Footbridges 30 3.4.1 Characteristics and Applications 30 3.4.2 Advantages and Disadvantages 31 3.4.3 Sources of Further Information 33 3.5 Reinforced Concrete (RCC) Bridges 34 3.5.1 Characteristics and Applications 34 3.5.2 Advantages and Disadvantages 34 3.5.3 Sources of Further Information 34 3.6 Suspension and Suspended Footbridges 36 3.6.1 Characteristics and Applications 36 3.6.2 Advantages and Disadvantages 36 3.6.3 Sources of Further Information 37 3.7 Selection of Type of Footbridge 41 3.7.1 Selection Criteria 41 3.7.2 Comparison of Footbridge Types Against Selection Criteria 43 3.7.3 Selection of Type of Footbridge 46 3.7.4 Recommended Selection Options 47 4.
    [Show full text]
  • Stress Ribbon Bridge
    www.studymafia.org A Seminar report On STRESS RIBBON BRIDGE Submitted in partial fulfillment of the requirement for the award of degree Of Civil SUBMITTED TO: SUBMITTED BY: www.studymafia.org www.studymafia.org www.studymafia.org Acknowledgement I would like to thank respected Mr…….. and Mr. ……..for giving me such a wonderful opportunity to expand my knowledge for my own branch and giving me guidelines to present a seminar report. It helped me a lot to realize of what we study for. Secondly, I would like to thank my parents who patiently helped me as i went through my work and helped to modify and eliminate some of the irrelevant or un-necessary stuffs. Thirdly, I would like to thank my friends who helped me to make my work more organized and well-stacked till the end. Next, I would thank Microsoft for developing such a wonderful tool like MS Word. It helped my work a lot to remain error-free. Last but clearly not the least, I would thank The Almighty for giving me strength to complete my report on time. www.studymafia.org Preface I have made this report file on the topic STRESS RIBBON BRIDGE; I have tried my best to elucidate all the relevant detail to the topic to be included in the report. While in the beginning I have tried to give a general view about this topic. My efforts and wholehearted co-corporation of each and everyone has ended on a successful note. I express my sincere gratitude to …………..who assisting me throughout the preparation of this topic.
    [Show full text]
  • Study on Suspension Bridge: Analysis and Construction Criteria
    ISSN: 2455-2631 © April 2017 IJSDR | Volume 2, Issue 4 Study on Suspension Bridge: Analysis and Construction criteria Gohel Pinkal1, Patel Sweta2, Pandey Vipul3, Guide Prof. Nikunj Patel4 1,2,3Research Scholars, 4Professor Department of Civil Engineering, Sardar Patel College of Engineering, Bakrol Abstract: A bridge is a structure built to span a valley, road, body of water, or other physical obstacle, for the purpose of providing passage over the obstacle.Nowadays suspension bridges are the pioneers in bridge technology.Of all the bridge types in use today, the suspension bridge allows for the longest span ranging from 2,000 to 7,000 feet.This type of bridge has cables suspended between towers & the cables support vertical suspendercables that carry the weight of the deck below. This arrangement allows the deck to be level or to arc upward for additional clearance.They are ideal for covering busy waterways. In this paper limitation, assumption analysis, how it can be constructing and loads acting on the bridge is described. Key words: Loads, suspension bridge, advantages, assumption, construction, types, history. I. INTRODUCTION Suspension bridge is a type of bridge that has a larger span than any other form of bridges. As it get larger span it become more flexible structure. Major bridges were still built using a truss design until 1808, when an American inventor named James Finley filed a patent on an early version of a suspension bridge. In most jurisdictions, there is a dearth of suspension bridges compared to other bridge types. A short history of suspension bridges which deals with the evolution of suspension bridge design also is included.
    [Show full text]