pcaSlab User’s Manual pcaSlab 1.10 CONCRETE SOFTWARE SOLUTIONS August 2004 Table of Contents Table of Contents 2 Legal and Contact Information 7 Copyright Information ..........................................................................................................7 Evaluation Software License Agreement ............................................................................8 Software License Agreement ............................................................................................14 PcaStructurePoint Contact Information .............................................................................20 Bug Report Form ...............................................................................................................20 Introduction to pcaSlab 23 Program Features..............................................................................................................23 Program Capacity..............................................................................................................23 System Requirements .......................................................................................................26 Terms and Conventions ....................................................................................................27 Ch. 1 Installing the Program 28 Running Program Installation ............................................................................................28 Purchasing and Licensing Process ...................................................................................35 Running the Program ........................................................................................................41 Removing the Program......................................................................................................41 Ch. 2 Method of Solution 42 Method of Solution.............................................................................................................42 Geometric Consistency Checks ........................................................................................42 Geometric Code Checks ...................................................................................................42 Slab Dimensions................................................................................................................42 Drop Panel Dimensions.....................................................................................................42 Column Capital Dimensions ..............................................................................................44 Minimum Slab Thickness of Flat Plate, Flat Slab and Beam-Supported Slab Systems ...45 Minimum Thickness for Waffle Slab Systems ...................................................................47 Waffle Rib Dimensions ......................................................................................................47 Special Considerations for Waffle Slabs ...........................................................................48 Material Properties ............................................................................................................50 The Equivalent Frame Method ..........................................................................................53 Stiffness Characteristics ....................................................................................................55 Loading..............................................................................................................................64 Self-Weight ........................................................................................................................64 Superimposed Loading......................................................................................................64 Lateral Loading..................................................................................................................64 Loading Patterns ...............................................................................................................65 Load Combinations............................................................................................................67 Column and Middle Strip Widths .......................................................................................68 Design Moments................................................................................................................72 Shear Analysis of Slabs.....................................................................................................75 Critical Section for Interior Supports of Interior Frames ....................................................78 Critical Section for Exterior Supports of Interior Frames...................................................79 Critical Section for Interior Supports of Exterior Frames...................................................79 Critical Section for Exterior Supports of Exterior Frames..................................................80 Computation of Allowable Shear Stress at Critical Section...............................................81 Computation of Factored Shear Force at Critical Section.................................................82 Computation of Unbalanced Moment at Critical Section...................................................82 2 Computation of Shear Stresses at Critical Section ...........................................................82 Shear Resistance at Corner Columns...............................................................................84 Shear Analysis of Longitudinal Beams..............................................................................84 Area of Reinforcement.......................................................................................................87 Reinforcement Selection ...................................................................................................90 Additional Reinforcement at Support.................................................................................94 Integrity Reinforcement .....................................................................................................95 Corner Reinforcement .......................................................................................................95 Deflection Calculation........................................................................................................95 Cracking.............................................................................................................................97 Deflection Computations .................................................................................................100 Material Quantities...........................................................................................................101 Ch. 3 User Interface Description 102 User Interface Components.............................................................................................102 Check Boxes .............................................................................................................102 Checked Menu Commands ......................................................................................102 Command Buttons ....................................................................................................103 Control Menu.............................................................................................................104 Dialog Boxes .............................................................................................................104 Drop-down List..........................................................................................................105 Drop-down Menu.......................................................................................................106 Enable/Disable Options ............................................................................................106 Frame Boxes.............................................................................................................107 List Boxes..................................................................................................................108 Option Buttons ..........................................................................................................110 Pop-up Menu.............................................................................................................111 Tabs ..........................................................................................................................112 Text Boxes ................................................................................................................113 Main Window ...................................................................................................................114 Main Window.............................................................................................................114 Title Bar.....................................................................................................................114 Menu Line .................................................................................................................115 Tool Bar.....................................................................................................................115 View Windows...........................................................................................................116 Status Bar .................................................................................................................117