Appendices – Microsoft Excel Workbooks on http://extras.springer.com
The MS Excel spreadsheet format is used for maximum portability. Microsoft provides MS Excel Viewer free of charge at its Internet web site. The spreadsheets are kept as simple as possible. If MS Excel complains at the start about the security level of macros please click on Tools then Macro then Security and adjust the security level to at least medium. The spreadsheet must be exited and re-entered for the change made to take place. The spreadsheets are applicable to the vase studies and examples considered in this monograph.
1 Fast Fourier Transform, Filtering and Inverse Fast Fourier Transform
The work book is referred in Section 4.2.1.1. A work sheet from the work book is shown in Fig. 1
2 Polynomial Base Line Correction
The work book is referred in Section 4.3.1. A work sheet from the work book is shown in Fig. 2
3 Elastic Response Spectra of a Single Degree of Freedom Oscillator
The work book is referred in Section 4.4.3.1. A work sheet from the work book is shown in Fig. 3
4 Peak Particle Velocities from Piles Driving
The work book is referred in Section 7.2.1.2. A work sheet from the work book is shown in Fig. 4
M. Srbulov, Ground Vibration Engineering, Geotechnical, Geological, 203 and Earthquake Engineering 12, DOI 10.1007/978-90-481-9082-9, C Springer Science+Business Media B.V. 2010 204 Appendices Works sheet Inverse FFT of filtered record in the work book Appendix 1 Fig. 1 Appendices 205 Work sheet Base line corrected time series in the work book Appendix 2 Fig. 2 206 Appendices Work sheet Spectra in the work book Appendix 3 Fig. 3 Appendices 207 Work sheet H pile in the work book Appendix 4 Fig. 4 208 Appendices
5 Peak Particle Velocities from Vibratory Rollers
The work book is referred in Section 7.2.2.2. A work sheet from the work book is shown in Fig. 5
6 Vibration Properties of a Shallow Foundation for Compressor
The work book is referred in Section 7.4.2. A work sheet from the work book is shown in Fig. 6 Wolf (1994) described a discrete element model for coupled rocking and hori- zontal displacement of foundation of a three-cylinder compressor. The 2D discrete element model is shown in Fig. 7.52. Soil reaction to foundation movement is con- sidered in the horizontal direction and in rotation by elastic springs and dashpots. The elastic spring and dashpot with negative coefficients are artificial and are intro- duced by Wolf (1994). The two triangles under the foundation represent trapped soil beneath foundation for Poisson’s ratio greater than 1/3 (Wolf, 1994). The relationship for soil reaction moment contains a convolution integral in time. As an alternative to the recursive evaluation of the convolution integral, a physical discrete element model, which incorporates rigorously the convolution implicitly, is used according to Wolf (1994). The equation of the model rotational motion is:
¨ Kθ ˙ (ΔMθ + I) · θo + Kθ · θo − · (θo − θ ) + Cθ · θo − C · e ·˙uo − K · e · uo = M (1) 3 1 An additional internal rotational degree of freedom located within the foundation soil and connected by a rotational spring with a coefficient to the base and by a rota- tional dashpot with a coefficient to the rigid support, is introduced by Wolf (1994). Both the negative coefficients are artificial and are introduced by Wolf (1994) for mathematical reason.
Kθ ˙ − · (θ − θo) − Cθ · θ = 0(2) 3 1 1 The equation of the model translational motion is:
¨ m · (u¨o + e · θo) + C ·˙uo + K · uo = 0(3)
The symbols used in Equations (1), (2), and (3) are: ΔMθ is the trapped soil mass moment of inertia when soil Poisson’s ratio is greater than 1/3 (Equation 4), I is the foundation mass moment of inertia around the centre of gravity = Ð1 2 2 (12) × footing mass × (footing width + footing height ), θ o is the angle of foot- ing rotation, Kθ is the rotational static stiffness coefficient (Equation 5), θ 1 is an additional internal rotational degree of freedom, Cθ is the rotational dashpot coef- ficient (Equation 5), C is the translational dashpot coefficient (Equation 6), e is the distance between footing centre of gravity and its base, uo is the horizontal footing Appendices 209 Work sheet Rollers in the work book Appendix 5 Fig. 5 210 Appendices Work sheet Graphs in the work book Appendix 6 Fig. 6 Appendices 211 displacement, K is the translational static stiffness coefficient (Equation 6), M is the rotational moment around the footing centre of gravity, m is the footing mass,; dot and double dot above a variable represent the first and second derivative in time.