Ground Motion of Non-circular Alluvial Valley for Incident Plane SH-wave
The seismic ground motions are studied in an infinite half-space with a non-circular alluvial valley under time harmonic incident anti-plane shear waves. Based on the conformal mapping method and Fourier series expansions, the conditions of displacement continuity and stress equilibrium at the interface of alluvial valley are set as semi-circular alluvial valley in conformal plane, then the result is obtained by constructing a set of infinite linear algebraic equations with boundary discretization. The unknown coefficients in the algebraic system can be easily determined. The present method is treated as a semianalytical solution since error only attributes to the truncation of Fourier series. Earthquake analysis for the site response of alluvial valley or canyon subject to the incident SH-wave is the main concern. Numerical examples for semi-elliptic alluvial valley are given to test our program. The research indicates that great interaction exists between the alluvial valley and the horizontal surface, which will bring on great influence on ground motion. Therefore enough importance must be attached to the existing of subsurface cavity while finishing seismic design.
Ground motion SH-waves Non-circular Alluvial Valley Conformal Mapping Method.
Hui Qi Gen Chang Zhang Jing Fu Nan
Civil Engineering College, Harbin Engineering University, Harbin 150001, China
国际会议
上海
英文
2092-2097
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）