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Study on Seismic Response Analysis Method of Engineering Site with Inclined Bedrock
Currently, there is not yet a good solution to rational and effective seismic response spectrum and ground motion of engineering site with inclined bedrock in engineering practice. Using numerical simulation method of decoupled near-field wave propagation, seismic response of engineering site with inclined bedrock, when δ pulse wave and artificial ground motion are inputted into this two-dimensional model, are analyzed and discussed. The results show that: (1) By the weighted average method of strong motion response spectrum of the left and the right in one-dimensional model, seismic response of engineering site with inclined bedrock can be approximately obtained; but, the coefficient factor α is gotten from "trial and error" and the adjustment for many times through the results of the two-dimensional model; (2) For SV wave seismic action, the seismic response results of the two-dimensional model have significant and obvious wave-type conversion phenomenon which cannot be solved in a one-dimensional model with SH wave as input; and (3) Soft soil characteristics of two-dimensional model sometimes reflect isolation effect, weakening effect and soft soil damping energy. In short, to solve this issue, the two-dimensional model (including tilt and inclined bedrock medium), rather than using the left and the right one-dimensional model, are recommended and suggested.
Study on Seismic Response Analysis Method of Engineering Site with Inclined Bedrock
Currently, there is not yet a good solution to rational and effective seismic response spectrum and ground motion of engineering site with inclined bedrock in engineering practice. Using numerical simulation method of decoupled near-field wave propagation, seismic response of engineering site with inclined bedrock, when δ pulse wave and artificial ground motion are inputted into this two-dimensional model, are analyzed and discussed. The results show that: (1) By the weighted average method of strong motion response spectrum of the left and the right in one-dimensional model, seismic response of engineering site with inclined bedrock can be approximately obtained; but, the coefficient factor α is gotten from "trial and error" and the adjustment for many times through the results of the two-dimensional model; (2) For SV wave seismic action, the seismic response results of the two-dimensional model have significant and obvious wave-type conversion phenomenon which cannot be solved in a one-dimensional model with SH wave as input; and (3) Soft soil characteristics of two-dimensional model sometimes reflect isolation effect, weakening effect and soft soil damping energy. In short, to solve this issue, the two-dimensional model (including tilt and inclined bedrock medium), rather than using the left and the right one-dimensional model, are recommended and suggested.
Study on Seismic Response Analysis Method of Engineering Site with Inclined Bedrock
Chen, X. L. (author) / Gao, M. T. (author) / Lu, H. S. (author)
Sixth China-Japan-US Trilateral Symposium on Lifeline Earthquake Engineering ; 2013 ; Chengdu, China
2013-12-11
Conference paper
Electronic Resource
English
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