Chapter
Dec 27, 2013
Study on Seismic Response Analysis Method of Engineering Site with Inclined Bedrock
Authors: X. L. Chen [email protected], M. T. Gao, and H. S. LuAuthor Affiliations
Publication: International Efforts in Lifeline Earthquake Engineering
Abstract
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.
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Copyright
© 2014 American Society of Civil Engineers.
History
Published online: Dec 27, 2013
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ASCE Technical Topics:
- Bedrock
- Continuum mechanics
- Dynamics (solid mechanics)
- Earthquake engineering
- Engineering fundamentals
- Engineering mechanics
- Errors (statistics)
- Geology
- Geotechnical engineering
- Geotechnical investigation
- Ground motion
- Mathematics
- Models (by type)
- Rocks
- Seismic tests
- Seismic waves
- Site investigation
- Solid mechanics
- Statistics
- Tests (by type)
- Two-dimensional models
- Waves (mechanics)
Authors
Affiliations
Division of Engineering Seismology and Urban Disaster Mitigation, Institute of Geophysics, China Earthquake Administration, P.O. Box 100081, Beijing, China. E-mail: [email protected]
M. T. Gao
Division of Engineering Seismology and Urban Disaster Mitigation, Institute of Geophysics, China Earthquake Administration, P.O. Box 100081, Beijing, China. E-mail: [email protected]
H. S. Lu
Division of Engineering Seismology and Urban Disaster Mitigation, Institute of Geophysics, China Earthquake Administration, P.O. Box 100081, Beijing, China. E-mail: [email protected]
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