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| A simplified method for seismic response analysis of site with circular diaphragm wall |
| Received:May 19, 2010 Revised:September 02, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20116014 |
| KeyWord:simplification computational method load decomposition seismic response circular diaphragm wall |
| Author | Institution |
| 张如林 |
同济大学 土木工程防灾国家重点实验室, 上海 |
| 楼梦麟 |
同济大学 土木工程防灾国家重点实验室, 上海 |
| 赵昕 |
同济大学 建筑设计研究院, 上海 |
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| Abstract: |
| First, the horizontal seismic loads were expanded into the Fourier series in the circumferential direction. Considering the orthogonality between the normal and tangential direction on the circumference, the horizontal seismic loads were then transformed into combination of uniform distributed lateral loadings. In this way, the simplified solving method was proposed for the three-dimensional problem reduced to a series of two-dimensional problems. The equivalent linearity method was used to deal with soil nonlinearity, so the nonlinear seismic problem was transformed into linear problem. The practicability and reliability of the simplified method were verified by comparison between the results of simplified model and 3-D model. The results show that the model size is reduced and the computational efficiency is greatly improved by the proposed method. Finally, simplified method was used to analyze the seismic response of foundation site with super large diameter circular diaphragm wall. Compare with the results of the site without wall, the peak acceleration of the pit bottom is increased owing to the confinement effect of wall, and the influence to ground surface far from the wall is very little. |
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