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| A three dimensional capacity spectrum method for plan-asymmetric structures |
| Received:May 06, 2009 Revised:December 10, 2009 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201101021 |
| KeyWord:rotational response capacity spectrum method nonlinear static analysis performance estimation modal pushover |
| Author | Institution |
| 李宁 |
天津大学建筑工程学院滨海土木工程结构与安全教育部重点实验室,天津 |
| 翟长海 |
哈尔滨工业大学 土木学院,哈尔滨 |
| 谢礼立 |
哈尔滨工业大学 土木学院,哈尔滨 ;中国地震局 工程力学研究所,哈尔滨 |
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| Abstract: |
| At present, the simplified methods for evaluating the structural performance are mostly based on the single degree of freedom system (SDOF), which is not adequate for the asymmetric structures considering the spatial coupled effects and the multi-dimensional ground motions. Considering the plan-asymmetric and coupled characteristics of structures, a modal equivalent triple-degrees of freedom (ETDOF) system is established. Then a three dimensional capacity spectrum method (3D-CSM) is developed based on the equivalent displacement rule. In order to verify the method, an asymmetric steel frame structure is applied with nonlinear time history analysis and 3D-CSM. The results show that the 3D-CSM is reliable and effective for evaluating the seismic response of plan-asymmetric structures. |