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| Study on steel strain-rate and multiple earthquake motions effect on elasto-plasticity responses of 300 m span single tower cable-stayed bridge |
| Received:September 26, 2012 Revised:October 18, 2013 |
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| DOI：10.7511/jslx201404012 |
| KeyWord:cable-stayed bridge MIDAS Civil2MARC MSC.MARC multi-point earthquake motion elasto-plasticity strain-rate |
| Author | Institution |
| 柳国环 |
天津大学 建筑工程学院, 天津 ;清华大学 土木工程系, 北京 |
| 陆新征 |
清华大学 土木工程系, 北京 |
| 国巍 |
中南大学 土木建筑学院, 长沙 |
| 李敏 |
大连海洋大学 海洋与土木工程学院, 大连 |
| 孙雪艳 |
北京金土木软件技术有限公司, 北京 |
| 吕伟荣 |
湖南科技大学 土木工程学院, 湘潭 |
| 全伟 |
铁道第三勘察设计院 桥梁处, 天津 |
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| Abstract: |
| Firstly, the 3D finite element model of single tower cable-stayed with a main span of 300 m is established using software MIDAS/Civil.A visual interface program named Civil2MARC for transforming the finite model from MIDASCivil to MSC.MARC is developed, and then the MIDAS model is transformed to MSC.MARC using the Civil2MARC.The consistency between the MIDAS and MARC finite model is compared to verify the accuracy of the interface program Civil2MARC.While, a visual program named MEMS_b is developed based on power spectra of ground is briefly introduced here.Further, the advantage of the displacement-velocity model is explicitly addressed, and the model is further applied to the cable-stayed bridge through the software MSC.MARC.Finally, to study the influence of multi-supported ground motions and material strain-rate on seismic response under earthquake motions, the subroutine considering strain-rate effect of steel and concrete is used to analyze the dynamic responses including weak parts, elasto-plastic response and so on.The results show that (1) The visual program Civil2MARC developed in this paper is characterized with convenient operation, stable running, high efficient transforming process and reliable transforming results.(2) The visual program MEMS_b developed in this paper has friendly user interface, flexible assignment and direct post-processing results display.(3) the displacement-velocity model is more reasonable and can be easily complemented through MSC.MARC.(4) The influence law strain-rate and multi-point earthquake motions effect on the plastic hinges occurrence location, time and final distribution of the cable-stayed bridge is analyzed and given.This paper involves theory model, program developing and engineering numerical computation, and can provide reference for revlevant engineering. |
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