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| 基于功率谱法分析场地效应对大跨度连续刚构桥的影响 | |
| 引用本文： | 熊欢,张犇,魏陆垚,王子健.基于功率谱法分析场地效应对大跨度连续刚构桥的影响[J].重庆交通大学学报(自然科学版),2011,30(4):712-716. |
| 作者姓名： | 熊欢 张犇 魏陆垚 王子健 |
| 作者单位： | 1. 中铁二院武汉勘察设计研究院有限责任公司,湖北武汉,430071 2. 重庆市市政设施管理局,重庆,401147 3. 重庆交通大学土木建筑学院,重庆,400074 |
| 基金项目： | 国家自然科学基金项目(50879097) |
| 摘 要： | 以一座全长为346 m的预应力混凝土连续刚构桥为基础,建立全桥计算模型,采用由规范反应谱生成的相应的功率谱,分6种工况对桥梁进行激励；通过多点激励与一致激励的对比,分析了场地效应对连续刚构桥的影响.结果表明:对于高墩大跨度连续刚构桥,场地效应主要对跨中截面不利,并使桥墩墩底内力产生突变. |
| 关 键 词： | 反应谱 功率谱 场地效应 多点激励 |
Influence on Long-span Continuous Rigid Framed Bridge of Site Effect Based on Power Spectrum Method |
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| XIONG Huan,ZHANG Ben,WEI Lu-yao,WANG Zi-jian.Influence on Long-span Continuous Rigid Framed Bridge of Site Effect Based on Power Spectrum Method[J].Journal of Chongqing Jiaotong University,2011,30(4):712-716. | |
| Authors: | XIONG Huan ZHANG Ben WEI Lu-yao WANG Zi-jian |
| Institution: | 1.Wuhan Survey and Design Institute Co.,Ltd.of CREEC,Wuhan 430071,Hubei,China; 2.Chongqing Municipal Inprastructure Administrafion Bureau,Chongqing 401147,China; 3.School of Civil Engineering and Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
| Abstract: | A computing model of the entire bridge was established based on a prestressed concrete continuous rigid framed bridge,which was 346m.The bridge was to be excited under six working conditions respectively using the power spectrum generated from standard response spectrum.By compared multi-support excitation with uniform excitation,this essay analyses the influence of site effect on continuous rigid framed bridge.The research result indicates that for continuous rigid framed bridge of high piers and long span,site effect is mainly disadvantageous to the mid-span cross-section of girders,and can cause a abrupt change of internal force of the bottom of piers. |
| Keywords: | response spectrum power spectrum site effect multi-support excitation |
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