| 基于屈服强度与支座分布影响的LRB隔震效果研究 |
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| 引用本文： | 马涌泉,陈水生. 基于屈服强度与支座分布影响的LRB隔震效果研究[J]. 西安理工大学学报, 2011, 0(3): 373-378 |
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| 作者姓名： | 马涌泉 陈水生 |
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| 作者单位： | 华东交通大学土木建筑学院; |
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| 基金项目： | 国家自然科学基金重点资助项目(50868007); 江西省自然科学基金重点资助项目(550012) |
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| 摘 要： | 以一座典型的三跨连续梁桥为工程背景,采用Bouc-Wen恢复力模型模拟铅芯橡胶支座(LRB)的力-位移非线性滞回特性,建立了LRB隔震与非隔震连续梁桥有限元模型,编制了运用Runge-Kutta迭代法和Newmark时间积分法联合求解全桥非线性运动方程的时程分析程序。利用程序并结合算例对影响隔震效果的LRB屈服强度与墩、台处LRB的分布等因素进行了分析。分析结果表明:增大LRB的屈服强度,可以显著抑制梁体的位移,但会导致LRB在其它关键部位隔震效果的下降;在桥墩处多布置LRB,会提高桥台剪力隔震率,但会导致LRB在除桥台剪力外的其它关键部位隔震效果的下降。
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| 关 键 词： | 连续梁桥 铅芯橡胶支座 隔震 地震响应 屈服强度 支座分布 |
Research on the Influence of Yield Strength and Bearings Distribution on Isolated Effectiveness of LRB |
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| MA Yongquan,CHEN Shuisheng. Research on the Influence of Yield Strength and Bearings Distribution on Isolated Effectiveness of LRB[J]. Journal of Xi'an University of Technology, 2011, 0(3): 373-378 |
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| Authors: | MA Yongquan CHEN Shuisheng |
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| Affiliation: | MA Yongquan,CHEN Shuisheng (School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China) |
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| Abstract: | With typical three-spans continuous girder bridges as the engineering background,the Bouc-Wen model is adopted to simulate the nonlinear hysteric characteristics of force-displacement relationship for LRB and FEA models for isolation and no-isolated continuous girder bridge are established.The time history analysis program is worked out using Runge-Kutta iterative method and Newmark time integration in combination to seek for solution to the nonlinear governing equation of motion of girder bridges.The progr... |
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| Keywords: | continuous girder bridges lead rubber bearings isolated seismic seismic responses yield strength bearings distribution |
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