摘要
建立摩擦摆隔震桥梁简化力学模型,采用模态叠加法计算地震作用下的响应幅值。通过与SAP2000有限元实体模型仿真结果对比,研究简化力学模型的计算精度。结果表明:简化力学模型能够较为准确计算出隔震桥梁的响应幅值;El Centro地震波作用下,简化力学模型的分析结果基本能够满足工程精度要求;隔震桥梁主梁及桥墩地震响应分别以隔震模态、二阶模态为主。
Simplified mechanical model of FPB isolated bridges was established, the response amplitude was calculated used mode superposition method. The accttracy of results was verified by finite element simulation based on SAP2000. It was considered that the response amplitude agreed well with that of finite element simulation. Under the action of E1 Centro seismic wave, the results can meet engineering precision requirements basically. The response of girder and pier were mainly influenced by the isolated mode and second mode.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第5期800-805,共6页
Journal of Mechanical Strength
基金
中央高校基本科研业务费专项资金项目(2010ZT03)资助~~
关键词
隔震桥梁
摩擦摆
力学模型
动力学分析
有限元仿真
Isolated bridges
Friction pendulum bearing
Mechanical model
Dynamic analysis
Finite elementsimulation
