双曲面摩擦摆支座典型桥梁的地震响应研究

发布时间：2018-01-19 10:35

本文关键词： 双曲面摩擦摆支座栓钉剪断地震响应非线性时程分析法桩土作用二期恒载　出处：《计算力学学报》2017年04期 　论文类型：期刊论文

【摘要】：为研究不同因素对粤东高烈度地区双曲面摩擦摆支座高速公路典型桥梁工程地震响应的影响,选取潮安韩江特大桥主桥(55+4×90+55)m为研究对象,该桥所有墩梁之间均采用双曲面摩擦摆支座。采用ANSYS有限元软件建立全桥模型,基于时程分析法研究了多种因素下桥梁结构的地震响应。研究表明,在纵桥向地震动激励下,桩土的相互作用对各桥墩墩底地震响应影响显著;栓钉全部剪断比栓钉全部不剪断的各桥墩墩底弯矩和剪力分布更均匀,桥墩上的固定支座栓钉不剪断将会增加该桥墩的弯矩、剪力以及支座剪力,但对其他桥墩的影响较小;该研究成果可应用于带栓钉的摩擦摆支座桥梁的地震响应分析。
[Abstract]:In order to study the influence of different factors on the seismic response of typical bridges of hyperboloid friction pendulum in high intensity area of eastern Guangdong. The main bridge of Chaoan Hanjiang River Bridge is 554 脳 9055m. The hyperboloid friction pendulum bearing is used among all piers and beams of the bridge. The model of the bridge is established by ANSYS finite element software. Based on time-history analysis, the seismic response of bridge structure under various factors is studied. The results show that the pile-soil interaction has a significant effect on the seismic response of pier bottom under longitudinal bridge ground motion excitation. The distribution of bending moment and shear force at the bottom of the pier is more uniform than that of all the piers not shearing by the bolt, and the non-shear force of the fixed bearing bolt on the pier will increase the bending moment, the shear force and the support shear force of the pier. But the influence on other piers is small; The results can be applied to the seismic response analysis of friction pendulum bearing bridge with studs.
【作者单位】：西南交通大学土木工程学院桥梁系;广东省南粤交通潮漳高速公路管理中心;
【基金】：广东省交通厅科技计划(科技-2014-02-015)资助项目
【分类号】：U442.55
【正文快照】： 1引言粤东地区处于我国五大地震带之一的华南地震区的东南沿海外带地震带,为IX度地震设防区域。位于粤东高烈度地区的潮安韩江特大桥主桥(55+4×90+55)m采用了双曲面摩擦摆减隔震支座,此类型支座由Zayas等[1]提出。由于该支座存在圆弧滑动面,故具有较强的自复位能力,并且该支

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