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Experimental study of hollow rectangular bridge column performance under vertical and cyclically bilateral loads

ISSN号：1671-3664
期刊名称：《地震工程与工程振动：英文版》
时间：0
分类：U443.4[建筑科学—桥梁与隧道工程;交通运输工程—道路与铁道工程]
作者机构：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040, [2]辽宁省交通规划设计院,辽宁沈阳110166
相关基金：国家自然科学基金项目（50908005,51178008）;美国加州交通局项目

作者： Han Qiang[1], Du Xiuli[1], Yihui Zhou[2], George C. Lee[2]

关键词：桥梁工程, 铰接构造, 框架式, OPENSEES, 时程分析, 地震反应, bridge engineering, hinge, frame-style, OpenSees, time history analysis, seismic response

中文摘要：

该文针对框架式曲线梁桥铰接构造的地震反应进行分析研究,以美国强震带的一实际桥梁为例,通过Open Sees平台建立全桥三维模型并精细模拟铰接点的咬合构造和限位装置,采用时程分析获得铰接构造内的易损伤位置、损伤过程及地震激励角度对铰接点地震反应的影响。研究结果表明：框架式曲线梁桥铰接构造内的纵向限位钢筋,横向受压支撑垫是抗震薄弱构件;铰接构造内纵向限位钢筋的锚固区混凝土以及咬合位置受拉区混凝土在地震中容易产生开裂破坏;非对称框架式曲线梁桥不同铰接点地震反应相差很大,墩高对称布置会令该差值减小;纵桥向地震激励下,铰接点纵向限位装置损伤较大,咬合区域竖向地震反应较大,但这一地震激励会均化不同铰接点处横向限位装置的损伤程度;横桥向地震激励下,铰接点横向限位装置损伤较大,咬合区域横向地震反应较大,但这一地震激励会均化不同铰接点处纵向限位装置的损伤程度。

英文摘要：

In order to study the seismic response of hinge in frame-style curved girder bridge, a 3D model of actual bridge in high seismic region in American is established in OpenSees. Time history analysis is performed to study the seismic response of hinge and the impact of earthquake excitation angle on seismic response. The results show that longitudinal restrained steels and transverse compressive pads are seismic fragile components. Concrete located at the anchor zone of longitudinal restrained steels and the tensile zone of occlusal area in hinge is liable to crack. Different hinges in unsymmetrical bridge have significantly different seismic responses, though the difference is small in symmetrical bridge. Longitudinal excitation generates serious damage of longitudinal restrained devices and large vertical response of occlusal area, but it can homogenize damage of transverse restrained devices in different hinges. Transverse excitation generates serious damage of transverse restrained devices and large transverse response of occlusal area, but it can also homogenize the damage of longitudinal restrained devices in different hinges.

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