近断层地震作用下铁路桥梁减震卡榫原理及试验研究

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• 英文论文题名：Study on the Performance of Railway Bridge Structure With Shock Absorber System Under Near-Fault Ground Motions
• 论文作者：曾永平 ; 陈克坚 ; 樊启武 ; 陶奇
• 英文论文作者：Zeng Yongping ; Chen Kejian ; Fan Qiwu ; Tao Qi ; China Railway Eryuan Engineering Group Co.Ltd
• 年：2016
• 作者机构：中铁二院工程集团有限责任公司;
• 论文关键词：近断层地震动 ; 摩擦摆支座 ; 间隙金属阻尼器 ; 拟静力试验
• 英文论文关键词：near-fault ground motions ; FPS bearing ; innovative gap metal damper ; pseudo-static tests
• 会议召开时间：2016-10-14
• 会议录名称：“川藏铁路建设的挑战与对策”2016学术交流会论文集
• 语种：中文
• 分类号：U442.55
• 学会代码：ZGTD
• 会议名称：“川藏铁路建设的挑战与对策”2016学术交流会
• 会议地点：中国四川成都
• 主办单位：中国铁道学会、中国铁道学会工程分会、中国中铁股份有限公司、中铁二院工程集团有限责任公司
• 学会名称：中国铁道学会
• 页数：7
• 文件大小：790k
• 原文格式：O
• 会议级别：全国

摘要

为了探索有效限制纵向隔震桥梁在中小地震作用下的位移以及大震下不发生落梁和碰撞的方法,提出了由间隙金属阻尼器和摩擦摆式支座组成的组合隔震支座的解决方案。本文首先根据弹塑性力学理论,推导间隙金属阻尼器的屈服强度和屈服位移等参数理论计算公式,以多组拟静力试验结果为基础,识别、验证了滞回本构中相关参数及计算方法。通过整个桥梁体系的地震仿真计算和对安装间隙金属阻尼器的限位效果以及配合摩擦摆支座的桥梁近断层地震作用下减隔震效果的研究,可以得出间隙金属阻尼器在大震下不仅具备防落梁功能,而且耗能效果良好,中小震下可以有效限制主梁位移,为其推广应用提供了技术支持。
With extending the period of bridge system,FPS bearing is used to isolate seismic energy.Dued to low yielding strength,it is happened to large displacement and collision in decks,subjected to the near-fault ground motion with dominated long period and large pulse.In order to restrain the displacement of bridge deck under occasional and frequency earthquakes and prevent unseating in rare earthquakes,a composite bearing system which is combined by FPS and an Innovative gap metal damper had been approved here to yield strength for isolation bearings.With FEM simulation,topology optimization of hinge geometric shapchad been designed.Based on elastic-plastic mechanics theory,yield strength and yield displacement of gap metal damper are deduced.Through seismic simulation for railway bridge system,the results verified the design method is reasonable and proved the theory and test demonstration for the practice use of the composite bearings system and gap metal damper which can restrain the displacement of bridge deck under occasional and frequency earthquakes and prevent unseating in rare earthquakes.

引文

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