摘要
为明确IFA装置在不同梁长连续梁桥中的减震适用性,利用ANSYS建立有限元模型,进行非一致激励作用下不同跨度和不同跨数连续梁桥IFA装置减震的非线性时程分析,得到IFA装置减震效果及滑动墩地震响应的变化规律。研究表明,非一致激励作用下IFA装置在不同梁长连续梁桥中具有较强的减震适用性,连续梁桥跨度与跨数变化对其减震效果有所影响,影响效果与地震动视波速及连续梁桥梁型相关,为使不同连续梁桥中的IFA装置均能达到理想减震效果,需对其布设方案进行适当调整;非一致激励作用下布设IFA装置的连续梁桥各墩地震响应分配存在差异,连续梁桥跨度越大、跨数越多,各墩地震响应分配差异越明显。
In order to clarify the damping applicability of the IFA devices in continuous bridges with different lengths,the ANSYS is used to build finite element models,and nonlinear time-history analyses of the IFA devices in continuous bridges with different span and span number are carried out under non-uniform seismic excitations to confirm the rule of the change of the damping effect of the IFA devices and the seismic response of sliding-piers.The studies show that the IFA device has strong applicability for damping in continuous bridges with different length under non-uniform seismic excitations.The damping effect is affected by the span and the span number.The influential effect is related to the apparent wave velocity of the ground motion and the type of the continuous bridge.The layout scheme of the IFA device needs to be adjusted in order to achieve ideal damping effect in different continuous bridges.The seismic response distribution is different between the piers of the continuous bridge with IFA devices under non-uniform seismic excitations.The difference is more obvious when the span or the span number is greater.
作者
张茂江
陈士通
支墨墨
张文丽
许鑫祥
ZHANG Maojiang;CHEN Shitong;ZHI Momo;ZHANG Wenli;XU Xinxiang(Hebei Engineering Research Center for Traffic Emergency and Guarantee,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《铁道标准设计》
北大核心
2021年第4期94-99,共6页
Railway Standard Design
基金
国家自然科学基金项目(51678376,51778022)
国家重点研发计划项目(2016YFC0802207)。
关键词
连续梁桥
非一致激励
IFA装置
适用性
减震效果
地震响应
continuous bridge
non-uniform seismic excitations
damping
IFA device
applicability
seismic response
