大跨度斜拉桥顺桥向阻尼约束体系研究

发布时间：2018-06-15 03:37

本文选题：斜拉桥 + 半飘浮体系　；参考：《桥梁建设》2014年06期

【摘要】：为探讨E型钢阻尼器和液体粘滞阻尼器对大跨度斜拉桥的减震限位效果,以某(55+135+400+135+55)m半飘浮体系双塔斜拉桥为背景,设计2种阻尼约束减震体系方案。采用通用有限元程序SAP2000建立桥梁动力分析模型,通过参数分析确定较为合理的减隔震设计参数,选取3条人工地震波分析2种阻尼约束减震体系方案对该桥地震响应的影响规律。分析结果表明:选取的E型钢阻尼器和液体粘滞阻尼器均可有效控制地震作用中斜拉桥主梁的水平位移,采用液体粘滞阻尼器时塔底弯矩增幅相对较小,主梁水平位移控制效果相对较好。综合考虑减震限位效果及综合使用性能,在该斜拉桥中推荐使用液体粘滞阻尼器约束减震体系方案。
[Abstract]:In order to investigate the effect of E section steel damper and liquid viscous damper on the vibration reduction of long span cable-stayed bridge, two damp-constrained shock absorption systems were designed based on a 55 135 400 135 55 55 m semi-floating system double tower cable-stayed bridge. The bridge dynamic analysis model is established by using the universal finite element program SAP2000, and the reasonable design parameters of seismic isolation are determined through parameter analysis. Three artificial seismic waves were selected to analyze the effects of two damped damping systems on the seismic response of the bridge. The analysis results show that both the E-shaped steel damper and the liquid viscous damper can effectively control the horizontal displacement of the main girder of the cable-stayed bridge under seismic action, and the increase of the bottom bending moment of the cable-stayed bridge is relatively small when the liquid viscous damper is used. The control effect of horizontal displacement of main beam is relatively good. Considering the effect of vibration reduction and the performance of the cable-stayed bridge, it is recommended to use the liquid viscous damper to restrain the vibration absorption system in the cable-stayed bridge.
【作者单位】：山东省交通规划设计院;中国铁道科学研究院城市轨道交通中心;山东建筑大学土木工程学院;
【分类号】：U448.27;U441.3

【相似文献】