山区非等高三塔斜拉桥纵向抗震约束体系研究
发布时间：2018-08-01 15:53
【摘要】：为确定山区非等高三塔斜拉桥合理的纵向抗震约束体系,以平塘特大桥为研究背景,采用非线性时程分析法进行研究。基于结构纵向地震反应,通过对比不同约束体系在地震作用下的响应,选取较为合理的纵向约束体系;通过在两边塔处设置液体黏滞阻尼器来减小结构的地震响应,并进行液体黏滞阻尼器参数敏感性分析,选取较为合理的阻尼器参数;在此基础上,通过对存在塔高差异的两边塔采用不同参数的液体黏滞阻尼器,进一步优化结构受力和位移。研究结果表明:在两边塔处设置液体黏滞阻尼器可以显著减小纵向地震作用下结构的内力和位移;通过两边塔采用不同参数的液体黏滞阻尼器,可以使三主塔所受内力均较小,且边塔可以更好地分担中塔受力。
[Abstract]:In order to determine the reasonable longitudinal seismic restraint system of non-iso-tall three-tower cable-stayed bridge in mountainous area, a nonlinear time-history analysis method was used to study the Pingtang Bridge. Based on the longitudinal seismic response of the structure, the more reasonable longitudinal restraint system is selected by comparing the responses of different constrained systems under the earthquake, and the seismic response of the structure is reduced by setting liquid viscous dampers at the two sides of the tower. On the basis of analyzing the sensitivity of liquid viscous damper parameters and selecting more reasonable damper parameters, the liquid viscous damper with different parameters is applied to both sides of tower with different tower height. Further optimize the stress and displacement of the structure. The results show that the internal force and displacement of the structure under longitudinal earthquake can be significantly reduced by setting liquid viscous damper at the two sides of the tower, and the internal force of the three main towers can be reduced by using the liquid viscous damper with different parameters on both sides of the tower. And the side tower can better share the force of the middle tower.
【作者单位】： 贵州省交通规划勘察设计研究院股份有限公司;中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：中南大学创新驱动计划资助项目(2015CX006) 国家自然科学基金资助项目(51308549)
【分类号】：U442.55;U448.27
本文编号：2158075
[Abstract]:In order to determine the reasonable longitudinal seismic restraint system of non-iso-tall three-tower cable-stayed bridge in mountainous area, a nonlinear time-history analysis method was used to study the Pingtang Bridge. Based on the longitudinal seismic response of the structure, the more reasonable longitudinal restraint system is selected by comparing the responses of different constrained systems under the earthquake, and the seismic response of the structure is reduced by setting liquid viscous dampers at the two sides of the tower. On the basis of analyzing the sensitivity of liquid viscous damper parameters and selecting more reasonable damper parameters, the liquid viscous damper with different parameters is applied to both sides of tower with different tower height. Further optimize the stress and displacement of the structure. The results show that the internal force and displacement of the structure under longitudinal earthquake can be significantly reduced by setting liquid viscous damper at the two sides of the tower, and the internal force of the three main towers can be reduced by using the liquid viscous damper with different parameters on both sides of the tower. And the side tower can better share the force of the middle tower.
【作者单位】： 贵州省交通规划勘察设计研究院股份有限公司;中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：中南大学创新驱动计划资助项目(2015CX006) 国家自然科学基金资助项目(51308549)
【分类号】：U442.55;U448.27
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