高烈度区独塔自锚式悬索桥纵向减震体系研究  

Study on Longitudinal Isolation System for Single-Tower Self-Anchored Suspension Bridge in High Intensity Zone

作　　者：庄鑫 ZHUANG Xin(Shanghai Urban Construction Design Research Institute Company Limited,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《工程建设与设计》2022年第7期3-6,共4页Construction & Design for Engineering

基　　金：高烈度区大跨径特殊斜拉桥抗震性能研究(科CK2017098A)。

摘　　要：为研究高烈度区独塔自锚式悬索桥纵向减震体系的减震行为,论文以兰州市某拟建黄河大桥为工程背景,研究了在纵桥向不同约束体系下桥梁结构的地震响应特点,分析了黏滞阻尼器的减震效果,并对阻尼器参数进行了优化分析。研究表明:对于地处高烈度区的独塔自锚式悬索桥来说,在塔梁之间设置纵向黏滞阻尼器是有效的减震体系;一般来说,阻尼系数越大,减震效果越好;与阻尼系数相比,阻尼器的速度指数对桥梁结构地震响应影响较小。In order to study the seismic behavior of the longitudinal isolation system of single-tower self-anchored suspension bridge in high intensity areas,a Yellow River Bridge in Lanzhou is taken as the prototype in this paper.Seismic response of the bridge under different constraint system was researched,vibration effect of viscous dampers was analyzed meanwhile.Moreover,the damper parameters was optimized in this paper.The results show that setting longitudinal viscous dampers between tower and beam is an effective isolation system for self-anchored suspension bridges in high intensity areas.The greater the damping coefficient,the better the vibration effect.Compared with the damping coefficient,the change of damper velocity index has little effect on the seismic response of bridge structure.

关 键 词：独塔自锚式悬索桥 纵向减震体系 黏滞阻尼器 参数优化 

分 类 号：TB21[一般工业技术—工程设计测绘] U44[建筑科学—桥梁与隧道工程]