高烈度区长联大跨连续梁减、隔震设计研究

发布时间：2018-03-22 17:46

本文选题：长联大跨连续梁　切入点：减隔震设计　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：长联大跨径连续梁桥上部结构的惯性力较大,传统延性抗震设计方法很难满足桥梁结构的抗震性能需求,减隔震设计是解决此类问题的有效方法。本文以潮安韩江特大桥主桥为工程实例,对其进行了减、隔震设计研究,主要从以下几个方面的开展了研究工作:(1)结合对桥梁抗震设计、计算方法的回顾,阐述了液体粘滞阻尼器、双曲面球型隔震支座、拉索减震支座的减隔震原理、适用条件以及在有限元软件ANSYS中的模拟方式。(2)以潮安韩江特大桥主桥为例,运用有限元程序ANSYS建立该桥的动力分析模型。动力分析模型的模拟应使结构的质量、刚度、及边界条件尽量与实际情况相符合。(3)根据潮安韩江特大桥主桥的特点,确定了该桥的减、隔震布置方案,采用非线性时程分析的方法计算了该桥减震前后的地震响应,分析比较了各减隔震装置的减震效果。(4)分析了粘滞阻尼器、双曲面球型隔震支座、拉索支座的主要设计参数对减震效果的影响,为一般长联大跨径连续梁桥的减隔震设计提供了一定的参考。(5)建立了可以将支座水平摩擦力与支座竖向动反力相耦合的支座计算模型,综合分析了竖向地震动强度对摩擦型减隔震装置(双曲面球型减震支座、拉索减震支座)的竖向动反力、滞回特性及桥梁结构地震响应的影响。
[Abstract]:The inertial force Talak long-span continuous girder bridge superstructure is larger, the traditional ductility design method is very difficult to meet the needs of the seismic performance of bridge structures, seismic design is an effective method to solve such problems. In this paper, the main bridge of Chaoan River Bridge as an example, on the line, the research of seismic isolation design, mainly from the following several aspects of the research work has been carried out: (1) according to the seismic design review, calculation method, describes the fluid viscous damper, double spherical bearings, bearing cable isolation principle, applicable conditions and simulation methods in finite element software ANSYS. (2) to the main bridge of Chaoan River Bridge as an example, using the finite element program ANSYS dynamic analysis model of the bridge. The dynamic analysis model should make the quality of the structure, stiffness and boundary conditions as far as possible in line with the actual situation. (3) according to the The characteristics of the main bridge of Chaoan Hanjiang Bridge, the bridge, the isolation arrangement, before and after the bridge seismic response calculation method of nonlinear time history analysis, the damping effect of the isolation device for comparative analysis. (4) analysis of the viscous damper, double spherical bearings, main influence the design parameters of the damping effect of the cable support, provides a reference for the design of seismic isolation general long span continuous bridge. (5) established can support horizontal friction and vertical dynamic bearing force coupling calculation model, a comprehensive analysis of the vertical seismic isolation strength of friction reduction device (double spherical bearing, cable damping bearing) vertical dynamic force, hysteretic characteristics and seismic response of bridge structures.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55

【相似文献】