基于TDAP软件的既有水管桥抗震性能分析

发布时间：2018-01-04 06:03

本文关键词：基于TDAP软件的既有水管桥抗震性能分析　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着人们对建筑物地震灾害影响因素的分析和研究,世界各国的桥梁抗震理论得到快速的发展。对于震害较多的日本来说,不断积累经验,修订和完善建筑物的抗震设计理论,是保护人民生命财产的重要手段。既有的建筑物是按照原有设计规范制定的,随着规范的不断修订,既有建筑物是否能够满足现行规范的抗震要求已经是现在研究的重要课题,本文便是在此背景下,对既有的水管桥是否满足现行规范的抗震性能要求进行研究。目前虽然对桥梁的抗震性能分析已经很多,但是对于具有特殊用途的桥梁的分析则较少。本文针对某已经建成的一座用于运输水源的桥梁(水管桥)进行抗震性能分析。水管桥的物理性质、荷载情况以及地震影响等方面都与传统桥梁有很大不同。首先建立水管桥的梁单元模型,根据材料以及位置的不同,分别对梁单元设置线性和非线性的本构关系;其次将动水压力转换成附加密度加在相应的单元上,由于箱型桥面内水的影响,水管桥桥轴向与桥直向振动时的质量不同,因此对此桥的桥轴与桥直向分别进行模态分析;然后根据模态分析结果确定主振型、频率、瑞利阻尼,并对模型桥轴和桥直向进行时程分析,重点分析桥面的位移以及桥墩的内力;最后根据时程分析结果,对原有水管桥的桥墩进行安全性能检查。本文研究成果为今后此类桥梁的设计及施工提供理论参考。
[Abstract]:With the analysis and study of the influence factors of earthquake disaster in buildings, the seismic theory of bridges in the world has been developed rapidly. For Japan, which has more earthquake damage, it has accumulated more experience. Revising and perfecting the aseismic design theory of buildings is an important means to protect people's life and property. Existing buildings are formulated according to the original design code, with the continuous revision of the code. Whether the existing buildings can meet the seismic requirements of the current code has become an important topic in the present research. This paper is based on this background. Whether the existing aqueduct bridge meets the seismic performance requirements of the current code has been studied. Although the seismic performance of the bridge has been analyzed a lot. However, the analysis of the bridge with special purpose is less. This paper analyzes the seismic behavior of a bridge (water pipe bridge) which has been built for transporting water. The physical properties of the water pipe bridge are also discussed in this paper. The load and earthquake effect are very different from the traditional bridge. Firstly, the beam element model of the water pipe bridge is established, according to the different materials and positions. The linear and nonlinear constitutive relations are established for the beam element respectively. Secondly, the dynamic water pressure is converted into additional density and added to the corresponding unit. Due to the influence of the water in the box deck, the axial vibration of the water pipe bridge is different from that of the straight vibration of the bridge. Therefore, the modal analysis of the bridge axis and the straight direction of the bridge is carried out respectively. Then according to the modal analysis results, the main vibration mode, frequency, Rayleigh damping are determined, and the model bridge axis and bridge straight direction are analyzed in time history, and the displacement of the bridge deck and the internal force of the pier are analyzed emphatically. Finally, according to the results of time-history analysis, the safety performance of the piers of the original watermain bridge is checked. The research results in this paper provide a theoretical reference for the design and construction of this kind of bridges in the future.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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