【作者】 陈浩；

【导师】 雷宏刚；

【作者基本信息】 太原理工大学 ， 建筑与土木工程， 2012， 硕士

【摘要】 我国地域辽阔,但水资源的分布是很不均匀的.为了调节水资源而造福于人类,实施水资源的跨地区、跨流域的输送,国家计划实施南水北调计划工程,在南水北调工程中需要修建大量的渡槽,这些渡槽所建地区大部分位于地震烈度为七度及以上区域,有的还在地震高发区;因此这些渡槽的抗震设计,对整个南水北调工程的安全和经济运行有着至关重要的影响。本文以南水北调运城引黄西杜村工程为背景,采用上承式钢管与钢管混凝土复合拱结构作为支撑结构。根据结构构件的单元模拟,通过有限元软件MIDAS建立结构的空间整体模型,运用力学知识对模型结构的整体性能进行分析：1)分析渡槽内水位为空水位、设计水位和满水位时,三种不同荷载工况下结构的位移和应力,得到渡槽结构的静力性能及变化图形。2)对渡槽结构整体进行模态分析,得到有限元模型前20阶自振特性及相应的振型特征。3)反应谱及时程分析,采用振型分解反应谱法针对三种不同荷载工况进行动力反应谱分析,然后输入Taft波对渡槽结构进行地震动力时程分析。4)得到静、动力分析数据,对渡槽进行稳定计算。通过以上分析,得到渡槽整体的最不利荷载工况、位移最大处、最大弯矩、最大轴向应力及其薄弱环节,为以后相似工程做个参考。更多还原

【Abstract】 China has a territory, but the distribution of water resource is very uneven. In order to regulate water resource and bring benefit to mankind, our nation is planning a South-to-North water diversion project in which many aqueducts are needed. The seismic intensity of areas in which the aqueducts are constructed is more than7degree. Some of the areas are in high seismic zone. Therefore, the seismic design of aqueducts has essential effect on safety and economic operation of South-to-North water diversion project.This article is against the background of south-to-north water diversion Yuncheng pulling-huang Xishe Village project, using deck steel pipe and concrete filled steel tube composite arch structure as a support structure. According to unit simulation of the structural elements, using the finite element software MIDAS to establish the structural overall model, to analyze the structural overall performance through the calculation of the spatial mechanical model:1) To analyze the structural deformation, displacement and force of three different operating conditions, to access static performance of the aqueduct structure.2) Dynamic analysis of the aqueduct structure:modal analysis, to list the top20order natural vibration characteristics and corresponding vibration mode characteristics of the finite element model;3) Response spectrum analysis, to analyze vibration modal decomposition response spectrum method from three different operating conditions,time history analysis, inputting the Taft wave, time history analysis of earthquake dynamics to the aqueduct structure.4) To stably calculate the aqueduct, based on static and dynamic analysis results.The ultimate load condition, maximum displacement, maximum bending moment, maximum axial stress and weak links were obtained by analysis above and provide reference for later similar projects.更多还原