【作者】 刘筠；

【导师】 毕继红； 尹元彪；

【作者基本信息】 天津大学 ， 建筑与土木工程， 2012， 硕士

【摘要】 矩形水池是由顶盖、池壁及底板等矩形薄板组成的空间箱形结构,受荷情况较为复杂,并且水池相邻池壁、底板与池壁、底板与地基之间等存在着相互约束作用。对于贮液结构来说,裂缝控制的要求一般较高,因此在计算内力和变形时,一般假设材料是正交各向异性的匀质连续弹性体,而忽略混凝土材料的非匀质性、塑性和裂缝的影响,在设计矩形水池时,采用弹性薄板理论进行计算。本文检索了目前水池研究的相关知识,详细介绍了国内外水池模型及其抗震设计的研究现状,针对某矩形沉淀池工程,采用大型有限元分析软件TDAP,对该沉淀池在静水压力、多遇地震和罕遇地震作用下的抗震性能进行分析研究:(1)采用文克尔弹性地基模型考虑土与结构的动力相互作用,详细介绍了弹簧刚度的计算方法;(2)地震作用下,将池内液体作为附加质量作用于水池结构,以此考虑池内液体对结构抗震性能的影响。多遇地震作用下采用静的解析方法,罕遇地震作用下采用动力时程分析法,运用延性设计理论对罕遇地震作用下的结构内力和变形能力进行诊断;(3)对结构进行动力时程分析时,根据重复反射理论提出一种由典型地震波和土层波阻抗计算场地设计地震波的方法,这种方法计算出的地表面地震波能较好地考虑局部场地效应,一定程度上减小地震烈度异常现象。本文对矩形水池抗震设计的研究思路与方法为今后该领域的研究提供一种较为实用的参考方法。更多还原

【Abstract】 The rectangle pool is a space box-frame structure. It consists of the roof、walls、the floor and other rectangular laminas. The load case is relatively complex. And the adjacent walls、floor and the walls、floor and the foundation has a mutual restraint. Because the liquid storage structures require to control the crack strictly, when calculating the stress and deformation, it is necessary to ignore the non-uniformity of the concrete material、plasticity and the fracture effect. In the design of a rectangular pool, assume that the structure is orthotropic、continuous and elastomeric. generally use the theory of elastic thin-plate to calculate.the thesis retrieved the current relevant knowledge of the pool, introduced the domestic and international pool model and seismic design in details. it took a rectangular pool for example, used large-scale finite element analysis software TDAP, The paper analysed the performance of the pool under static loads、level one seismic and the level two seismic :(1) adopted the winkler elastic foundation model in consideration of soil-structure dynamic interaction, introduced the method to calculate the spring stiffness in detail; (2) under the action of earthquake, to consider the performance of the pool under the interaction of the liquid and the structure, the liquid is added on basin structure as the mass. the static analytical method was used to analyse the level one earthquake,and the time-history analysis method was used to calculate the performance under the level two earthquake, when check the stress and the deformation under the level two earquake of the structure, the theory of ductility design was uesd; (3) during the dynamic time-history analysis, based on the repeated reflection theory, a method of inversing seismic wave on the ground was suggested in this paper. It is according to the typical seismic waves and the impedance of the site soil. this method took local site effects better into account, reduced the phenomenon of abnormal intensity to some degrees. The ideas and methods in the thesis provided a practical approach in this field to design for reference.更多还原