The Anti-Seismic Analysis Of An Existing Rectangular Pool

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.