基于抗震性能分析的贮液池的改建加固研究

根据能量定则,采用静态分析中的震度法,基于Midas软件建立有限元模型,考虑土对结构的约束作用,依据Ⅱ型Level2地震动的设计震度计算结构由于地震动产生的惯性力,探讨地震波入射方向、水浮力及池内水位对结构地震响应的影响,在此基础上提出去掉柱子和顶板,并在纵轴方向加钢筋混凝土板的改建方案。新方案进行抗震性能分析时,考虑全满、左空右满和左满右空3种不同的工况,得到左空右满为最不利的地震响应工况后,与原结构内力进行对比,得出依据抗震性能对结构进行改建是合理的结论。根据截面法对改建结构进行加固补强,使得不符合规范要求的贮液池得到重新利用,减少资源浪费。

The reconstruction and reinforcement study of reservoir based on seismic performance analysis

With the application of the seismic degree method which is a kind of static analysis and the energy criterion,the structural and geological modeling were made in consideration of the soil constraint function based on Midas software.The seismic design of type Ⅱ Level 2 seismic degree was used to calculate the inertia force caused by seism and investigate the influence of the direction of seismic wave,the water floatage and the pool water level on the earthquake response.All researches are the foundations of the reconstruction program which remove the pillars and roof and add reinforced concrete slab in the longitudinal axis direction.Through the analysis of the earthquake seismic performance about the new program in consideration of three conditions which are full,right-full and left-full,the most unfavorable response can be abtained.Compared with the original structure,the results show that it is reasonable to reconstruct the structure based on the seismic performance analysis.According to the section method to reinforce the rebuild structure,the reservoir used to deviate from standards can be reused,which reduce the waste of resources.