高速公路收费站改扩建项目的建筑抗震加固分析与设计

Analysis and Design of Earthquake Resistant Reinforcement for Expressway Toll Station Reconstruction and Expansion Project

基于重庆某高速公路收费站改扩建项目,对其抗震加固进行了分析和设计,运用抗震理论和时程分析法对网架结构进行抗震性能分析,并提出一些加固改造的建议。在加固后,建立该收费站网架整体空间计算模型,对该网架结构进行地震分析,通过加载EL-Centro波对结构在多遇地震下抗震性能进行分析比较,研究在多遇地震地震作用下结构杆件内力的变化。分析表明,在2.15 s和2.24 s处,杆件多数出现应力峰值。变形最大的杆件272结构最大应力为214.5 MPa,小于材料屈服强度235.5 MPa,结构达到7°的抗震要求。

Based on the reconstruction and expansion project of a toll station in Chongqing,this paper analyzes and designs its aseismatic reinforcement,and applies seismic theory and time history analysis method to analyze the seismic performance of the grid structure,and puts forward some suggestions for reinforcement and reconstruction. In the reinforcement,establish the calculation model of toll station grid overall space,the seismic analysis of the grid structure,through comparative analysis of the structure under frequent seismic performance under earthquake loading on EL-Centro wave changes in the frequent earthquake seismic structure under the action of internal force of bar. The analysis shows that most of the stress peaks appear at 2. 15 s and 2. 24 s. The maximum stress of the 272 structure with the maximum deformation is 214. 5 MPa,less than the material yield strength 235. 5 MPa,and the structure reaches 7° of seismic requirement.