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某十层的纯框架结构建筑检测结果表明,其弹性层间变形和弹塑性层间变形均不满足现行规范要求。采用防屈曲支撑对该结构进行了抗震加固设计,并基于SATWE软件分析了其小震下的结构性能。利用SAP2000软件,基于Pushover分析方法进行了抗震性能分析。由分析结果得知,防屈曲支撑增加了结构的抗侧刚度,增强了结构延性,改善了原结构薄弱层的抗震承载力。经防屈曲支撑加固后的结构,其变形特性仍与原框架结构类似。对实际工程所采用的防屈曲支撑进行了抗震性能抽检试验,结果表明,构件力学性能与设计数据吻合良好。防屈曲支撑技术用于高层框架结构的抗震加固具有良好的技术优势。
The test results of a ten-story pure frame structure building show that neither the elastic layer deformation nor the elastic-plastic layer deformation meet the current standard requirements. The anti-buckling brace is used to design the structure for seismic strengthening and the structural performance under minor earthquakes is analyzed based on SATWE software. Using SAP2000 software, the seismic performance analysis based on pushover analysis method was carried out. According to the analysis results, the buckling brace increases the lateral stiffness of the structure, enhances the structural ductility and improves the seismic capacity of the weak layer of the original structure. After the buckling support reinforcement structure, the deformation characteristics are still similar to the original frame structure. The anti-buckling brace used in the actual project was tested for the anti-seismic performance. The results show that the mechanical properties of the components are in good agreement with the design data. Anti-buckling support technology for high-rise frame structure of aseismic reinforcement has a good technical advantage.