以实例分析绿色钢结构抗震性

Analysis on Seismic Resistance of Green Steel Structures With Examples

为了分析钢结构建筑的抗震性能,以一座35层框架支撑钢结构建筑为研究对象,利用PKPM软件建立模型,以时程分析法对整个地震持续时间中建筑实际产生的位移状况进行记录,以pushover分析法对地震时建筑中多种形状钢柱与混凝土组合方案的内力与变形情况进行分析.结果表明:地震作用下,不同楼层高度的建筑结构会在同一时间达到最大位移,且建筑结构随楼层高度增大,其整体刚度降低;相同加载条件下,建筑受力集中,变形增大,结构抗震性变差;所选取的钢结构的方钢管混凝土组合异形柱在4种加载模式下所得到的最大层间位移角均小于1/50,结构抗震性符合规范要求.

In order to analyze the seismic performance of a steel structure building,a 35-story frame-supported steel structure building was used as the research object,and a model was built using PKPM software.The actual displacement of the building during the entire earthquake duration was recorded by the time history analysis method.The internal force and deformation of various shapes of steel columns and concrete combination schemes in buildings during earthquakes were analyzed by pushover analysis method.The results show that under the action of an earthquake,building structures with different floor heights will reach the maximum displacement at the same time,and the overall stiffness of the building structure decreases with the increase of the floor height;under the same loading conditions,the building is stressed,the deformation increases,and the structure's seismic resistance deteriorates;the maximum interstory displacement angles of the selected steel structure concrete-filled square steel tube composite special-shaped columns under the four loading modes are all less than 1/50,and the seismic resistance of the structure meets the requirements of the code.