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为了研究连柱支撑钢结构的抗震性能,对该结构进行了Pushover分析,并与K形偏心支撑钢结构进行了对比。分析了两组结构的塑性铰发展过程、顶点位移与基底剪力曲线、耗能段剪切变形及结构层剪力分布。分析结果表明:连柱支撑钢结构耗能段的塑性铰首先出现在结构的2~5层,最后整个结构的耗能段均进入塑性耗能,塑性铰分布合理,K形偏心支撑钢结构的塑性铰主要出现在结构下部,结构上部耗能段处在弹性阶段,耗能不够充分;达到控制加载位移时,连柱支撑钢结构仍可继续承载耗能,K形偏心支撑钢结构则不适于继续加载;Pushover加载过程中,连柱支撑钢结构层间位移角满足建筑抗震设计规范要求,K形偏心支撑钢结构层间位移角已超出要求;连柱支撑结构的耗能段转角除底层外,其余层耗能段的转角几乎相同,而K形偏心支撑钢结构耗能段转角沿层高方向相差较大。分析表明,连柱支撑钢结构抗震性能优于K形偏心支撑钢结构。
In order to study the seismic performance of the column-supported steel structure, Pushover analysis of the structure was carried out and compared with the K-shaped eccentric supported steel structure. The development of plastic hinge, the displacement of vertex and base shear, the shear deformation of energy dissipation zone and the shear distribution of structural layer are analyzed. The results show that the plastic hinges of the energy dissipation section with column-supported steel structure firstly appear on the 2nd to 5th floors of the structure, and finally the energy dissipation sections of the whole structure enter into the plastic energy dissipation and the plastic hinge distribution is reasonable. The K-shaped eccentric supporting steel structure The plastic hinges mainly appear in the lower part of the structure. The upper energy dissipating section of the structure is in the elastic phase and the energy consumption is not sufficient. When the load is controlled, the post-supporting steel structure can continue to carry the energy, while the K-shaped eccentric supporting steel structure is not suitable In the process of Pushover loading, the displacement angle of the steel structure between columns supported the columns meets the requirements of the Code for Seismic Design of Buildings, and the displacement angle between the K-shaped eccentric supported steel structures has exceeded the requirements. In addition to the bottom layer, , The rest of the energy-consuming segments of the corner is almost the same, and K-shaped eccentrically braced steel energy dissipating section corners along the height direction of a larger difference. The analysis shows that the seismic performance of the column-supported steel structure is better than that of the K-shaped eccentric supported steel structure.