【摘要】 采用Pushover分析方法,从底部剪力、破坏模式和抗震性能方面,研究在两种典型水平荷载模式下,预应力巨型支撑-钢框架结构的非线性性能.结果表明:结构在均布荷载模式下的极限荷载比倒三角模式下的大;两种水平荷载模式下,结构破坏模式相似,首先是下部楼层梁屈服,当较多水平梁屈服后柱出现屈服,极限状态时拉索才会出现屈服;经过抗风抗震弹性设计的预应力巨型支撑-钢框架结构,弹塑性抗震性能满足规范要求.更多还原

【Abstract】 Pushover analysis is applied to study the nonlinear performance of the pre-stress-mega-braced steel frame structure in aspects of base shear,failure mode and seismic performance under two typical horizontal load modes. Results show that structural ultimate load under uniformly distributed load is bigger than that under inverted triangular horizontal load. Structural failure modes are similar under two horizontal loads: First,beams of the lower part yield; then columns start to yield when there are more beams yield,and only when the structure is in the ultimate state,do cables begin to yield. After wind-resistant and aseismic elastic design,elasto-plastic seismic performance of the pre-stressed mega bracing-steel frame structure meets Chinese code requirements.更多还原