【摘要】 为研究巨型钢框架-拉索支撑结构体系中拉索预拉力和直径这两个参数对结构体系抗震性能的影响,获得拉索参数设计方法,对具有不同拉索参数的典型巨型钢框架-拉索支撑结构进行Pushover分析,考察不同拉索预拉力和直径对结构破坏模式、极限荷载、顶点位移、初始抗侧刚度、性能点处的基底剪力、相应顶点位移及最大层间位移角的影响。结果表明:拉索预应力对最大层间位移角有一定影响,对结构其他综合性能的影响可忽略;拉索直径增量不超过100%时,对结构的破坏模式影响较小,但拉索直径变化对结构的其他综合性能影响显著。更多还原

【Abstract】 To investigate the influence of two parameters of cable pretension and diameter,on the seismic behavior of a steel mega frame and cable-braced structure and obtain appropriate values of these two parameters,the Pushover analyses were made for typical steel mega frame and cable-braced structures with different pretensions and diameters of cables. It was examined the effects of different cable pretension and diameter on the failure modes,initial lateral stiffnesses,ultimate loads,top displacements and the base shears at performance points,and maximum inner-story drift angles of the structure,it could be found that the cable pretensions only have a limited impact on the maximum inner-story drift angle,and their influences on other comprehensive performance of the structure could be ignored,and the cable diameter had a small impact on the failure mode when its increment did not exceed 100%,but the cable diameter change had significant effect on the other comprehensive properties.更多还原