【摘要】 以某带高位大跨钢桁架转换结构高层建筑为工程背景,进行了1/25缩尺比例的模型振动台试验,通过粘贴在钢桁架杆件上的应变片,测试了输入不同加速度峰值地震波作用下钢桁架的地震响应。在加速度峰值0.9g地震波作用下,两端支承钢桁架筒体剪力墙才出现裂缝,表明连接部位剪力墙受力性能较好;人工波作用下结构的地震响应最大,层地震作用力在钢桁架转换结构层有突变;试验中随模型结构裂缝发展和抗侧刚度衰减,层地震作用力分布发生变化,其中钢桁架转换结构层承担地震力相对减小,钢桁架应变反应也相对趋缓;钢桁架两端杆件受力较大,表明支承剪力墙对钢桁架的约束作用较大。更多还原

【Abstract】 Based on a shaking table experiment of 1∶25 scale frame-shearwall structure model with steel transfer trusses,the seismic responses of steel transfer trusses were studied under different peak accelerations of earthquake waves by the strain-gauge transducers stuck to some members of steel trusses.Some cracks appear on the shearwalls which are supported steel transfer trusses until the peak accelerations of the earthquake waves to reach 0.9 g,so the shearwalls are in good seismic performance.In the seismic responses caused by the artificial wave,site wave and El Centro wave,that caused by the artificial wave is the most intense one.Because steel transfer trusses are restrained by shearwalls,stresses of the members connecting to the shearwalls are large.更多还原