钢框架内填正交胶合木剪力墙结构的抗震性能

Seismic performances of cross laminated timber infilled steel moment frame structures

为了研究用粘钢节点连接的钢框架内填正交胶合木(CLT)剪力墙体系在地震荷载作用下的抗震性能,本文对一榀纯钢框架和一榀钢框架内填CLT剪力墙的缩尺构件分别开展低周反复荷载试验,探明两种结构的破坏形态和破坏机制,并对试验现象、抗侧承载力、抗侧刚度和耗能性能等进行全面分析。试验结果表明:通过采用CLT墙体与钢框架在角部连接的方式,钢框架和CLT剪力墙实现了协同工作,整个混合结构的受力也更加合理,同时也具有良好的延性;此外,相比于纯钢框架,钢框架内填CLT剪力墙结构抗侧刚度更高,其抗侧承载力和耗能能力也有很大提高。

To investigate the seismic performance of cross laminated timber(CLT)panel infilled steel moment frame structures with hybrid bonded steel joints,the two specimens with reduced scale were tested under reversed cyclic loads till to fail.One of the two specimens was bare steel moment frame and the other one was CLT panel infilled steel moment frame.Failure modes and failure mechanisms were discussed,and the lateral bearing capacity,lateral stiffness and energy dissipation were analyzed.Results showed that steel moment frame and CLT shear wall could work well together by connecting two parts at the CLT corners.The structural mechanism of the whole hybrid structure was more reasonable and had a good ductility.Compared with bare steel frame,the hybrid structure had a higher lateral stiffness,lateral bearing capacity and energy dissipation capacity.