一种改进的刚性连接钢框架抗震性能研究

Research on Seismic Behavior of Steel Frams with Improved Rigid Connections

从结构整体工作性能的角度出发,对近年来工程界广为关注的狗骨式刚性连接钢框架进行了低周往复荷载作用下的试验研究。介绍了该类型结构的破坏形态、变形特点、荷载-位移滞回曲线、结构耗能性能、塑性铰出现的先后次序等,分析了狗骨式刚性连接钢框架的受力特点及抗震性能,验证了所采用设计方法的正确性。由此说明通过对靠近节点处梁翼缘的适当削弱,可以使得地震作用下塑性铰偏离脆弱的节点焊缝,出现在具有较大延性的梁端,以充分发挥钢材的塑性性能。为其在钢结构多层或小高层中的应用提供试验和理论依据。

From the overall behavior of the structure, an experiment research of a dog - bone connection steel frame under reversed cyclic loading was done in this paper, which is paid high attention by engineers, getting a knowledge of several characteristics of such frame, such as failure modes, deformation, loading-displacement reversed curve, energy consuming ability,the sequence of plastic hinge and so on, analyzing strength characteristics and the seismic behaviors, proving the correctness of the design method. As a result, through the proper cutting of the flange of the beam near the connection, the plastic hinge can be founded at the good ductile beam, offsetting the fragile welded connection and the plastic behavior of the steel can be made full used of. Thus experimental and theory basis is provided for its application in multi or small - high storeys structures.