螺栓装配多高层钢结构梁柱连接抗震性能研究

对三个不同参数螺栓连接的多高层钢结构装配节点的抗震性能进行试验和有限元分析，获得以梁端荷载-位移表征的滞回曲线、骨架曲线、延性性能、转动能力、刚度退化曲线等，分析了法兰螺栓和盖板螺栓对试件受力性能的影响。试验和有限元分析结果表明：通过调整盖板螺栓数量和规格，可以实现梁柱刚性连接和变刚度连接，变刚度连接时，可实现多遇地震作用下不滑移，设防地震和罕遇地震作用下利用盖板与梁翼缘相对滑移耗散地震能量；通过分析螺栓接触面的滑移，认为盖板与梁翼缘滑移构造提高了梁端的变形能力，延性以及耗能能力，实现了摩擦耗能，可以用于抗震设防区结构中。

Seismic performance of beam-column connection in boltedassembled multi-high-rise steel structure

To study the seismic performance of bolted beam-column connection in bolted assembled multi-high-rise steel structures, three bolted beam-column connections with different parameters were studied through tests and finite element analysis (FEA). The seismic performance such as hysteretic curves, skeleton curves, ductility, rotation capacity and stiffness degradation curves were obtained, and the impact of cover plate bolts and flange bolts on key mechanical property of the connections were analyzed. The result indicates that the rigid and variable stiffness beam-column connections can be achieved by adjusting the number or size of bolts on cover plate. Thus, the variable stiffness connection do not slip in frequent earthquake, while the cover plate and beam flange slip past each other in medium and strong earthquakes, dissipating energy by slip. The slipping characteristics were obtained. The slipping between cover plate and beam flange can increase deformability, ductility, energy dissipation of the connection, and the energy is dissipated by slip, which can be used in the structure in seismic regions.