中文摘要：

采用有限元方法对翼缘削弱型节点钢结构的抗震性能进行了研究,通过模态分析和动力时程分析,详细分析了框架的周期、结构动内力、动应力以及塑性变形区的发展规律等,并和普通节点框架的计算结果进行对比.研究结果表明：在小震下,翼缘削弱型节点的抗震性能并不理想,但在大震下,表现出了良好的抗震性能,塑性变形出现在梁端削弱处,塑性应变增加,柱底剪力和项层位移均比普通节点框架的小,建议在强震区推广使用翼缘削弱型节点.

英文摘要：

The seismic performance of steel frames with reduced beam section connections is evaluated by using the finite element analysis, the modal analysis and the time-history analysis. The vibration period, the dynamic internal force, the dynamic stress and the plastic deformation zone in steel frames are studied in detail; and the results are compared with those of steel frames with ordinary connections. It is shown that the seismic performances of the steel frames with reduced beam section connections are not very satisfactory under weak earthquakes, but they are very good under strong earthquakes, the plastic., deformation occurs at the reduced beam, the plastic strain increases, the column base shear and the top displacement of the steel frames are all smaller than those of the steel frames with ordinary connections, so it is suggested that reduced beam section connections should be used in areas with strong earthquakes.