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偏心支撑框架结构体系是一种非常适合强震地区的抗震结构体系。D型偏心支撑钢框架结构是偏心支撑结构中常用的一种抗震耗能结构形式,其耗能梁段与柱直接相连,为了满足梁端抗弯承载力的设计要求和保证耗能梁段充分发展剪切塑性变形,一般需要对梁柱连接节点处采取一些加强措施。利用ANSYS有限元程序,针对传统节点比较分析了两种改良型梁柱连接节点的D型偏心支撑框架。分析结果表明,改良型节点的D型偏心支撑将耗能梁段外移不与柱直接相连,有良好的强度、刚度,不仅可以使剪切屈服的区域远离梁翼缘焊缝,而且可以放松钢柱对梁端部的变形约束,从而提高整个耗能梁段的耗能能力。
Eccentric support frame structure system is a very suitable earthquake strong earthquake seismic system. The D-type eccentric steel frame structure is a kind of seismic energy dissipation structure commonly used in eccentric support structure. The energy dissipation beam section is directly connected with the column. In order to meet the design requirements of flexural capacity of beam ends and to ensure the full development of energy dissipation beam sections Cut plastic deformation, the general need to connect the beam and column joints to take some measures to strengthen. Using ANSYS finite element program, the D-shaped eccentric support frame of two improved beam-column connection nodes is compared and analyzed for the traditional nodes. The results show that the D-shaped eccentric support of the modified node can move the energy dissipation beam segment out of direct connection with the column and has good strength and rigidity, which can not only make the region yielding away from the beam flange weld, but also relax the steel column Deformation constraints on the end of the beam, thereby increasing the energy consumption of the entire energy beam section.