新型梁柱节点高层钢结构抗震性能研究

STUDIES ON THE ASEISMIC PERFORMANCE OF HIGH RISE STEEL STRUCTURES WITH NEW BEAM-COLUMN JOINTS DISSIPATING SEISMIC ENERGY

结构的抗震设计一般有两类途径:主动控制和被动控制。主动控制系统复杂且成本偏高,普通的被动控制抗震结构强震后修复困难。针对上述问题,本文提出了一种新型转动摩擦耗能梁-柱节点,并基于SAP2000对采用新型梁柱耗能节点的X形支撑钢框架体系和普通X形支撑钢框架体系进行了罕遇地震作用下的时程分析,结果表明采用了该新型梁-柱耗能节点的X形支撑钢框架体系具有更好的抗震性能。

Seismic design of structures generally adopts active or passive control. Active control sys- tems are complex and expensive, while, commonly used passive control systems are difficult to repair after severe seismic actions. This paper presents a new-type beam-column joint dissipating seismic energy via the friction between its different components with relative rotation, then the new beam-column joint is integrat- ed into a high-rise steel structural model with X-shape bracing systems, and this model is analyzed by u- sing the engineering software SAP2000. Comparison between the displacement time-history curves of X- shape braced steel frames with/without new beam-column joints demonstrates that the X-shape braced frame with new beam-column joints has much better performance in resisting severe seismic actions.