从实际震害重新认识“强柱弱梁”

Understanding of strong column and weak beam from building damages in earthquake

"强柱弱梁"是基于承载能力设计的延性框架中的重要内容,但其作为框架结构的基本抗震手段和重要措施,却屡次在地震中不能充分发挥作用。通过Pushover非线性弹塑性分析手段,对多个框架结构进行抗倒塌分析,对比不同梁柱相对抗弯承载力控制对"强柱弱梁"的影响,并尝试采用在框架中加设部分翼墙或耗能支撑的手段替代对梁柱相对抗弯承载力控制,实现"强柱弱梁",达到提高框架抗倒塌能力的目的。

＂Strong column and weak beam＂ is the important conception in seismic design of frame structures.But as the basic character of RC frame structure,it didn＇t work effectively in many earthquake.Several RC frame structures were analyzed by Pushover method to compare the influence of different relative bending bearing capacity of the beam and column.Another method was suggested to avoid RC frame collapse with adding shorted shear-wall or energy dissipation brace to column to achieve ＂strong column and weak beam＂.