摘要
为了寻找现浇钢筋混凝土框架结构在实际震害中出现的与"强柱弱梁"设计准则相悖的"强梁弱柱"破坏现象产生的原因,并深入研究现浇楼板对框架梁实际承载力产生"超强"影响的方式,采用ABAQUS对钢筋混凝土带楼板框架和空框架结构进行了侧向力作用下的非线性有限元模拟。通过对比塑性铰出现顺序、钢筋的应力应变变化、框架梁端曲率变化和考察带楼板框架中楼板钢筋的应力变化情况,提出楼板有效翼缘宽度的取值应考虑横向梁刚度和侧向位移等因素的影响。
In order to find out the cause of disagreement between the damage form of ＂strong beam weak column＂ in actual earthquake disasters and the designing principle of ＂ strong column weak beam＂, a finite element program ABAQUS is used in this paper to simulate reinforced concrete structure models with and without floor system respectively. The two models are simulated throughout elastic, elastoplastic and totally plastic stages and the influence of cast- in-place slab in the over-strength of main beams is thoroughly analyzed. The developing sequence of the plastic hinges, the stress-strain curves, and the curvature of main beams are compared. In addition, the slab reinforcement stress development of the frame with slab is studied. A recommendation is put forward that the torsional stiffness of transverse beams and lateral interstory drift should be taken into consideration in the decision of effective flange width.
出处
《华南地震》
2009年第2期35-41,共7页
South China Journal of Seismology
基金
华南理工大学亚热带建筑科学国家重点实验室开放基金资助项目(2008KA01)
关键词
框架结构
现浇楼板
强柱弱梁
超强
有效翼缘宽度
Frame
Slab
Strong column weak beam
Over-strength
Effective flange width
