摘要
"强柱弱梁"破坏机制是我国抗震规范对框架结构在地震作用下要实现的理想破坏模式,而在汶川地震中大多数带现浇板框架结构的破坏模式为"强梁弱柱"。因此应当重视对带现浇板框架结构形成的"强柱弱梁"的破坏机制的研究。介绍了《建筑抗震设计规范》中有关"强柱弱梁"的规定及其存在的问题,分析现浇板对框架"强柱弱梁"屈服机制的影响并对相应的研究成果进行了分析评述,并探讨了该类问题的研究方向。
＂Strong column-weak beam＂ is the ideal failure mode for frame structures,which is recommended by Chinese Specifications.Most of the RC frames with cast in-situ slabs were damaged due to column plastic hinges during Wenchuan earthquake.The ＂strong column-weak beam＂ yield mechanism is questioned.Firstly,the insurance methods of ＂strong column-weak beam＂ in ＂Code for seismic design of buildings＂ and its weak points are introduced in this paper,the slab affection of ＂strong column-weak beam＂ is analyzed then,the results of existing researches on ＂strong beam-weak column＂ are summarized,the defects of the researches are deeply analyzed and the prospect of this problem is discussed at last.
出处
《结构工程师》
2010年第6期121-127,共7页
Structural Engineers
基金
国家科技支撑计划(2006BAJ03A07-04)
关键词
现浇板框架
强柱弱梁
弯矩增大系数
有效翼缘宽度
双向地震力
RC frame with casting in-situ slab
strong column-weak beam
moment amplification factor
effect slab width
bidirectional earthquake force
