摘要
针对汶川地震中钢筋混凝土框架结构"强梁弱柱"式破坏模式展开研究,建立带楼板和无楼板结构空间有限元分析模型,通过非线性地震时程反应分析,说明现浇楼板对钢筋混凝土框架梁刚度以及梁端承载力的影响。算例分析表明,带楼板的框架结构,特别是板内配筋也参与受力的结构,框架梁承载力得到显著增强,梁端破坏程度降低,破坏时间延迟;在此基础上,探讨规范中框架梁设计时考虑楼板贡献作用相关条文的合理性。
This paper mainly studies on the 'Strong-Beam-Weak-Column' failure modes of RC frame structure in Wenchuan earthquake.According to the nonlinear time-history response analysis,finite element models with floors and without floors are established to illustrate the effect of the casting floor slabs on the stiffness and bearing capacity of beams.The results show that bearing capacity of beams of RC frame structures with floors,especially within the reinforcement,can be significantly enhanced and destruction of beams are delayed.Based on the results,it also discusses the rationality of some items considering the contribution of floor in the code.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第S1期169-172,共4页
China Civil Engineering Journal
基金
中央级公益性研究所基本科研业务费专项项目(2007A01)
国家重点基础研究发展计划(973计划)(2007CB714205)
关键词
现浇楼板
框架梁
刚度
承载力
casting floor slab
beams
stiffness
bearing capacity
