现浇楼板钢筋对梁端抗弯能力影响的数值分析
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摘要
为了研究实际钢筋混凝土(RC)框架结构中现浇楼板钢筋对梁端抗负弯矩能力的影响,采用有限元ABAQUS对一三层RC空间框架进行了数值仿真模拟,分析了结构在侧向荷载作用下的裂缝开展情况以及与梁肋平行的板筋沿着楼板宽度方向的应力分布情况。分析结果表明:现浇楼板在梁端抗弯能力中的参与作用对结构的屈服机制具有较大影响,现浇楼板的存在对框架梁端抗弯承载力有着显著的提高,在结构设计过程中应予以考虑。
In order to study the influence of monolithic slab in the actual flexural capacity of beam end in RC frame structures,a 3D,three-story RC frame structure subject to lateral load is simulated by the finite element software ABAQUS.The crack development and the distribution of slab reinforcement stress along slab width direction is investigated.The analysis results show that the failure mechanism of the frame structure is significantly effected by the participation degree of monolithic slab.The resistance to bending moment capacity on the beam ends is improved significantly by the monolithic slab.So the effect of the monolithic slab on the actual flexural capacity of beam end should be considered in frame structure design.
In order to study the influence of monolithic slab in the actual flexural capacity of beam end in RC frame structures,a 3D,three-story RC frame structure subject to lateral load is simulated by the finite element software ABAQUS.The crack development and the distribution of slab reinforcement stress along slab width direction is investigated.The analysis results show that the failure mechanism of the frame structure is significantly effected by the participation degree of monolithic slab.The resistance to bending moment capacity on the beam ends is improved significantly by the monolithic slab.So the effect of the monolithic slab on the actual flexural capacity of beam end should be considered in frame structure design.
引文
[1]王素裹,韩小雷,季静.现浇楼板对RC框架结构破坏形式的影响分析[J].土木建筑与环境工程,2009,31(1):66-71.
[2]杨小卫,王亚勇.考虑板筋参与梁端承载力贡献的设计方法及抗震性能研究[J].建筑科学,2011,27(7):11-16.
[3]宋吉荣,何世龙.现浇板钢筋对混凝土框架结构抗震影响分析[J].四川建筑科学研究,2010,36(5):55-57.
[4]中华人民共和国住房和城乡建设部.GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[5]王素裹.强震作用下现浇RC楼板对框架结构破坏形态影响的研究[D].广州:华南理工大学土木与交通学院,2009.
[6]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.
[7]霍林生,李宏男,肖诗云,等.汶川地震钢筋混凝土框架结构震害调查与启示[J].大连理工大学学报,2009,49(5):718-723.
[2]杨小卫,王亚勇.考虑板筋参与梁端承载力贡献的设计方法及抗震性能研究[J].建筑科学,2011,27(7):11-16.
[3]宋吉荣,何世龙.现浇板钢筋对混凝土框架结构抗震影响分析[J].四川建筑科学研究,2010,36(5):55-57.
[4]中华人民共和国住房和城乡建设部.GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[5]王素裹.强震作用下现浇RC楼板对框架结构破坏形态影响的研究[D].广州:华南理工大学土木与交通学院,2009.
[6]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.
[7]霍林生,李宏男,肖诗云,等.汶川地震钢筋混凝土框架结构震害调查与启示[J].大连理工大学学报,2009,49(5):718-723.
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