考虑现浇混凝土板配筋影响框架梁柱中节点分析
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摘要
现浇楼板和框架梁一般具有良好的共同协调能力,楼板可显著提高框架梁的抗弯刚度和抗弯承载力。考虑楼板对框架梁抗弯刚度增大以后,在进行承载力设计时,研究板内与梁平行的板筋影响成为解决"强柱弱梁"问题的必要环节。通过采用ADINA软件对框架结构的中节点进行非线性分析,对比梁、板、柱受力钢筋的应力-应变关系,并深入研究现浇楼板对框架梁实际承载力产生"超强"影响方式,提出楼板有效翼缘宽度的取值,从而提出考虑板内纵筋影响的"强柱弱梁"的设计验算方法和合理建议。
The cast-in-situ floor and the frame-beams have the best coordinated ability,the floor can improve the beam bending stiffness and flexural strength significantly.The rectangular section beam is designed under the force after considering the bending stiffness from the floor,which underestimate the bearing capacity contribution,Therefore,studying the impact of the steel plate inside the board is a necessary link to solve "strong column weak beam" problem.Use the software ADINA to finish nonlinear analysis about the framework structure joints,and comparative the stress-strain relation between the steel stress of beam,plate and column,and research cast-in-situ floor produce "super" influence about the bearing capacity in the framework,and puts forward the effective flange width floor value,then puts forward the "strong column weak beam" design calculation method and reasonable suggestions with considering the longitudinal reinforcement inside the plate.
The cast-in-situ floor and the frame-beams have the best coordinated ability,the floor can improve the beam bending stiffness and flexural strength significantly.The rectangular section beam is designed under the force after considering the bending stiffness from the floor,which underestimate the bearing capacity contribution,Therefore,studying the impact of the steel plate inside the board is a necessary link to solve "strong column weak beam" problem.Use the software ADINA to finish nonlinear analysis about the framework structure joints,and comparative the stress-strain relation between the steel stress of beam,plate and column,and research cast-in-situ floor produce "super" influence about the bearing capacity in the framework,and puts forward the effective flange width floor value,then puts forward the "strong column weak beam" design calculation method and reasonable suggestions with considering the longitudinal reinforcement inside the plate.
引文
[1]苏幼坡,张玉敏,王绍杰,徐建新.从汶川地震看提高建筑结构抗倒塌能力的必要性和可行性[J].土木工程学报.2009.
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[5]岳戈,等.ADINA应用基础与实例详解[M].北京:人民交通出版社,2008.7.
[6]N.Yardimci,C.Yorgun,T.S.Arda.Tests on beam-column strong and weak axis connections[J].Computers&Structures,Volume 61,Issue 3,No-vember 1996:93-399.
[2]吴应雄,黄英.汶川地震灾害引发建筑结构设计的思考[J].福建建筑.2008(10):90-95.
[3]黄维,钱江,等.地震作用下框架结构“强梁弱柱”分析[J].低温建筑技术.2010(2):72-74.
[4]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989.
[5]岳戈,等.ADINA应用基础与实例详解[M].北京:人民交通出版社,2008.7.
[6]N.Yardimci,C.Yorgun,T.S.Arda.Tests on beam-column strong and weak axis connections[J].Computers&Structures,Volume 61,Issue 3,No-vember 1996:93-399.
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