现浇楼板配筋对框架梁端承载力贡献
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摘要
"强柱弱梁"是框架结构抗震设计中不可忽视的重要内容,也是实现梁铰机制的重要结构措施,但是要达到这种良好的梁铰机制,现浇楼板配筋的影响最为重要,不仅增大了框架梁的刚度,而且对框架梁的极限承载力有不可忽略的贡献。同时与美国规范ACI318-02相比,我国对现浇楼板的研究不充分。通过采用ADINA软件对框架结构的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,并以框架中节点为例核算节点的强柱弱梁配筋情况,从而提出考虑板内纵筋影响的"强柱弱梁"的设计验算方法。
"Strong column weak beam" is the noticeable important content under the framework structure seismic design,also is the realization of the beam hinge mechanism structure,but which is an important measures to this good beam hinge mechanism,the casting of the slab reinforcement effect is most important,not only increase the stiffness of the frame beams,and the ultimate bearing capacity of frame beams have a kind of not ignorable contributions.At the same time,compared with the American standard ACI318-02,the research is not full about the floor in the china.This article is about the nonlinear analysis on the node of the frame structure through ADINA software,compare with the stress-strain relation of the reinforcement in the beam,plate,column,and in-depth research on the cast-in-situ floor that produce "super" influence about bearing capacity in the framework,and puts forward effective way floor flange width,and with the values of the nodes for example accounting node of the strong weak beam columns in the framework,and then puts forward the design calculation method considering the impact of the longitudinal reinforcement to "strong column weak beam" in the plate.
"Strong column weak beam" is the noticeable important content under the framework structure seismic design,also is the realization of the beam hinge mechanism structure,but which is an important measures to this good beam hinge mechanism,the casting of the slab reinforcement effect is most important,not only increase the stiffness of the frame beams,and the ultimate bearing capacity of frame beams have a kind of not ignorable contributions.At the same time,compared with the American standard ACI318-02,the research is not full about the floor in the china.This article is about the nonlinear analysis on the node of the frame structure through ADINA software,compare with the stress-strain relation of the reinforcement in the beam,plate,column,and in-depth research on the cast-in-situ floor that produce "super" influence about bearing capacity in the framework,and puts forward effective way floor flange width,and with the values of the nodes for example accounting node of the strong weak beam columns in the framework,and then puts forward the design calculation method considering the impact of the longitudinal reinforcement to "strong column weak beam" in the plate.
引文
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[3]M.R.Ehsani and J.K.Wight.Effect of Transverse Beams and Slab on Behavior of Reinforced Concrete Beam-to-Column Connections[J].ACIStructural Journal,1985.
[4]江见鲸,陆新征,叶列平著.混凝土结构有限元分析[M].北京:清华大学出版社,2005.3.
[5]高佐人,马千里.现浇楼板对框架结构柱梁强度比的影响研究[J].山西建筑,2009.6.
[6]王玉霞,周婷,江吉兵.钢筋混凝土框架结构梁柱节点性能的研究[J].工程结构,2008.12.
[7]王素裹,韩小雷等.现浇楼板对框架梁受力影响的研究[J].华南地震,2009.6.
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