叠合梁受弯性能试验研究*
- 摘 要
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王磊1，2，彭笑川1，2（1 桂林理工大学土木与建筑工程学院， 桂林 541004；2广西建筑新能源与节能重点实验室， 桂林 541004）［摘要］为了解叠合混凝土梁的力学性能，对6根受拉区新增受力钢筋叠合梁进行了试验研究，探讨了受拉区新增受力钢筋叠合梁的裂缝、挠度的发展变化规律，极限抗弯承载力以及破坏形态。试验研究表明，叠合层强度高一级别的叠合构件基本性能与整体浇筑梁相近，其裂缝条数较多、宽度较大，但并不能明显提高钢筋混凝土梁的屈服弯矩和极限弯矩。［关键词］叠合梁； 受弯性能； 裂缝； 抗弯承载力中图分类号：TU375.1 文献标识码：A 文章编号：1002-848X(2013)08-0051-03Experimental study on the bearing capacity of reinforced concrete composite beamsWang Lei1,2, Peng Xiaochuan1,2（1 College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China; 2 Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin 541004, China）Abstract: In order to study the behavior of the bearing capacity of reinforced concrete composite beams, six composite beams with added renforced steel at tension zone were tested. The main experiment parameters include deflection, crack, ultimate bearing capacity and failure mode. The results show that the behavior of high strength composite layer beams is similar to that of the whole cast beam, the number of cracks is more and the space is larger, but can not improve the yield moment and ultimate moment of the reinforced concrete beam obviously.Keywords: composite beam; bearing capacity; crack; ultimate bearing capacity*广西自然基金“2012GXNSFBA053151”，广西重点实验室开放基金项目（11-03-21-3），广西科技攻关项目（桂科攻0992001-2）。参考文献［1］BASS ROBERT A, JIRSA JAMES O. Shear transfer across new and existing concrete interfaces［J］. ACI Structural Journal, 1989, 86(4): 383-393.［2］刘艳萌.新旧混凝土粘结技术研究［D］.重庆:重庆大学,2006.［3］高剑平,霍静思,李硕,等.影响新旧混凝土粘结强度的因素分析［J］.吉林建筑工程学院学报,2000(3):17-21.［4］李法冰,潘绍伟.关于新旧混凝土界面性能的探索［J］.四川建筑,2003(6):78-79.［5］周旺华.现代混凝土叠合结构［M］.北京:中国建筑工业出版社,1998.
