疊合梁受彎性能試驗研究*
王磊1，2，彭笑川1，2
- 摘 要
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王磊1，2，彭笑川1，2（1 桂林理工大學土木與建筑工程學院， 桂林 541004；2廣西建筑新能源與節(jié)能重點實驗室， 桂林 541004）［摘要］為了解疊合混凝土梁的力學性能，對6根受拉區(qū)新增受力鋼筋疊合梁進行了試驗研究，探討了受拉區(qū)新增受力鋼筋疊合梁的裂縫、撓度的發(fā)展變化規(guī)律，極限抗彎承載力以及破壞形態(tài)。試驗研究表明，疊合層強度高一級別的疊合構(gòu)件基本性能與整體澆筑梁相近，其裂縫條數(shù)較多、寬度較大，但并不能明顯提高鋼筋混凝土梁的屈服彎矩和極限彎矩。［關鍵詞］疊合梁； 受彎性能； 裂縫； 抗彎承載力中圖分類號：TU375.1 文獻標識碼：A 文章編號：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*廣西自然基金“2012GXNSFBA053151”，廣西重點實驗室開放基金項目（11-03-21-3），廣西科技攻關項目（桂科攻0992001-2）。參考文獻［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］劉艷萌.新舊混凝土粘結(jié)技術研究［D］.重慶:重慶大學,2006.［3］高劍平,霍靜思,李碩,等.影響新舊混凝土粘結(jié)強度的因素分析［J］.吉林建筑工程學院學報,2000(3):17-21.［4］李法冰,潘紹偉.關于新舊混凝土界面性能的探索［J］.四川建筑,2003(6):78-79.［5］周旺華.現(xiàn)代混凝土疊合結(jié)構(gòu)［M］.北京:中國建筑工業(yè)出版社,1998.
