【作者】 吴轶； 杨春； 蔡健； 周云；

【Author】 WU Yi~1 YANG Chun~2 CAI Jian~2 1.College of Civil Engineering of Guangzhou University,Guangzhou,P.R.China 510006; 2.Department of Civil Engineering of South China University of Technology,Guangzhou,P.R.China 510640

【机构】 广州大学土木工程学院； 华南理工大学土木系；

【摘要】 利用有限元方法研究箱形型钢混凝土梁力学性能,分别变换跨高比、剪跨比、底部纵筋配筋率、腰筋配筋率、含钢率等参数,研究各参数对箱形型钢混凝土梁力学性能的影响作用.研究表明箱形型钢混凝土梁具有较好的延性;剪跨比越小,型钢梁的极限承载力增大,延性降低;底部纵筋配筋率越大,型钢梁的刚度越大,极限承载力越高,延性越好,小跨高比时,纵筋配筋率对箱形型钢梁的力学性能影响作用很小;提高腰筋配筋率可以小幅度提高箱形型钢混凝土梁的极限承载力,而对后期延性的提高作用显菩;随型钢厚度增大, 型钢梁的极限承载力增幅显著.更多还原

【Abstract】 Mechanical behaviors of box steel reinforced concrete (SRC) beams were studied using finite element method.By changing parameters,such as span - height ratios,shear span ratios,ratios of bottom flexural rein- forcements,ratios of web reinforcements and ratios of steel and so on,the effects of parameters on the mechani- cal behaviors of box SRC beams were mainly studied.It showed that box SRC beams exhibit pretty good ductili- ty ;with the decrease of shear span rations,the limit capacity of SRC beams was increased and the ductility was decreased;with the increase of ratio of bottom flexural reinforcement,the rigidity,limit capacity and ductility were increased,but when the span -height ratio was much small,the effects of ratio of bottom flexural rein- forcement were much insignificant;ratio of web reinforcements had much insignificant effects on limit capacity, but can greatly improve the post ductility of the SRC beams;the ratio of steel can significantly enhance the limit capacity of the box SRC beams.更多还原