基于数值模拟方法再生混凝土梁弯曲延性分析  

Ductility analysis for recycled concrete beam based on numerical simulation method

作　　者：姚大立 杨卫闯 魏华 余芳 YAO Da-li;YANG Wei-chuang;WEI Hua;YU Fang(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院

出　　处：《沈阳工业大学学报》2019年第4期464-468,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金青年基金资助项目(51608331);辽宁省博士启动基金资助项目(201601171)

摘　　要：为了研究再生混凝土梁的弯曲延性性能和界限配筋率,利用ABAQUS软件分析了混凝土强度、配筋率以及混凝土种类对再生混凝土梁弯曲延性的影响.结果表明:再生混凝土梁的弯曲延性随着混凝土强度的增加而增大;在适筋梁范围内,最小配筋率下的弯曲延性最好,同等条件下,再生混凝土梁的弯曲延性较普通混凝土梁提高约17. 7%;再生混凝土梁的最小配筋率与普通混凝土梁相似,最大配筋率比普通混凝土梁降低约17. 2%,本文建议再生混凝土梁的最小配筋率为0. 25%,最大配筋率为2. 32%.In order to study the flexural ductility and critical reinforcement ratio of recycled concrete beams,the influence of concrete strength,reinforcement ratio and concrete type on the flexural ductility of recycled concrete beams was studied with the ABAQUS software. The results showthat the flexural ductility of recycled concrete beams increases with increase of concrete strength. In the range of balanced-reinforcing beams,the flexural ductility is optimum under the minimum reinforcement ratio. Compared with the ordinary concrete beams,the flexural ductility of recycled concrete beams increases by about 17. 7% under the same conditions. The minimum reinforcement ratio of recycled concrete beams is similar to that of ordinary concrete beams,while the maximum reinforcement ratio is about 17. 2% lower than that of ordinary concrete beams. The minimum reinforcement ratio of recycled concrete beams suggested in this paper is 0. 25%,and the maximum value is 2. 32%.

关 键 词：再生混凝土 弯曲延性 界限配筋率 混凝土强度 混凝土种类 最小配筋率 最大配筋率 

分 类 号：TU375[建筑科学—结构工程]