基于数值模拟方法再生混凝土梁弯曲延性分析
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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%.
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%.
引文
[1]史才军,曹芷杰,谢昭彬.再生混凝土力学性能的研究进展[J].材料导报,2016,30(23):96-103.(SHI Cai-jun,CAO Zhi-jie,XIE Zhao-bin. Research progress in the mechanical properties of recycled aggregate concrete[J]. M aterials Review,2016,30(23):96-103.)
[2]杜绍帅.混凝土受弯构件挠度控制的可靠度分析[D].西安:西安建筑科技大学,2017.(DU Shao-shuai. Reliability analysis on deflection control of concrete flexural members[D]. Xi’an:Xi’an University of Architecture and Technology,2017.)
[3]杨璐,石旭武.钢筋混凝土梁塑性损伤模型的数值模拟[J].沈阳工业大学学报,2016,38(1):97-101.(YANG Lu,SHI Xu-wu. Numerical simulation of plastic damage model for reinforced concrete beam[J]. Journal of Shenyang University of Technology,2016,38(1):97-101.)
[4]杨桂新,吴瑾,叶强.再生混凝土梁挠度计算方法研究[J].工程力学,2011,28(2):147-151.(YANG Gui-xin,WU Jin,YE Qiang. Study on deflection of recycled concrete beams[J]. Engineering M echanics,2011,28(2):147-151.)
[5]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32.(CHEN Zong-ping,XU Jin-jun,ZHENG Hua-hai,et al. Basic mechanical properties test and stress-strain constitutive relations of recycled coarse aggregate concrete[J]. Journal of Building M aterials,2013,16(1):24-32.)
[6]胡少伟,黄逸群.混凝土轴拉加卸载随机损伤模型的建立与试验验证[J].应用数学和力学,2017,38(6):652-662.(HU Shao-wei,HUANG Yi-qun. A stochastic tensile damage model for loading/unloading of concrete and experimental validation[J]. Applied M athematics and M echanics,2017,38(6):652-662.)
[7]高丹盈,陈刚,赵亮平,等.钢筋与钢纤维混凝土的黏结-滑移性能及其关系模型[J].建筑结构学报,2015,36(7):132-139.(GAO Dan-ying,CHEN Gang,ZHAO Liang-ping,et al. Bond-slip behavior and constitutive model between rebar and steel fibre reinforced concrete[J]. Journal of Building Structures,2015,36(7):132-139.)
[8]李宝磊,宋立,樊成,等. FRP筋混凝土梁受弯性能影响因素的有限元分析[J].水利与建筑工程学报,2015,13(3):100-104.(LI Bao-lei,SONG Li,FAN Cheng,et al. Finite element analysis of the bending performance influencing factors of FRP reinforced concrete beams[J]. Journal of Water Resources and Architectural Engineering,2015,13(3):100-104.)
[2]杜绍帅.混凝土受弯构件挠度控制的可靠度分析[D].西安:西安建筑科技大学,2017.(DU Shao-shuai. Reliability analysis on deflection control of concrete flexural members[D]. Xi’an:Xi’an University of Architecture and Technology,2017.)
[3]杨璐,石旭武.钢筋混凝土梁塑性损伤模型的数值模拟[J].沈阳工业大学学报,2016,38(1):97-101.(YANG Lu,SHI Xu-wu. Numerical simulation of plastic damage model for reinforced concrete beam[J]. Journal of Shenyang University of Technology,2016,38(1):97-101.)
[4]杨桂新,吴瑾,叶强.再生混凝土梁挠度计算方法研究[J].工程力学,2011,28(2):147-151.(YANG Gui-xin,WU Jin,YE Qiang. Study on deflection of recycled concrete beams[J]. Engineering M echanics,2011,28(2):147-151.)
[5]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32.(CHEN Zong-ping,XU Jin-jun,ZHENG Hua-hai,et al. Basic mechanical properties test and stress-strain constitutive relations of recycled coarse aggregate concrete[J]. Journal of Building M aterials,2013,16(1):24-32.)
[6]胡少伟,黄逸群.混凝土轴拉加卸载随机损伤模型的建立与试验验证[J].应用数学和力学,2017,38(6):652-662.(HU Shao-wei,HUANG Yi-qun. A stochastic tensile damage model for loading/unloading of concrete and experimental validation[J]. Applied M athematics and M echanics,2017,38(6):652-662.)
[7]高丹盈,陈刚,赵亮平,等.钢筋与钢纤维混凝土的黏结-滑移性能及其关系模型[J].建筑结构学报,2015,36(7):132-139.(GAO Dan-ying,CHEN Gang,ZHAO Liang-ping,et al. Bond-slip behavior and constitutive model between rebar and steel fibre reinforced concrete[J]. Journal of Building Structures,2015,36(7):132-139.)
[8]李宝磊,宋立,樊成,等. FRP筋混凝土梁受弯性能影响因素的有限元分析[J].水利与建筑工程学报,2015,13(3):100-104.(LI Bao-lei,SONG Li,FAN Cheng,et al. Finite element analysis of the bending performance influencing factors of FRP reinforced concrete beams[J]. Journal of Water Resources and Architectural Engineering,2015,13(3):100-104.)