后加混凝土-砌体组合墙体抗震性能试验研究
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摘要
根据某实际工程,设计1∶2缩尺的纵向和横向两种组合墙体试件进行低周反复荷载试验。针对后加混凝土构件-砌体组合墙体的承载力、延性、滞回特性、耗能能力及破坏模式、混凝土构件的应变和钢筋的应变发展过程等进行研究。结果表明:"拉结(剪切)钢筋+植筋"的连接节点具有可靠的连接性能,可以保证既有砌体结构与后加混凝土构件的协同工作;后加混凝土-砌体组合墙体具有更高的承载力及变形能力;通过等效黏滞阻尼系数对比分析可知,后加混凝土墙体提高了砌体墙的耗能能力;提出了后加混凝土-砌体组合墙体受剪承载力计算式,且与试验结果吻合较好。
Based on practical project,the lengthwise and the cross composite walls with scale of 1∶ 2 were constructed and subjected to the low cycle reversed loading test. The ultimate bearing capacity,ductility,hysteresis characteristic,stiffness degradation,dissipation capacity,damage pattern and the strain change laws of post-installed reinforced concrete member and steel bar were analyzed. The test results show that the connecting joint consisting of tie bars and embedded bars has reliable connection capacity. The composite wall has better load bearing capacity and deformation capacity than the masonry wall. According to the analysis results of equivalent viscous damping coefficients,the dissipation capacity of masonry wall is improved by post-installed concrete wall. In the end,the formula of shear capacity of composite wall is presented. And the calculating results agree well with test results.
Based on practical project,the lengthwise and the cross composite walls with scale of 1∶ 2 were constructed and subjected to the low cycle reversed loading test. The ultimate bearing capacity,ductility,hysteresis characteristic,stiffness degradation,dissipation capacity,damage pattern and the strain change laws of post-installed reinforced concrete member and steel bar were analyzed. The test results show that the connecting joint consisting of tie bars and embedded bars has reliable connection capacity. The composite wall has better load bearing capacity and deformation capacity than the masonry wall. According to the analysis results of equivalent viscous damping coefficients,the dissipation capacity of masonry wall is improved by post-installed concrete wall. In the end,the formula of shear capacity of composite wall is presented. And the calculating results agree well with test results.
引文
[1]高小旺,王菁,肖伟,等.八层砖墙与钢筋混凝土墙组合结构1/2比例模型抗震试验研究[J].建筑结构学报,1999,20(1):31-38.(GAO Xiaowang,WANG Jing,XIAO Wei,et al.Experimental study on the 1/2scale model of a 8-story composite structure of brick walls and concrete shear wall[J].Journal of Building Structures,1999,20(1):31-38.(in Chinese))
[2]高小旺.砌体墙与钢筋混凝土墙组合结构房屋的抗震性能[J].建筑结构,2003,33(10):71-73.
[3]汪梦甫,汪洋,王朝晖.砌体墙-钢筋混凝土墙组合结构的抗震非线性分析[J].铁道科学与工程学报,2006,3(3):52-56.(WANG Mengfu,WANG Yang,WANG Zhaohui.Nonlinear seismic response analysis method of composite structure of brick walls and concrete shear walls[J].Journal of Railway Science and Engineering,2006,3(3):52-56.(in Chinese))
[4]施卫星,汪洋.砌体墙-钢筋混凝土墙组合结构静力弹塑形分析研究[J].工程抗震与加固改造,2006,28(5):87-90.(SHI Weixing,WANG Yang.Static nonlinear pushover analysis of composite structure of brick walls and concrete shear walls[J].Earthquake Resistant Engineering and Retrofitting,2006,28(5):87-90.(in Chinese))
[5]孙义刚,周觐.砌体墙-钢筋混凝土墙组合结构中两种砌体墙单元模型的比较[J].四川建筑科学研究,2009,35(4):23-26.(SUN Yigang,ZHOU Jin.Static comparison of two models of masonry wall elements in masonry-RC wall composite structures[J].Building Science Research of Sichuan,2009,35(4):23-26.(in Chinese))
[6]朱伯龙.结构抗震试验[M].北京:地震出版社,1989:156-183.
[7]Mehrabi A B,Shing P B,Schuller M P.Experimental evaluation of masonry-infilled RC frames[J].Journal of Structural Engineering,ASCE,1996,122(3):228-237.
[8]Tomazevic M,Lutman M,Petkovic L.Seismic behavior of masonry walls:experimental simulation[J].Journal of Structural Engineering,ASCE,1996,122(9):1040-1047.
[9]Haach V G,Vasconcelos G,Lourenco P B.Experimental analysis of reinforced concrete block masonry walls subjected to in-plane cyclic loading[J].Journal of Structural Engineering,ASCE,2010,136(4):452-462.
[10]Tomazevic Miha,Weiss Polona.Displacement capacity of masonry buildings as a basis for the assessment of behavior factor:an experimental study[J].Bulletin of Earthquake Engineering,2010,8(6):1267-1294.
[11]周彬,吕西林,任晓崧.既有砌体结构墙体植筋拉拔性能的理论分析与试验研究[J].建筑结构学报,2012,33(11):132-141.(ZHOU Bin,LU Xilin,REN Xiaosong.Theoretical analysis and experimental research of the pull-out behavior of bonded steel bar embedded in the brick wall of masonry structure[J].Journal of Building Structures,2012,33(11):132-141.(in Chinese))
[12]周彬,任晓崧.既有砌体结构砖墙植筋的力学性能研究[J].力学季刊,2012,33(3):476-486.(ZHOU Bin,REN Xiaosong.Study on mechanics properties of post-installed steel bar embedded in the brick wall of existing masonry structures[J].Chinese Quarterly of Mechanics,2012,33(3):476-486.(in Chinese))
[2]高小旺.砌体墙与钢筋混凝土墙组合结构房屋的抗震性能[J].建筑结构,2003,33(10):71-73.
[3]汪梦甫,汪洋,王朝晖.砌体墙-钢筋混凝土墙组合结构的抗震非线性分析[J].铁道科学与工程学报,2006,3(3):52-56.(WANG Mengfu,WANG Yang,WANG Zhaohui.Nonlinear seismic response analysis method of composite structure of brick walls and concrete shear walls[J].Journal of Railway Science and Engineering,2006,3(3):52-56.(in Chinese))
[4]施卫星,汪洋.砌体墙-钢筋混凝土墙组合结构静力弹塑形分析研究[J].工程抗震与加固改造,2006,28(5):87-90.(SHI Weixing,WANG Yang.Static nonlinear pushover analysis of composite structure of brick walls and concrete shear walls[J].Earthquake Resistant Engineering and Retrofitting,2006,28(5):87-90.(in Chinese))
[5]孙义刚,周觐.砌体墙-钢筋混凝土墙组合结构中两种砌体墙单元模型的比较[J].四川建筑科学研究,2009,35(4):23-26.(SUN Yigang,ZHOU Jin.Static comparison of two models of masonry wall elements in masonry-RC wall composite structures[J].Building Science Research of Sichuan,2009,35(4):23-26.(in Chinese))
[6]朱伯龙.结构抗震试验[M].北京:地震出版社,1989:156-183.
[7]Mehrabi A B,Shing P B,Schuller M P.Experimental evaluation of masonry-infilled RC frames[J].Journal of Structural Engineering,ASCE,1996,122(3):228-237.
[8]Tomazevic M,Lutman M,Petkovic L.Seismic behavior of masonry walls:experimental simulation[J].Journal of Structural Engineering,ASCE,1996,122(9):1040-1047.
[9]Haach V G,Vasconcelos G,Lourenco P B.Experimental analysis of reinforced concrete block masonry walls subjected to in-plane cyclic loading[J].Journal of Structural Engineering,ASCE,2010,136(4):452-462.
[10]Tomazevic Miha,Weiss Polona.Displacement capacity of masonry buildings as a basis for the assessment of behavior factor:an experimental study[J].Bulletin of Earthquake Engineering,2010,8(6):1267-1294.
[11]周彬,吕西林,任晓崧.既有砌体结构墙体植筋拉拔性能的理论分析与试验研究[J].建筑结构学报,2012,33(11):132-141.(ZHOU Bin,LU Xilin,REN Xiaosong.Theoretical analysis and experimental research of the pull-out behavior of bonded steel bar embedded in the brick wall of masonry structure[J].Journal of Building Structures,2012,33(11):132-141.(in Chinese))
[12]周彬,任晓崧.既有砌体结构砖墙植筋的力学性能研究[J].力学季刊,2012,33(3):476-486.(ZHOU Bin,REN Xiaosong.Study on mechanics properties of post-installed steel bar embedded in the brick wall of existing masonry structures[J].Chinese Quarterly of Mechanics,2012,33(3):476-486.(in Chinese))
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