高宽比对格构式再生混凝土墙体抗震性能影响
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摘要
目的通过试验研究高宽比不同的格构式再生混凝土墙体抗震性能,为其在工程实际的应用提供参考依据.方法使用骨料增强措施处理后的再生骨料,配制成再生混凝土,浇筑在预制而成的保温模块拼接模板中,并在模板横向和纵向孔洞中分别按构造布置钢筋,形成格构式再生混凝土墙体,对3个高宽比不同的试件进行低周往复荷载作用的试验.结果墙体破坏形态均表现为剪切型破坏,墙体相邻格构柱间的连梁首先出现环状裂缝和交叉裂缝,导致连梁先于格构柱破坏,随后墙体格构柱混凝土出现贯通交叉裂缝,最终试件破坏;墙体延性系数均大于3,极限位移角较小;随着高宽比的增大,墙体的侧向刚度和极限承载力均下降,但变形能力与耗能能力逐渐增强.结论格构式再生混凝土墙体具有良好的抗震性能,可以用于结构构件中.
The purpose of this paper is to do research on the influence of aspect ratio on seismic performance of recycled concrete lattice walls by experiment.The concrete in the experiment is made by recycled coarse aggregate from waste concrete.Recycled concrete is poured into EPS module,and the reinforcing steel bar is placed in hole of vertical and horizontal respectively according to structural requirements.The cyclic loading is applied on the 3 specimens with different aspect ratios,after recycled concrete lattice walls are finished.The failure mode of the there specimens are all shear-type failure.The circular cracks and X type cracks appear in the connecting beam first,which leads to the failure of connecting beam.After the failure of the connecting beam,the X type cracks appear in the lattice walls.Ductility coefficient of specimens are all more than 3.At the same time,the limit displacement angles are all very small.Both lateral rigidity and ultimate bearing capacity of specimens decrease with the increasing of aspect ratio,but deformation capacity and energy dissipation capacity increase.Recycled concrete lattice walls has high bearing capacity.
The purpose of this paper is to do research on the influence of aspect ratio on seismic performance of recycled concrete lattice walls by experiment.The concrete in the experiment is made by recycled coarse aggregate from waste concrete.Recycled concrete is poured into EPS module,and the reinforcing steel bar is placed in hole of vertical and horizontal respectively according to structural requirements.The cyclic loading is applied on the 3 specimens with different aspect ratios,after recycled concrete lattice walls are finished.The failure mode of the there specimens are all shear-type failure.The circular cracks and X type cracks appear in the connecting beam first,which leads to the failure of connecting beam.After the failure of the connecting beam,the X type cracks appear in the lattice walls.Ductility coefficient of specimens are all more than 3.At the same time,the limit displacement angles are all very small.Both lateral rigidity and ultimate bearing capacity of specimens decrease with the increasing of aspect ratio,but deformation capacity and energy dissipation capacity increase.Recycled concrete lattice walls has high bearing capacity.
引文
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[16]Poon C S,Shui Z H,Lam L.Effect of microstructureof ITZ on compressive strength of concrete w ith re-cycled aggregates[J].Construction and BuildingMaterials,2004,18(6):461-468.
[17]Kelley L,Michacl L.Design philosophy for structuralstrengthening w ith FRP[J].Concrete International,2000(2):77-82.
[18]周静海,王鹏里,孟宪宏,等.小剪跨比格构式混凝土墙体抗震性能试验[J].地震工程与工程振动,2011,31(3):127-133.(Zhou Jinghai,Wang Pengli,Meng Xianhong,et al.Experimental study on seismic behavior of concretegrillage w alls w ith different shear span ratio[J].Journal of Earthquake Engineering and EngineeringVibration,2011,31(3):127-133.)
[19]王鹏里.不同剪跨比EPS新型节能墙体抗震性能试验研究[D].沈阳:沈阳建筑大学,2011.(Wang Pengli.Experimental study on seismic behav-ior of EPS new energy saving w alls w ith differentshear span ratio[D].Shenyang:Shenyang JianzhuUniversity,2011.)
[2]刘数华,冷发光.再生混凝土技术[M].北京:中国建筑工业出版社,2007.(Liu Shuhua,Leng Faguang.Recycled concrete tech-nology[M].Beijing:Construction Industry Press,2007.)
[3]杜婷,李惠强,覃亚伟,等.再生混凝土未来发展的探讨[J].混凝土,2002,4:49-52.(Du Ting,Li Huiqiang,Tan Yawei,et al.Discussionon the development of regenerative concrete in thefuture[J].Concrete,2002,4:49-52.)
[4]王国亮.再生混凝土密肋复合墙体抗屁性能分析[D].西安:西安建筑科技大学,2010.(Wang Guoliang.Analysis on seismic performanceof recycled concrete multi-ribbed composite w all[D].Xi'an:Xi'an University of Architecture andTechnology,2010.)
[5]余晓峰,姚谦峰,王国亮,等.再生混凝土密肋复合墙体受力性能试验研究[J].西安建筑科技大学学报,2009,41(6):827-833.(Yu Xiaofeng,Yao Qianfeng,Wang Guoliang,et al.Mechanical characteristics and analyses of seismicperformance of multi-rib slab w all[J].Journal of Xi'an University of Architecture and Technology,2009,41(6):827-833.)
[6]姚谦峰,余晓峰,张荫,等.低周反复荷载下再生混凝土密肋复合墙体抗震性能试验研究[J].建筑结构学报,2009(S2):21-25.(Yao Qianfeng,Yu Xiaofeng,Zhang Yin,et al.Me-chanical characteristics and seismic performance ofmulti-rib slab w all[J].Journal of Building Struc-tures,2009(S2):21-25.)
[7]Xiong Lihong,David Xiong,Wu Ruifeng,et al.Sha-king table tests and dynamic analyses of masonryw all buildings w ith frame-shear w alls at low er stories[J].Earthquake Engineering and Engineering Vibra-tion,2008,7(3):271-283.
[8]张展,周克荣.变高宽比高性能混凝土剪力墙抗震性能的试验研究[J].结构工程师,2004(2):62-68.(Zhang Zhan,Zhou Kerong.Experimental study onseismic behavior of high-performance concrete shearw alls w ith various aspect ratios[J].Structural Engi-neers,2004(2):62-68.)
[9]Wang Jun,Zhao Tianshi,Xie Hengyan,et al.Experi-mental research on shear carrying capacity of H-steelconcrete composite beam w ith small shear span ratio[J].Journal of Harbin Institute of Technology,2010,17(3):398-400.
[10]倪天宇,郭樟根,孙伟民,等.再生混凝土空心砌块墙体的抗震性能[J].东南大学学报:自然科学版,2009,39:212-216.(Ni Tianyu,Guo Zhanggen,Sun Weimin,et al.Seis-mic behaviors of recycled concrete hollow block ma-sonry w alls[J].Journal of Southeast University:Nat-ural Science,2009,39:212-216.)
[11]夏琴.再生混凝土受弯构件抗震性能试验研究[D].合肥:合肥工业大学,2009.(Xia Qin.Experimental study on seismic perform-ance of recycled concrete members subjected to flex-ural[D].Hefei:Hefei University of Technology,2009.)
[12]Su R K L,Wong S M.Seismic behaviour of slenderreinforced concrete shear w alls under high axial loadratio[J].Engineering Structures,2007,29(8):1957-1965.
[13]Soon Ho Cho,Bryce Tupper,William D,et al.Struc-tural steel boundary elements for ductile concretew alls[J].Journal of Structural Engineering,2004,130(5):762-768.
[14]Park W S,Yun H D.Seismic behaviour of couplingbeams in a hybrid coupled shear w alls[J].Journal ofConstructional Steel Research,2005,61(4):1492-1524.
[15]Tegos I A,Penelis G G.Seismic resistance of shortcolumns and coupling beams reinforced w ith inclinedbars[J].ACI Structural Journal,1988,85(1):82-88.
[16]Poon C S,Shui Z H,Lam L.Effect of microstructureof ITZ on compressive strength of concrete w ith re-cycled aggregates[J].Construction and BuildingMaterials,2004,18(6):461-468.
[17]Kelley L,Michacl L.Design philosophy for structuralstrengthening w ith FRP[J].Concrete International,2000(2):77-82.
[18]周静海,王鹏里,孟宪宏,等.小剪跨比格构式混凝土墙体抗震性能试验[J].地震工程与工程振动,2011,31(3):127-133.(Zhou Jinghai,Wang Pengli,Meng Xianhong,et al.Experimental study on seismic behavior of concretegrillage w alls w ith different shear span ratio[J].Journal of Earthquake Engineering and EngineeringVibration,2011,31(3):127-133.)
[19]王鹏里.不同剪跨比EPS新型节能墙体抗震性能试验研究[D].沈阳:沈阳建筑大学,2011.(Wang Pengli.Experimental study on seismic behav-ior of EPS new energy saving w alls w ith differentshear span ratio[D].Shenyang:Shenyang JianzhuUniversity,2011.)
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