钢框架内填高延性纤维混凝土剪力墙结构滞回性能试验研究
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摘要
为改善钢框架内填钢筋混凝土剪力墙结构的抗震性能和变形能力,设计了一榀半刚接钢框架内填高延性纤维混凝土剪力墙试件,并进行了拟静力试验,研究其破坏机理、变形能力及耗能能力。试验结果表明:钢框架与内填高延性纤维混凝土剪力墙形成组合作用,能充分发挥高延性纤维混凝土良好的受拉应变硬化和多裂缝开展性能,有效控制剪切斜裂缝的开展,提高结构的层间变形能力;试件的开裂位移、屈服位移和峰值位移明显增大,表明高延性纤维混凝土良好的拉伸性能可提高结构的弹性层间位移;试件破坏时,能充分发挥高延性纤维混凝土剪力墙良好的耗能能力和耐损伤能力,减小钢框架的塑性变形,实现结构的可修复功能。
In order to improve the seismic behavior and deformation capacity of steel frame with reinforced concrete infill walls,the experimental study on partially-restrained steel frame with ductile fiber reinfoced-concrete( DFRC)infill wall( SDFRCW) was conducted to study failure mechanism,deformation and energy dissipation capacity capacity. Experimental results indicate that the composite action between steel frame and DFRC infill walls can effectively make use of the tensile strain-hardening behavior with multiple fine cracks,control shear oblique crack development and improve inter-story deformability; crack displacement,yield displacement and peak displacement of specimen obviously increase,which indicates that excellent tensile behavior of DFRC can improve elastic story drift of structure; when SDFRCW specimen fails,it could be made use of excellent energy dissipation capacity and damaged resistance capacity of DFRC shear wall to reduce the plastic deformation of steel frame and to realize the reparability function after strong earthquake.
In order to improve the seismic behavior and deformation capacity of steel frame with reinforced concrete infill walls,the experimental study on partially-restrained steel frame with ductile fiber reinfoced-concrete( DFRC)infill wall( SDFRCW) was conducted to study failure mechanism,deformation and energy dissipation capacity capacity. Experimental results indicate that the composite action between steel frame and DFRC infill walls can effectively make use of the tensile strain-hardening behavior with multiple fine cracks,control shear oblique crack development and improve inter-story deformability; crack displacement,yield displacement and peak displacement of specimen obviously increase,which indicates that excellent tensile behavior of DFRC can improve elastic story drift of structure; when SDFRCW specimen fails,it could be made use of excellent energy dissipation capacity and damaged resistance capacity of DFRC shear wall to reduce the plastic deformation of steel frame and to realize the reparability function after strong earthquake.
引文
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[17]寇佳亮,邓明科,梁兴文.延性纤维增强混凝土单轴拉伸性能试验研究[J].建筑结构,2013,43(1):59-64.(KOU Jialiang,DENG Mingke,LIANG Xingwen.Experimental study of uniaxial tensile properties of ductile fiber reinforced concrete[J].Building Structure,2013,43(1):59-64.(in Chinese))
[2]孙国华.半刚接钢框架内填RC墙结构滞回性能研究[D].北京:北京工业大学,2010:1-13.(SUN Guohua.Hysteretic behavior of partially-restrained steel frame with RC infill wall structural system[D].Beijing:Beijing University of Technology,2010:1-13.(in Chinese))
[3]彭晓彤,顾强,林晨.半刚性节点钢框架内填钢筋混凝土剪力墙结构试验研究[J].土木工程学报,2008,41(1):64-69.(PENG Xiaotong,GU Qiang,LIN Chen.Experimental study on steel frame-reinforced concrete infill wall structures with semi-rigid joints[J].China Civil Engineering Journal,2008,41(1):64-69.(in Chinese))
[4]孙国华,顾强,方有珍,等.半刚接钢框架内填RC墙结构滞回性能试验:整体性能分析[J].土木工程学报,2010,43(1):35-46.(SUN Guohua,GU Qiang,FANG Youzhen,et al.Experimental study of partiallyrestrained steel frame with RC infill walls:global performance analysis[J].China Civil Engineering Journal,2010,43(1):35-46.(in Chinese))
[5]孙国华,顾强,何若全,等.半刚接钢框架内填暗竖缝RC墙结构滞回性能试验研究[J].建筑结构学报,2010,31(9):16-26.(SUN Guohua,GU Qiang,HE Ruoquan,et al.Experimental investigation of partially-restrained steel frame with concealed vertical slits RC infill walls[J].Journal of Building Structures,2010,31(9):16-26.(in Chinese))
[6]Li V C,Leung C K Y.Steady state and multiple cracking of short random fiber composites[J].Journal of Engineering Mechanics,ASCE,1992,188(11):2246-2264.
[7]Li V C.ECC-tailored composites through micromechanical modeling[C]//Fiber Reinforced Concrete:Present and the Future Banthia.Montreal:CSCE,1998:64-97.
[8]Li V C.On engineered cementitious composites(ECC):a review of the material and its applications[J].Journal of Advanced Concrete Technology,2003,1(3):215-230.
[9]Li V C,Wang S,Wu C.Tensile strain-hardening behavior of PVA-ECC[J].ACI Materials Journal,2001,98(6):483-492.
[10]Fischer G,Li V C.Effect of matrix ductility on deformation behavior of steel reinforced ECC flexural members under reversed cyclic loading conditions[J].ACI Structural Journal,2002,99(6):781-790.
[11]Li V C,Mishra D K,Naaman A E,et al.On the shear behavior of ECC[J].Advanced Cement Based Materials,1994,1(3):142-149.
[12]Kabele P,Li V C,Horii H,et al.Use of BMC for ductile structural members[C]//In Proceeding of 5th International Symposium on Brittle Matrix Composites(BMC-5).Warsaw,Poland:BIGRAF and Woodhead Publisher,1997:579-588.
[13]Fischer G,Li V C.Influence of matrix ductility on the tension-stiffening behavior of steel reinforced ECC[J].ACI Structural Journal,2002,99(1):104-111.
[14]Maalej M,Zhang J,Quek S T,et al.High-velocity impact resistance of hybrid-fiber engineered cementitious composites[C]//Proceedings of the Fifth International Conference on Fracture Mechanics of Concrete and Concrete Structures(Fra MCo S-5).Vail,Colorado,USA:International Association for Fra MCo S,2004:1051-1058.
[15]苏骏,徐世烺.超高韧性水泥基材料新型框架节点性能研究[J].世界地震工程,2012,28(2):110-114.(SU Jun,XU Shilang.Research on performance of new-type frame joints of ultra-high toughness cementitious composites[J].World Earthquake Engineering,2012,28(2):110-114.(in Chinese))
[16]方超.高延性纤维混凝土低矮剪力墙抗震性能试验研究[D].西安:西安建筑科技大学,2013:35-60.(FANG Chao.Experimental study on seismic behavior of high ductility fiber concrete low-rise shear wall[D].Xi’an:Xi’an University of Architecture and Technology,2013:35-60.(in Chinese))
[17]寇佳亮,邓明科,梁兴文.延性纤维增强混凝土单轴拉伸性能试验研究[J].建筑结构,2013,43(1):59-64.(KOU Jialiang,DENG Mingke,LIANG Xingwen.Experimental study of uniaxial tensile properties of ductile fiber reinforced concrete[J].Building Structure,2013,43(1):59-64.(in Chinese))
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