不同构造措施的冷弯薄壁型钢混凝土剪力墙抗剪性能试验研究
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摘要
研究了一种新型钢-混凝土组合墙体,即冷弯薄壁型钢增强的混凝土剪力墙的抗剪性能。通过5个冷弯薄壁型钢混凝土剪力墙和1个钢筋混凝土剪力墙的拟静力试验,研究了边缘构件纵筋类型及数量、表面钢模网、冷弯薄壁型钢底部锚固等构造措施对剪力墙抗剪性能的影响。研究表明:配筋合适的冷弯薄壁型钢混凝土剪力墙的受剪性能和破坏模式与传统钢筋混凝土剪力墙不同,从开始受力到破坏经历了整截面墙到分缝剪力墙的演变过程,具有很好的延性和变形能力;表面配置钢模网可提高墙体承载力,但会降低延性和极限变形能力;冷弯薄壁型钢锚固于基础中可保持后期承载力的稳定;适当增加边缘构件的纵筋量可提高墙体的变形能力。基于试验研究,建议了冷弯薄壁型钢混凝土剪力墙的合理构造措施。
An innovated steel-concrete composite structural wall,CTSRC(Cold-formed Thin-walled Steel Reinforced Concrete) shear wall,is presented.Five CTSRC shear walls and one steel bars reinforced concrete(RC) shear wall are tested quasi-statically under low cyclic lateral loads for shear performance,and the effects of longitudinal reinforcement in the edge member,the anchorage of the cold-formed thin-walled steel,and the steel meshes are investigated.The test results show that CTSRC shear walls have adequate ductility and deformability in view of their failure process from integral wall to slit wall,which is different to that of RC walls.The study proves that the steel meshes increase the wall's bearing capacity,but impair its ductility and deformability.It can be found that anchoring steel profiles into the basement makes the later bearing capacity stable,and that the wall's behavior is improved with the increase of longitudinal reinforcement in the edge member.Based on above observations,the reasonable configurations of the details of CTSRC shear walls are suggested for actual applications.
An innovated steel-concrete composite structural wall,CTSRC(Cold-formed Thin-walled Steel Reinforced Concrete) shear wall,is presented.Five CTSRC shear walls and one steel bars reinforced concrete(RC) shear wall are tested quasi-statically under low cyclic lateral loads for shear performance,and the effects of longitudinal reinforcement in the edge member,the anchorage of the cold-formed thin-walled steel,and the steel meshes are investigated.The test results show that CTSRC shear walls have adequate ductility and deformability in view of their failure process from integral wall to slit wall,which is different to that of RC walls.The study proves that the steel meshes increase the wall's bearing capacity,but impair its ductility and deformability.It can be found that anchoring steel profiles into the basement makes the later bearing capacity stable,and that the wall's behavior is improved with the increase of longitudinal reinforcement in the edge member.Based on above observations,the reasonable configurations of the details of CTSRC shear walls are suggested for actual applications.
引文
[1]冯鹏,初明进,侯建群,叶列平.钢网构架混凝土复合结构多层住宅足尺模型抗震性能试验研究[J].建筑结构学报,2009,30(3):1―10.Feng Peng,Chu Mingjin,Hou Jianqun,Ye Lieping.Experimental study on aseismic performance of a full-scale multi-story residential building of CTSRC structure[J].Journal of Building Structures,2009,30(3):1―10.(in Chinese)
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[4]乔彦明,钱稼茹,方鄂华.钢骨混凝土剪力墙抗剪性能的试验研究[J].建筑结构,1995,25(8):3―7.Qiao Yanming,Qian Jiaru,Fang Ehua.Experimental study on shear behaviors of steel reinforced shear wall[J].Building Structures,1995,25(8):3―7.(in Chinese)
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[7]曹万林,张建伟,董宏英,郑同亮.内藏桁架混凝土组合高剪力墙抗震性能[J].哈尔滨工业大学学报,2009,41(4):153―158.Cao Wanlin,Zhang Jianwei,Dong Hongying,Zheng Tongliang.Seismic performance of high-rise shear wall with concealed truss[J].Journal of Harbin Institute of Technology,2009,41(4):153―158.(in Chinese)
[8]吕西林,董宇光,丁子文.截面中部配置型钢的混凝土剪力墙抗震性能研究[J].地震工程与工程振动,2006,26(6):101―107.Lu Xilin,Dong Yuguang,Ding Ziwen.Study on seismic behavior of steel reinforced concrete wall[J].Earthquake Engineering and Engineering Vibration,2006,26(6):101―107.(in Chinese)
[9]初明进,冯鹏,侯建群,叶列平,刘彦生.钢网构架混凝土复合结构多层住宅墙体抗震性能试验研究[J].土木工程学报,2009,42(7):36―45.Chu Mingjin,Feng Peng,Hou Jianqun,Ye Lieping,Liu Yansheng.Experimental study on the seismic behavior of innovated CTSRC composite shear walls for multi-story residences[J].China Civil Engineering Journal,2009,42(7):36―45.(in Chinese)
[10]GB 50011-2001,建筑抗震设计规范[S].2001.GB 50011-2001,Code for seismic design of buildings[S].2001.(in Chinese)
[11]JGJ 114-2003,钢筋焊接网混凝土结构技术规程[S].2003.JGJ 114-2003,Technical specification for concrete structures reinforced with welded steel fabric[S].2003.(in Chinese)
[2]Lopes M S.Experimental shear-dominated response of RC walls Part I:Objectives,methodology and results[J].Engineering Structures,2001,23:229―239.
[3]Hidalgo P A,Ledezma C A,Jordan R M.Seismic behavior of squat reinforced concrete shear walls[J].Earthquake Spectra,2002,18(2):287―308.
[4]乔彦明,钱稼茹,方鄂华.钢骨混凝土剪力墙抗剪性能的试验研究[J].建筑结构,1995,25(8):3―7.Qiao Yanming,Qian Jiaru,Fang Ehua.Experimental study on shear behaviors of steel reinforced shear wall[J].Building Structures,1995,25(8):3―7.(in Chinese)
[5]黄双华,黄雄军.劲性混凝土带边框低剪力墙极限承载力的计算[J].西南交通大学学报,2001,36(4):360―364.Huang Shuanghua,Huang Xiongjun.Computation of the ultimate bearing capacity of steel reinforced concrete low-rise shear walls with frame[J].Journal of Southwest Jiaotong University,2001,36(4):360―364.(in Chinese)
[6]王曙光,蓝宗建.劲性钢筋混凝土开洞低剪力墙拟静力试验研究[J].建筑结构学报,2005,26(1):85―90,124.Wang Shuguang,Lan Zongjian.Experimental research on seismic capability of steel reinforced concrete low shear wall with opening[J].Journal of Building Structures,2005,26(1):85―90,124.(in Chinese)
[7]曹万林,张建伟,董宏英,郑同亮.内藏桁架混凝土组合高剪力墙抗震性能[J].哈尔滨工业大学学报,2009,41(4):153―158.Cao Wanlin,Zhang Jianwei,Dong Hongying,Zheng Tongliang.Seismic performance of high-rise shear wall with concealed truss[J].Journal of Harbin Institute of Technology,2009,41(4):153―158.(in Chinese)
[8]吕西林,董宇光,丁子文.截面中部配置型钢的混凝土剪力墙抗震性能研究[J].地震工程与工程振动,2006,26(6):101―107.Lu Xilin,Dong Yuguang,Ding Ziwen.Study on seismic behavior of steel reinforced concrete wall[J].Earthquake Engineering and Engineering Vibration,2006,26(6):101―107.(in Chinese)
[9]初明进,冯鹏,侯建群,叶列平,刘彦生.钢网构架混凝土复合结构多层住宅墙体抗震性能试验研究[J].土木工程学报,2009,42(7):36―45.Chu Mingjin,Feng Peng,Hou Jianqun,Ye Lieping,Liu Yansheng.Experimental study on the seismic behavior of innovated CTSRC composite shear walls for multi-story residences[J].China Civil Engineering Journal,2009,42(7):36―45.(in Chinese)
[10]GB 50011-2001,建筑抗震设计规范[S].2001.GB 50011-2001,Code for seismic design of buildings[S].2001.(in Chinese)
[11]JGJ 114-2003,钢筋焊接网混凝土结构技术规程[S].2003.JGJ 114-2003,Technical specification for concrete structures reinforced with welded steel fabric[S].2003.(in Chinese)
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