钢筋混凝土空心剪力墙刚度退化研究
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摘要
基于不同剪跨比的6个钢筋混凝土空心剪力墙试件在低周反复水平荷载作用下的试验结果,研究试件从开始加荷到破坏过程中刚度退化的规律.通过对试验所得各试件滞回曲线及骨架曲线的分析,得出刚度退化系数随试件顶点位移变化的规律,并与有关文献中普通钢筋混凝土剪力墙刚度退化规律进行比较.研究结果表明:钢筋混凝土空心剪力墙在开裂之前,基本处于弹性工作阶段,在开裂之后刚度退化速度较普通钢筋混凝土剪力墙快.当剪跨比大于1小于2时,钢筋混凝土空心剪力墙刚度退化速度较普通钢筋混凝土剪力墙快大约25%;当剪跨比小于1时,前者较后者快大约25%-35%;当层间位移角达1/200时,二者的刚度退化速度接近.
Based on the test of 6 R.C hollow shear wall samples with different shear span ratio under low cycle and reverse horizontal load,the samples stiffness degeneration law is studied.Through analyzing the load-displacement curves and skeleton curves the changing law of stiffness degeneration coeffcient with sample top displacement can be obtained compared to the stiffness degeneration law of common R.C shear wall.Study results indicate that before the R.C hollow shear walls crack,they work in elasticity stage.After cracking R.C hollow shear wall stiffness degeneration speed is quicker than common R.C shear wall.When shear span ratio is bigger than 1 and smaller than 2,R.C hollow shear wall stiffness degeneration speed is about 25% quicker than common R.C shear wall.When shear span ratio is smaller than 1,the former is about 25%-35% quicker than the latter.When storey displacement angle reaches 1/200,the stiffness degeneration speed is close to each other.
Based on the test of 6 R.C hollow shear wall samples with different shear span ratio under low cycle and reverse horizontal load,the samples stiffness degeneration law is studied.Through analyzing the load-displacement curves and skeleton curves the changing law of stiffness degeneration coeffcient with sample top displacement can be obtained compared to the stiffness degeneration law of common R.C shear wall.Study results indicate that before the R.C hollow shear walls crack,they work in elasticity stage.After cracking R.C hollow shear wall stiffness degeneration speed is quicker than common R.C shear wall.When shear span ratio is bigger than 1 and smaller than 2,R.C hollow shear wall stiffness degeneration speed is about 25% quicker than common R.C shear wall.When shear span ratio is smaller than 1,the former is about 25%-35% quicker than the latter.When storey displacement angle reaches 1/200,the stiffness degeneration speed is close to each other.
引文
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[7]张弢.钢筋混凝土空心剪力墙刚度退化试验研究及框-剪结构中应用方法分析[D].西安:西安建筑科技大学,2004.ZHANG Tao.The stiffness degeneration s experi mental study and application method s analysis in frame-shear wallsturcyure on hollowshear wall of reinforced concrete[D].Xi an:Xi an Univ.of Arch.&.Tech.,2004.
[2]乌鲁木齐市建委,乌鲁木齐市建筑设计院,西安建筑科技大学.钢筋混凝土空心剪力墙试件试验研究[R].西安:西安建筑科技大学,2003.Wulumuqi Build Committee,Wulumuqi Build Design Institute,Xi’an Univ.of Arch.&.Tech.Study on R.C hollowshear wall Speci mens experi ment[R].Xi’an:Xi’an Univ.of Arch.&.Tech.,2003.
[3]许淑芳,冯瑞玉,张兴虎,等.钢筋混凝土空心剪力墙抗震性能研究[J].西安建筑科技大学学报:自然科学板,2002,34(2):133-136.XU Shu-fang,FENG Rui-yu,ZHANG Xing-hu,et al.An Experi mental study on the aseismatic behavior of R.C hol-lowshear wall[J].J.of Xi an Univ.of Arch&Tech.(Natural Science Edition),2002,34(2):133-136.
[4]西宁市城乡规划建设局,西安建筑科技大学.钢筋混凝土空心剪力墙建筑抗震性能研究及在住宅中的应用[R].西安:西安建筑科技大学,2004.Xining Town and Country Planning Build Bureau,Xi’an Univ.of Arch.&.Tech.Sdudy on the aseismatic behaviorof R.C hollowshear wall and applicationin residence[R].Xi an:Xi an Univ.of Arch.&.Tech.,2004.
[5]杨永哲.钢筋混凝土空心剪力墙震性能试验研究及非线性有限元分析[D].西安:西安建筑科技大学,2004.The Experi mental study and non-linear FEManalysis of hollowshear wall of reinforced concrete[D].Xi an:Xi anUniv.of Arch.&.Tech.,2004.
[6]Paulay T,Priestly MJ N,Synge AJ.Ductilityin eaethquake resisting squat shear-wall[J].Journel ACI,1982(4):35-38.
[7]张弢.钢筋混凝土空心剪力墙刚度退化试验研究及框-剪结构中应用方法分析[D].西安:西安建筑科技大学,2004.ZHANG Tao.The stiffness degeneration s experi mental study and application method s analysis in frame-shear wallsturcyure on hollowshear wall of reinforced concrete[D].Xi an:Xi an Univ.of Arch.&.Tech.,2004.
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