基于不同剪跨比的生态复合墙体抗震性能及受剪承载力分析
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摘要
通过1/2比例内填秸秆泥坯砌块生态复合墙体(ECW-4)的低周反复荷载试验,研究其破坏形态、承载能力、变形、延性、耗能等抗震性能,并在前期试验研究的基础上,对不同剪跨比的生态复合墙体抗震性能进行对比分析;针对不同剪跨比墙体建立非线性有限元模型,对其破坏模式及受剪承载力进行分析。结果表明:随着剪跨比的增大墙体受剪承载力下降明显,但变形能力及耗能能力有所提高;基于合理破坏模式(剪切型破坏)提出剪跨比的合理取值范围(1.0≤λ≤1.8);并提出基于不同剪跨比的生态复合墙体极限受剪承载力修正公式,其计算结果与试验值的误差较小,满足工程精度要求。
A group of 1/2 scale model of ecological composite wall with straw mud billet block was tested under low-frequency cyclic loading.The seismic performance of the specimen,such as failure mode,shearing capacity,deformation,ductility,energy dissipation and so on,was mainly researched.And the seismic performance comparative analysis of the ecological composite wall with different shear span ratio was made base on the pre-experimental study.A non-linear finite element model was established to analyze its failure mode and shear capacity with different shear span ratio.The results showed that with the increase of the shear span ratio,the shear capacity of wall was decreased significantly,but deformation capacity and energy dissipation capacity were increased.Based on reasonable failure mode(shear type failure) the rational value ranges(1.0≤λ≤1.8)about shear span ratio were put forward,and the ultimate shearing capacity modified formula for eco-composite wall based on different shear span ratio was proposed.The error of calculation results was small is compared with test value,which satisfied the engineering precision.
A group of 1/2 scale model of ecological composite wall with straw mud billet block was tested under low-frequency cyclic loading.The seismic performance of the specimen,such as failure mode,shearing capacity,deformation,ductility,energy dissipation and so on,was mainly researched.And the seismic performance comparative analysis of the ecological composite wall with different shear span ratio was made base on the pre-experimental study.A non-linear finite element model was established to analyze its failure mode and shear capacity with different shear span ratio.The results showed that with the increase of the shear span ratio,the shear capacity of wall was decreased significantly,but deformation capacity and energy dissipation capacity were increased.Based on reasonable failure mode(shear type failure) the rational value ranges(1.0≤λ≤1.8)about shear span ratio were put forward,and the ultimate shearing capacity modified formula for eco-composite wall based on different shear span ratio was proposed.The error of calculation results was small is compared with test value,which satisfied the engineering precision.
引文
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[12]Xiangdong Tong,Jerome F Hajjar,Arturo E Schultz,et al.CyclicBehavior of Steel Frame Structures with Composite ReinforcedConcrete Infill Walls and Partially-Restrained Connections.Journalof Constructional Steel Research,2005(4):531-552.
[13]江见鲸.钢筋混凝土结构非线性有限元分析.西安:陕西科学技术出版社,1994:91-108.
[14]黄炜,姚谦峰,丁永刚,等.新型复合墙体的有限元建模技术研究.工业建筑,2005,35(11):43-46.
[15]DBJ/T61-43-2006陕西省《密肋壁板结构技术规程》[S].
[2]孟海,姚谦峰,黄炜.密肋复合墙体弹性刚度试验及计算分析[J].建筑科学与工程学报,2006,23:15-20.
[3]唐强,姚谦峰,黄炜,等.内填秸秆泥坯砖生态复合墙体抗震性能试验研究[C]∥全国第十届混凝土基本理论及工程应用学术会议论文集.2008:783-788.
[4]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001:59-98.
[5]Barbara Jones.Building with Straw Bales:A Practical Guide for UKand Irelan[M].Totnes,Devon,UK:Green Books Lid,2002:23-45.
[6]Catherine Wanek.The New Strawbale Home[M].Layto n,Utah,USA:Gibbs Smith,Publisher,2003:49-56.
[7]朱伯龙.结构抗震试验[M].北京:地震出版社,1989:78-125.
[8]姚谦峰,黄炜,田洁,等.密肋复合墙体受力机理及抗震性能试验研究[J].建筑结构学报,2004,25(6):67-74.
[9]Thomas N S,Georgios G P.Cyclic Load Behavior of Low-Slenderness RC Walls:Design Basis and Test Results[J].ACIStruct.J.,1996(4):649-660.
[10]LefasID,Mmbraseys,N N.Behavior of RC Structural Walls:Strength,Deformation Characteristics,and Failure Mechanism[J].ACI Struct.J.,1987(1):23-31.
[11]梁兴文,辛力,陶松平,等.混凝土剪力墙受剪承载力计算[J].建筑结构,2009(7):110-112.
[12]Xiangdong Tong,Jerome F Hajjar,Arturo E Schultz,et al.CyclicBehavior of Steel Frame Structures with Composite ReinforcedConcrete Infill Walls and Partially-Restrained Connections.Journalof Constructional Steel Research,2005(4):531-552.
[13]江见鲸.钢筋混凝土结构非线性有限元分析.西安:陕西科学技术出版社,1994:91-108.
[14]黄炜,姚谦峰,丁永刚,等.新型复合墙体的有限元建模技术研究.工业建筑,2005,35(11):43-46.
[15]DBJ/T61-43-2006陕西省《密肋壁板结构技术规程》[S].
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