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 wail 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.
出处
《工业建筑》
CSCD
北大核心
2012年第8期12-17,共6页
Industrial Construction
基金
国家自然科学基金项目(50908188
51178385)
国家"十二五"科技支撑项目(20012BAJ16B02)
陕西省教育厅自然科学专项基金项目(11JK0940
2010JK622
12JK0908)
陕西省重点学科建设专项资金资助项目(E01001
E01003)
国家"973"计划资助项目(2012CB723302)
长江学者和创新团队计划资助
关键词
生态复合墙体
秸秆泥坯砌块
剪跨比
抗震性能
受剪承载力
eco-composite wall
straw mud billet block
shear span ratio
seismic performance
shear capacity