轴压比影响LC结构剪力墙抗剪强度的软化桁架模型分析
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摘要
实际工程中,轻骨料混凝土(LC)剪力墙的轴压比在抗震设计中对其抗剪强度和延性性能有着直接的影响。为使设计规程具有足够的理论依据,在六榀轻骨料混凝土剪力墙试件的试验与相关研究的基础上,研究了在低周反复荷载作用下,着重考虑不同轴压比对中等高度有边框剪力墙的斜截面抗剪强度的影响效应,并利用软化桁架模型,建立剪切问题控制方程组,进行了理论分析和预测,所得结果与测试数据符合良好。
For practical reasons,the axial compression ratio is considered to be a critical factor in light-weight concrete shear wall design relating to the shear strength as well as the ductility.According to the experiment and relevant research,the shear strength and failure mode of mid-rise light-weight concrete shear walls under cyclic loads,especially under different axial loads,were analyzed.By using a softened truss model,satisfactory agreement between theoretical results and experimental ones is achieved so as to present an approach for those designers.
For practical reasons,the axial compression ratio is considered to be a critical factor in light-weight concrete shear wall design relating to the shear strength as well as the ductility.According to the experiment and relevant research,the shear strength and failure mode of mid-rise light-weight concrete shear walls under cyclic loads,especially under different axial loads,were analyzed.By using a softened truss model,satisfactory agreement between theoretical results and experimental ones is achieved so as to present an approach for those designers.
引文
[1]GB50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[2]汪明栋,王铁成,于庆荣,等.轴压比对中等高度LC结构剪力墙抗震性能的影响[J].地震工程与工程振动,2006,26(4):96-100.
[3]孙晔,敖清.轴压比对中等高度轻砼有边框剪力墙抗震性能的影响效应[J].山东水利科技,1996(2):52-57.
[4]HSU T T C,MO Y L.Softening of concrete in low-riseshear walls[J].Journal of the American ConcreteInstitute,1985,82(6):883-889.
[2]汪明栋,王铁成,于庆荣,等.轴压比对中等高度LC结构剪力墙抗震性能的影响[J].地震工程与工程振动,2006,26(4):96-100.
[3]孙晔,敖清.轴压比对中等高度轻砼有边框剪力墙抗震性能的影响效应[J].山东水利科技,1996(2):52-57.
[4]HSU T T C,MO Y L.Softening of concrete in low-riseshear walls[J].Journal of the American ConcreteInstitute,1985,82(6):883-889.
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