钢筋粉煤灰陶粒砼剪力墙受力性能的试验研究

Experimental Study on Behavior of Reinforced Ash Ceramsite Concrete Shear Walls

本文通过七个粉煤灰陶粒砼和一个普通砼单片剪力墙的试验，研究了在低周反复荷载作用下轻骨料砼剪力墙的强度和变形性能，并与同类普通砼剪力墙进行了比较和分析。试验表明，粉煤灰陶粒砼剪力墙的受力性能和破坏形态与普通砼剪力墙相似，在相同的结构条件下，通过提高砼强度等级和纵向及横向配筋率，其能量耗散能力和延性优于普通砼剪力墙。在试验的基础上，建立了界限剪跨比的判别式，强度控制区的划分条件，提出了抗剪强度计算方法。建议方法的计算值与本次试验及国内外其它资料的结果有较好的符合程度。本文还研究了剪力墙抗剪强度问题，并对剪力墙位移计算和控制，达到极限时的刚度退化率提出了看法。

Through the experiments of seven ash ceramsite concrete shearwalls and one normal concrete shear wall, this paper studies thestrength and deformation behavior of lightweight concrete shearwalls under low frequency cyclic loading. This behavior is compared with that of normal concrete shear walls.The experiments showthat the behavior of lightweight concrete shear walls under loading and its collapse mode are similar to those of the normal concrete ones. Under the same structural conditions, their energydissipation capacity and ductility are better than those of normalconcrete shear walls provided that the concrete grade as well asthe longitudinal and transverse reinforcement ratio have beenincreased. Based on the experiments, the discriminating formulasfor balanced shear span ratio and the condition of dividing strengthcontrol zone are derived, and the method for calculating shearstrength is suggested. The calculated values of the suggestedmethod agree well with the results of the experiments and thoseavailable data at home and abroad.This paper also studies the problems of the shear strength of these walls and presents ideas onthe calculation and control of their horizontal deformation as wellas the stiffness degradation at the stage of ultimate strength.