钢筋混凝土剪力墙抗震恢复力模型及试验研究

通过拟静力试验,对9片钢筋混凝土剪力墙分别进行了在周期反复荷载作用下受力性能的研究,验证了本文提出的钢筋混凝土剪力墙的多弹簧宏观有限元模型,进而得到了荷载与位移关系更合理的本构模型,给出了相应的计算公式。通过比较不同轴压比和不同剪跨比的剪力墙的破坏形态、破坏程度,以及对试验现象和滞回曲线的分析,得到如下结论:随着轴压比在一定范围内的提高,相同剪跨比的剪力墙其承载能力有一定程度的提高,但墙体的延性下降,强度退化和刚度退化趋于严重。随着剪跨比的提高,相同轴压比的试件破坏形态由剪切破坏向弯曲破坏过渡,承载能力随之降低,但试件的延性提高,耗能能力大大加强。

Experimental study on seismic restoring performance of reinforced concrete shear walls

Quasi-static test of nine reinforced concrete shear walls had bee n carried out under cyclic lateral loading. The relationship between force and dis placement was obtained so that the multispring macro-finite element model for R C shear wall presented in this paper was verified. The corresponding formulation s for this model were given. Through comparing the destructed behavior and damag e grades of the walls under different axial compression ratios and shear span ra tios based on the analysis of test and hysteresis loop, it can be concluded as f ollows: with the increasing of axial compression ratio to some range, the bearin g capacity of shear wall will increase if the shear span ratio of shear walls ar e the same, but the ductility of walls will decrease, and the degradation of str ength and stiffness will be more serious. At the same time, with the increasing of shear span ratio, the destructed behavior of shear walls will be transited fr om shear wreck to flexure wreck. The bearing capacity will reduce, while the duc tility and capability of consuming energy of shear walls will be strengthened.