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为进一步改善高性能混凝土剪力墙的抗震性能,在6个带端柱高性能混凝土剪力墙试件中采用分段约束、相互嵌套的配箍方案;试件的剪跨比为1.0～2.1,轴压比为0.28～0.40,混凝土立方体抗压强度在89～99 MPa之间,横向约束箍筋采用极限强度为742 MPa的高强钢丝。对这6个试件进行了拟静力试验,观察了各试件的裂缝开展过程和破坏形态,分析了其滞回性能、承载能力、变形能力、刚度衰减和截面应变等。实测位移延性系数在3.75～5.20,耗能系数在0.76～1.13,表明采用横向分段约束嵌套的配箍方案有效地提高了带端柱高性能混凝土剪力墙的延性、变形和耗能能力等。根据试验结果,分别以侧移角和塑性铰转角作为性能指标,并给出了四个性能水平的性能指标限值。
In order to further improve the seismic performance of high-performance concrete shear walls, the hoisting scheme with six sections of high-performance concrete shear wall with end columns was used. The shear-span ratio of the specimens was 1.0 ~ 2.1, the axial compression ratio is 0.28 ~ 0.40, the compressive strength of concrete cubes is between 89 ~ 99 MPa, and the transverse confining stirrup adopts high strength steel wire with ultimate strength of 742 MPa. The six specimens were subjected to quasi-static test. Crack initiation and failure modes of each specimen were observed. Hysteresis properties, bearing capacity, deformation capacity, stiffness attenuation and cross-sectional strain were also analyzed. The measured displacement ductility coefficient is between 3.75 and 5.20 and the energy dissipation coefficient is between 0.76 and 1.13. It shows that the bifurcation scheme with transverse section constraint effectively improves the ductility, deformation and energy dissipation capacity of high performance concrete shear walls with end columns. Wait. According to the test results, the lateral displacement angle and the plastic hinge angle are respectively used as the performance indexes, and the performance index limits of the four performance levels are given.