【摘要】 通过对12根剪跨比λ=2.0的超高强混凝土短柱在低周反复荷载下抗震性能的试验研究,分析了其破坏形态,并研究了轴压比和配箍率对试件滞回特性和抗震延性的影响,提出了满足一定延性要求(μΔ≥3.0)超高强混凝土短柱的轴压比限值和箍筋加密区的最小配箍特征值的建议值。该值可为现行规范的修订提供参考。更多还原

【Abstract】 The test research of 12 ultra high-strength concrete short columns(λ=2.0) subjected to low cyclic reversed lateral loads in seismic performance was carried out.The experimental results show that the main failure pattern of the specimens is shear failure.Then,the axial compression ratio and stirrup ratio about the ductility of ultrahigh-strength concrete short columns are discussed.Finally,the suggested values of the axial compression ratio and stirrup minimum characteristics value are obtained from the test results,which meet the requirements of ductility.It is concluded that the suggested values could provide the reference for amending the current Chinese design code of concrete structures.更多还原