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本文通过12个试件试验、电算和机理分析,对钢筋混凝土带翼墙短柱抗震性能进行研究。试验以剪跨比、轴压比和翼墙宽度为变参数,采用单调和低周往复两种方式施加水平荷载。电算采用三维实体单元,对弹性状态下这种柱的受力特点和变参数影响进行了分析。对试验中出现的各种破坏形态进行了机理分析,并建议了相应的水平极限承载能力计算公式及界限剪跨比。研究结果表明:翼墙充分参加工作,改变了柱的受力与破坏形态,使柱的承载能力提高,变形能力降低;电算、公式计算和试验结果符合良好。
In this paper, the seismic performance of reinforced concrete wing-walled short columns is studied through 12 test specimens, electrical calculation and mechanism analysis. The test uses shear-span ratio, axial compression ratio and wing wall width as variable parameters, and applies horizontal loads in monotonous and low-cycle reciprocating manners. The 3D solid element is used in the calculation to analyze the influence of the force characteristics and variable parameters of this column in the elastic state. The mechanism of various failure modes in the test was analyzed, and the corresponding formulas for the horizontal ultimate load carrying capacity and the limit shear ratio were proposed. The research results show that the wing wall fully participates in the work and changes the force and failure form of the column, which improves the carrying capacity of the column and reduces the deformability. The calculations of electric calculations, formulas and test results are in good agreement.