带暗柱钢筋砼等肢L形柱轴压比限值调整系数研究

至今,带暗柱的等肢L形柱轴压比限值调整系数尚未得到充分研究,因而限制了其在工程中的应用.为此,针对等肢L形柱,采用非线性全过程数值分析方法,通过C++编制程序,并使用相关实验数据对程序进行了验证；在不同抗震等级、肢高纵筋配筋率及体积配箍率下,计算了带暗柱与不带暗柱钢筋混凝土等肢L形柱的截面曲率延性比,并根据《混凝土异形柱结构技术规程》给出的不同抗震等级下异形柱截面曲率延性比的要求,确定了各抗震等级下带暗柱与不带暗柱的等肢L形柱的轴压比限值及其比值；最后通过拟合分析法及调整系数法确定了带暗柱等肢L形柱轴压比限值的调整系数.

Study on adjustment coefficient of limit value of axial compression ratio of R C equi-limb L-shaped columns with concealed column

How to adjust the limit value of axial compression ratio of the equi-limb L-shaped column with concealed column has not been researched adequately,so that it affects the engineering application.Based on the method of the nonlinear analysis of complete response process,programming with C++ program were done and varified by related experimental data;and cross-section curvature ductility ratios of equi-limb L-shaped column with and without concealed column for different seismic grades and limb height conditions were calculated;according to curvature ductility ratio demand of each seismic resistance grade in "Technical Specification for Concrete Structures with Specially Shaped Column",the ratios of limit value of L-shaped column with and without the concealed column were calculated;finally the adjustment coefficients of limit value of axial compression ratio of equi-limb L-shaped columns with concealed column were determined through regression analysis and the adjustment coefficient method.