RC分体柱应用于柔性隔震层最佳剪跨比研究  

On the Optimal Shear Span Ratio of RC Split Columns Applied to Flexible Isolation Layers

作　　者：王松山[1] 刘方成[1] 

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2016年第3期1-7,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51108177);湖南省自然科学基金资助项目(10JJ4040);湖南工业大学研究生科研创新基金资助项目(CX1410)

摘　　要：为探究钢筋混凝土（RC）分体柱应用于柔性隔震层的最佳剪跨比，运用数值模拟对比研究整体柱和分体柱的延性系数、耗能系数和抗侧刚度。研究结果表明：分体柱与整体柱延性系数的比值随着剪跨比的增大而先增大后减小，且剪跨比在1．5～2．0范围内达到最大值；当A〈1．5时，分体柱与整体柱耗能系数比值随着剪跨比的增大而缓慢增大，但变化不明显，当A≥1．5时，比值迅速增大；分体柱与整体柱抗侧刚度的比值随着剪跨比的增大而增大，剪跨比越大，分体柱越不利于隔震。综合得出最佳剪跨比范围为1．5-2．0。In order to investigate the optimal shear span ratio of reinforced concrete （RC） columns applied to flexible isolation layers, a comparative analysis based on numerical simulation has been made of the ductility coefficient, the energy dissipation coefficient, and the lateral stiffness between monolithic columns and split columns. The results show that the ratios of the ductility coefficient between monolithic columns and split columns increase then decrease with the increase of its shear span ratios, with the maximum value of the latter achieved in the range of 1.5 to 2.0;when the shear span ratio is less than one point five, the ratios of the energy dissipation coefficient between monolithic columns and split columns increase slowly but not dramatically with the increase of its shear span ratios;when the shear span ratio is greater than or equal to one point five, the ratios of the energy dissipation coefficient between monolithic columns and split columns increase rapidly;the ratios of the lateral stiffness between monolithic columns and split columns increase with its shear span ratios, which are inversely proportional to the isolation effect. Thus, a final conclusion has been drawn：the optimal shear span ratio should be in the range of 1.5～2.0.

关 键 词：分体柱 剪跨比 延性系数 耗能系数 抗侧刚度 

分 类 号：TU311.3[建筑科学—结构工程]