新型分体柱受剪性能试验研究

Experimental Study on Shear Behaviors of a New Typed Split Column

设计制作了以竹胶板为隔板的新型分体柱.通过对新型分体柱进行恒定轴力作用下的拟静力试验,研究了新型分体柱的破坏过程和破坏形态,对比分析了新型分体柱与普通钢筋混凝土短柱的性能差异.结果表明:新型分体柱在一定程度上解决了加载后期石膏隔板易被压碎导致传统分体柱整体性下降的问题;竹胶板隔板使新型分体柱由整截面受力柱演变为4个协同工作的单元柱,阻止了对角斜裂缝的出现,避免了脆性破坏;新型分体柱的延性系数为11.34,远大于普通钢筋混凝土柱,具有良好的延性.

A new typed split column with bamboo plywood clapboard is made and designed in this paper. To study the failure process and mode, the new typed column is quasi-statically tested under low cyclic lateral loading and the mechanical performance difference between reinforced concrete short column and new typed split column is ana- lyzed. To some extent, it solves the problem of uncompleteness of the traditional split columns that results from del- icate gypsum clapboard in the later part of loading. The bamboo plywood clapboard makes the new type split col- umn evolve from the integral cross-section reinforced column into the four cooperative working elemental column, preventing the emergence of diagonal crack and avoiding brittle failure. Besides, the new type split column has a good ductility with the displacement ductility factor of 11.34, much higher than that of reinforced concrete short column.