局部设缝T形与L形截面短肢剪力墙抗震性能试验研究

Experimental research on seismic behavior of short shear walls of T-shaped and L-shaped cross section with local joint

分别对4片T形及4片L形截面短肢剪力墙试件,其中各有两片局部设缝,进行了低周水平反复加载试验,结果表明,传统不设缝试件的滞回曲线不对称,延性及耗能较差;局部设缝试件的滞回曲线大致呈对称分布,正反向加载滞回环面积大致相等,且明显大于不设缝试件,设缝试件的极限位移远大于传统不设缝试件,因而设缝试件延性耗能均较不设缝试件有明显提高。此外,局部设缝试件承载能力及其弹性等效刚度相对传统不设缝试件分别下降5%与6%左右,但能满足工程要求。

Based on the horizontal cyclic load tests on short shear walls of 4 T-shaped and 4 L-shaped cross sec- tions, which contain 2 walls with local joint respectively, the results indicate that the walls without local joint have asymmetric hysteretic curves, which ductility and energy dissipation are more poor. , hut the walls with local joint have symmetric hysteretic curves, the areas of hysteretic loop for positive loading and opposite loading are approximately equal, and the much greater than those of the walls without local joint. Moreover, the limiting displacements of the walls with local joint are much greater than those of the walls without local joint, which show that the ductility and energy dissipation of the walls with local joint are improved evidently than those of walls without local joint, In addition compared with the laters,the formers hearing capacities and elastic equivalent rigidities separately drop 5% and 6% ,which may meet request of engineering.