基于钢筋拉压力传递的预制空心板残余抗震性能研究

Residual seismic behavior of precast hollow slabs based on reinforcement tension and pressure transfer

为提升建筑质量,分析在循环往复荷载作用下预制空心板整体抗震性能,研究基于钢筋拉\,压应力传递的预制空心板残余抗震性能。制备不含钢筋预制空心板结构试件:不含钢筋试件、未使用钢筋拉压力传递间接搭接试件、使用钢筋拉\,压应力传递灌孔构造边缘构建试件,对各试件循环施加地震荷载,记录各试件性能变化情况。试验结果表明,相比于压剪破坏的预制空心板,压弯破坏的预制空心板的滞回曲线更加饱满,承载力安全裕度和抗震承载力均较高,在名义屈服点之前变化相似。在循环往复荷载作用下,各试件屈曲刚度与峰值刚度分别只有原始刚度的50%和20%,但使用钢筋拉\,压应力传递灌孔构造边缘构建试件的刚度退化最小,且具有钢筋拉压力传递灌孔构造边缘构建试件的残余变形分布和残余抗震性能较好。

To improve the building quality and analyze the overall seismic performance of precast hollow slabs under cyclic loading,the residual seismic performance of precast hollow slabs based on reinforcement tension and pressure transfer was studied.Different types of test pieces of the precast hollow slab without reinforcement were prepared,and the performance changes of each test piece were recorded under cyclic loading.The test results showed that,compared with the precast hollow slab with shear-compression failure,the hysteresis curve of the precast hollow slab with compression bending failure is fuller,and the safety margin of bearing capacity and seismic bearing capacity are higher.Under cyclic loading,the buckling stiffness and peak stiffness of each specimen are only 50%and 20%of the original stiffness,respectively.However,the stiffness degradation of the specimen with reinforcement tension and pressure transfer and prefabricated boundary elements is the smallest,and its residual deformation distribution and residual seismic performance are better.