涂覆钢筋陶粒混凝土梁延性及耗能性能的试验研究

Experimental Study on the Ductility and Energy Consumption of Reinforced Shale Ceramsite Concrete Beams

通过8根涂覆钢筋页岩陶粒混凝土梁的低周往复荷载试验,得到了涂覆钢筋页岩陶粒混凝土梁在低周往复荷载作用下的裂缝分布、破坏形态及滞回曲线、骨架曲线、位移延性系数和屈服荷载、极限荷载作用下的等效黏滞阻尼系数。研究了配筋率、翼缘宽度及剪跨比3个因素对涂覆钢筋页岩陶粒混凝土梁延性及耗能的影响。结果表明,涂覆钢筋页岩陶粒混凝土梁的滞回曲线饱满,梁的位移延性系数均大于3;等效黏滞阻尼系数的计算表明涂覆钢筋页岩陶粒混凝土梁均有良好的耗能性能。

Through the low cyclic loading tests of 8 Shale ceramsite concrete beams reinforced with coated bars,the crack distribution,failure mode and hysteretic curve,skeleton curve,displacement ductility coefficient and yield load,limit load under the equivalent viscous damping coefficients of Shale ceramsite concrete beams reinforced with coated bars under cyclic load were obtained.The influences of three factors,such as reinforcement ratio,flange width and shear span ratio,on ductility and energy dissipation of Shale ceramsite concrete beams reinforced with coated bars were studied.The experimental results show that the hysteretic curve of Shale ceramsite concrete beams reinforced with coated bars is plump,and the displacement ductility coefficient of the beam is greater than three.The calculation of equivalent viscous damping coefficient shows that the shale ceramsite concrete beams reinforced with coated bars have good energy dissipation performance.