论文部分内容阅读
进行了混凝土植筋在落锤冲击荷载作用后的粘结锚固性能试验。试件按植筋深度的不同分为4组,每组试件分别进行了静力拉拔试验和5种冲击加载工况试验,冲击荷载峰值为同组试件静力极限拉拔力的0.6~1.5倍,试件在承受冲击力作用后再进行静力拉拔试验。结果表明,植筋深度小于临界锚固长度的试件,承受较大冲击荷载后试件的承载力即完全丧失,承受较小冲击荷载后试件的承载力虽未完全丧失,但延性大幅度降低;对于植筋深度相当于临界锚固长度的试件,承受冲击荷载后试件仍有较大的抗拉拔承载力,但延性降低较大;当植筋深度大于临界锚固长度时,试件在承受冲击荷载后仍有良好的抗拉拔承载力和延性。
The anchorage performance of concrete rebars after dropping hammer impact load was tested. The specimens were divided into 4 groups according to the depth of planting bar. Each group of specimens were subjected to static pull test and 5 kinds of impact loading test respectively. The peak value of impact load was 0.6 ~ 1.5 times, after the specimen under the impact of the impact of static drawing test. The results show that the specimens with less than the critical anchorage length of the anchorage tend to lose their bearing capacity after being subjected to a large impact load. The bearing capacity of the specimens with less impact load is not completely lost but the ductility is greatly reduced For specimens with implant anchorage depth equal to the critical anchorage length, the specimens still have greater tensile bearing capacity under impact load, but the ductility is greatly reduced. When the anchorage depth is greater than the critical anchorage length, After bearing the impact load is still good tensile bearing capacity and ductility.