梁端化学植筋加固钢筋锚固失效研究

Study on failure of anchorage at beam-end strengthened by chemical bonded rebars

首先设计制作了4个试件,其中1个为对比试件,3个为化学植筋加固试件,3个加固构件分别以不同锚固方式加固梁端负弯矩区域;然后对4个试件施加低周期往复荷载作用。通过试验现象及数据分析了化学植筋加固构件锚固失效的性能。结果表明,化学植筋能满足构件单次拉拔至构件屈服前不发生破坏;构件屈服后至极限承载力阶段,随着加载级数的提高及循环次数的增加,部分锚固钢筋被拔出。

This article firstly designs four specimens, including a contratest specimen and three chemical anchorage reinforcement specimens which reinforcing the beam ends in different ways and then applies low-cycle reciprocal load to the four specimens. The article analyzes the anchor failure performance of the anchorage specimens by test phenomena and data. The results show that the chemical anchorage can meet the component single drawing to com- ponents yield without any break down. With the increasing of the loading level and the cycles number, the parts of the anchor bars would be pulled out.