Mechanical performance of the mixed post-installed connection in low-strength concrete

作者：Wang Yongquan; Chen Tianjiao; Jing Jian

来源：Journal of Southeast University (english Edition), 2017, 33(2): 203-208.

DOI：10.3969/j.issn.1003-7985.2017.02.013

• Concrete failure
• Failure patterns
• Grouting materials
• Joint performance
• Low strength concrete
• Mechanical performance
• Post-installed connection
• Steel bars

Due to inadequate bearing capacity of the chemically-planted steel bar in low-strength concrete, a new mixed post-installed connection is proposed using small diameter anchoring steel bars and grouting materials together to anchor the main steel bar. To investigate the feasibility of the proposed post-installed connections, a series of pull-out tests with different anchors were conducted for comparison, including fully adhesive anchors, partially adhesive anchors, grouting material anchoring connection and the new mixed post-installed connection. The experimental results of the single steel bar pull-out test show that the mixed post-installed connection can effectively enhance the bearing capacity of post-installed steel bars in low-strength concrete. The bearing capacity is increased by nearly two times with no cone-type concrete failure compared with the fully adhesive anchor. The results show that adopting the new mixed post-installed connection can ensure that joint performance meets the requirements if the space dimension is available.

• 出版日期2017
• 单位河海大学