Experiment on mechanical property of PBL connector for large diameter concrete dowel(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年01期
- Page:
- 67-75
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Experiment on mechanical property of PBL connector for large diameter concrete dowel
- Author(s):
- HAN Xing; WANG Xue-wei; ZHU Bing; XIE Ming-zhi
- 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Department of Civil Engineering, Southwest Jiaotong University-Emei Campus, Emeishan 614202, Sichuan, China
- Keywords:
- bridge engineering; mechanical property; push-out test; PBL connector; large diameter concrete dowel; failure mode; failure mechanism; influence factor
- PACS:
- U448.38
- DOI:
- -
- Abstract:
- PBL connectors are widely used in steel-concrete composite bridges as a kind of main loadtransferring component. In order to reveal the mechanical properties of PBL connectors for large diameter concrete dowel, push-out tests with 24 specimens in 8 groups were carried out. Failure modes and failure mechanisms of PBL connectors were analyzed according to the interior failure modes of these specimens, influence factors of bearing capacity and anti-slip property of PBL connectors were investigated, and mechanical properties of PBL connectors for different diameter concrete dowels were analyzed from three aspects of load-slip curve feature, shear stiffness, and ductility performance, respectively. The results show that there are three main failure modes of PBL connectors of large diameter concrete dowel, shear failure of transverse reinforcement, compression failure of concrete in the hole, and shear failure of perforated rib. Diameter of transverse reinforcement, thickness and failure mode of perforated rib are the important influence factors of anti-slip property of PBL connectors while perforated rib diameter has insignificant influence on anti-slip performance of PBL connectors. Diameter of transverse reinforcement, thickness and diameter of perforated rib are the important influence factors of ultimate bearing capacity of PBL connectors. Among the PBL connectors for large diameter concrete dowel, the mechanical properties of PBL connectors with perforated rib diameter of 75 mm are superior to those of 60 mm, and the mechanical properties of PBL connectors with perforated rib diameter of 90 mm are superior to those of 75 mm. The results provide theoretical basis for engineering application of large diameter concrete dowel PBL connectors.
Last Update: 2017-01-22