Shear performance of steel and RPC composite deck with smooth plate shear connector(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年02期
- Page:
- 64-72
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Shear performance of steel and RPC composite deck with smooth plate shear connector
- Author(s):
- ZHAO Qiu; CAI Wen-ping; CHEN Bao-chun
- College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China
- Keywords:
- bridge engineering; composite deck; shear performance; RPC; smooth plate shear connector; finite element
- PACS:
- U448.38
- DOI:
- -
- Abstract:
- In order to solve the problem that longitudinal cracks were commonly produced in the present normal deck surfacing layer of steel bridge due to its weak lateral stiffness, this paper put forward a kind of smooth plate shear connector that can improve the lateral stiffness of deck by making steel bridge deck and RPC layer work together. To study the shear force transfer mechanism of this kind of shear connector in composite deck, nonlinear finite element models (FEM) of composite deck of push out tests were established. The failure modes, shear bearing capacity and load-slip curves of numerical models were verified by tests. The failure modes of smooth plate shear connector’s push-out specimens were obtained by combining finite element models and test results. The verified numerical simulation method, the influence of several parameters, such as thickness and strength of connector, and compressive strength of RPC with steel fabric or not, on shear capacity of steel and RPC composite deck with smooth plate shear connector was analyzed. The results show that the failure modes of smooth plate shear connector can be classified into two types including tensile failure of connector root and local compression failure of RPC below the shear connector. When compressive strengths of RPC are 80, 100, 120, 140 MPa, the reasonable thicknesses of corresponding smooth plate shear connector are 6, 8, 10, 12 mm respectively. The shear bearing capacity of composite bridge deck correspondingly increases with the increase of strength of smooth plate shear connector material and the increase range of thin steel plate connector is more significant than that in thick one. The shear bearing capacity of composite bridge deck also correspondingly increases with the increase of strength of RPC, while the increase range is not obvious when the thickness of steel plate connector is relatively small. Contribution of increasing steel fabric to bearing capacity and stiffness of composite deck is little, but it is extremely useful for improving shearing ductility of composite bridge deck.
Last Update: 2017-04-07