Test and finite element analysis on bending performance of UHPC Waffle deck panel(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年03期
- Page:
- 52-63
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Test and finite element analysis on bending performance of UHPC Waffle deck panel
- Author(s):
- SHAO Xudong; LI Yuqi; LIAO Zinan; CAO Junhui
- （1. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China； 2. Changsha Planning & Design Institute Co., Ltd., Changsha 410007, Hunan, China）
- Keywords:
- bridge engineering; Waffle deck panel; static bending test; finite element simulation; parametric analysis
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the transversal bending performance of UHPC Waffle deck panel, four specimens with transverse rib in full scale were firstly carried out for bending performance static test. Then nonlinear finite element models of specimens were established by using the finite element software ABAQUS, in which the material nonlinearity, geometric nonlinearity and plastic damage model of concrete for UHPC were considered, and the whole test process was simulated by using the finite element model. Finally, the influence of primary parameters on the transversal bending performance of UHPC Waffle deck panel was ascertained by parameter analysis, which included the longitudinal reinforcement ratio of transverse rib (the diameter of reinforcement), the height of transverse rib, the height of top plane and the spacing of transverse rib. The results show that specimens undergo following typical stages under the action of positive bending moment, linear elastic stage, crackdeveloping stage and yield stage. Transversal cracks appear at the bottom of transverse rib, which lead to the first decrease of structural stiffness. With the development of cracks, the redistribution of internal forces results in a continuous rise of stress in the reinforcement until its yielding, which causes a second drop of stiffness. Then cracks propagates further upward to the bottom of flange, because the tensile zone develops to the extreme point leading the upper reinforcement to yield, the stiffness of specimen decreases rapidly, which is the third decline of stiffness. The bearing capacity of specimen is close to the extreme and tends to be destroyed. The finite element results are consistent with those from experiments. Parameter analysis shows that the influence of the longitudinal reinforcement ratio (the diameter of reinforcement) on the initial cracking load is negligible, whereas the development of cracks can be restricted effectively. The increase of rib height can not only show some inhibitory effect on the initial cracking load, but also can enhance the initial stiffness, the stiffness after cracking and the ultimate bearing capacity of Tbeam. Increasing the height of top plane could also achieve a similar effect, but improvement efficiency of initial stiffness by increasing the rib height is 5.4 times of that by increasing the top plane height. The increase of rib spacing can improve initial stiffness, the stiffness after cracking as well as ultimate bearing capacity of a single transversal rib, but the global stiffness in transversal direction is impaired. 8 tabs, 19 figs, 26 refs.
Last Update: 2018-06-13