|Table of Contents|

Failure mode analysis of hinged voided slab with gate-type steel rebars at bottom of junction surface(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2015年05期
Page:
15-25
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Failure mode analysis of hinged voided slab with gate-type steel rebars at bottom of junction surface
Author(s):
WU Qing-xiong CHEN Yue-chi CHEN Kang-ming
School of Civil Engineering, Fuzhou University, Fuzhou 350116, Fujian, China
Keywords:
bridge engineering hinged voided slab hinged joint structure gate-type steel rebar mechanical property full-scale model test nonlinear finite element
PACS:
U443.3
DOI:
-
Abstract:
Focused on the full-depth hinged joint with gate-type steel rebars at the bottom of junction surface between voided slab and hinged joint, a full-scale model with one span of 8 m according to the standard drawings of hinged voided slab bridge issued by Ministry of Transportation in 2007 was designed. With experiment and nonlinear finite element method, the failure modes of hinged voided slab under vehicle load were studied, including failure type, failure position and cracking load. Analysis result indicates that the nonlinear finite element model can properly simulate the mechanical properties of hinged voided slab under vehicle load by comparing with experimental result. The vertical relative slip is regarded as the index of cohesion failure of junction surface in three directions of bonding-slip relationship. Under vehicle load, the weakest position is the junction surface between voided slab and hinged joint. The surface starts to crack when the load reaches 69 kN(0.99 times of vehicle load), but the crack appears at the middle of voided slab when the load reaches 85 kN(1.21 times of vehicle load). Compared with the experiment on hinged voided slab with full-depth joint without gate-type steel rebars, when the gate-type steel rebars are laid at the bottom of junction surface, the cracking load increases unobvious, but the load that through cracks appear along the intersection between slab and hinged joint increases from 140 kN(2.00 times of vehicle load)to 199 kN(2.84 times of vehicle load), and through crack along longitudinal direction can be prevented. 4 tabs, 29 figs, 21 refs.

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Last Update: 2015-10-20