|Table of Contents|

Mechanical behavior of HFRC bridge deck for composite bridge(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2023年2期
Page:
80-88
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Mechanical behavior of HFRC bridge deck for composite bridge
Author(s):
HE Yu-liang1;  LIU Jia-meng1;  CAO Xin-yu1;  YING Sen-yuan2;  YANG Ying1;  XIANG Yi-qiang3
(1. School of Civil Engineering, Shaoxing University, Shaoxing 312000, Zhejiang, China; 2. Zhejiang Zhongqingda Construction Industry Co., LTD, Shaoxing 312000, Zhejiang, China; 3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China)
Keywords:
bridge engineering;  HFRC;  bridge deck;  experiment;  numerical stimulation;  capacity
PACS:
U441
DOI:
10.19721/j.cnki.1671-8879.2023.02.008
Abstract:
In order to solve the problem that the reinforced concrete bridge panel was easy to crack under the action of load, which made it difficult to replace the bridge panel in concrete, a new hybrid fiber concrete(HFRC)composite beam bridge panel was proposed. First, four test specimens(2 HFRC specimens, 2 ordinary concrete specimens)were designed and tested under monotonic and cyclic loading, the mechanical properties of the bridge deck were analyzed from the failure mode, crack development, load-deflection and load-strain. Then the standard finite element model was set up considering the constitution relationship of HFRC, and the effects of different dosages(volume fraction, the same below)steel fiber(0%, 0.5%, 1% and 1.5%)and polypropylene fiber(0%, 0.05%, 0.1% and 0.15%)on the static properties of bridge deck were studied. Finally, according to the experimental and numerical results, based on the existing specification of the formula of reinforced concrete slab shear bearing capacity, fiber characteristic values were introduced, the calculation method of bearing capacity of HFRC bridge deck was proposed based on the specifications. The results show that the fiber not only increases the bearing capacity of the bridge deck under monotonic and cyclic loading by 9% and 6%, but also plays an effective role in strengthening, toughening and crack resistance. The capacity and crack resistance of bridge deck are improved with the increasing of steel fiber content, however the amount of polypropylene fiber has little effect on the improvement of the cracking load and ultimate bearing capacity of the bridge deck, but it can improve the ductility of the bridge deck. The combination of polypropylene fiber and steel fiber can improve the bearing capacity, stiffness and toughness of the bridge panel after buckling. The calculation method can provide a reference for the design of HFRC bridge deck.5 tabs, 13 figs, 24 refs.

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Last Update: 2023-03-30