Experimental study on flexural performance of steel-UHTCC composite bridge decks considering different shear connection degrees

被引：22
作者：
Tong, Jing-Zhong [1 ]
Chen, Yun-Long [1 ]
Li, Qing-Hua [1 ]
Xu, Shi-Lang [1 ]
Zeng, Tian [1 ]
Gao, Wei [2 ]
机构：
[1] Zhejiang Univ, Inst Adv Engn Struct, Hangzhou 310058, Peoples R China
[2] Univ New South Wales, Sch Civil & Environm Engn, Syaney, NSW 2052, Australia
来源：
ENGINEERING STRUCTURES | 2023年 / 281卷
基金：
中国国家自然科学基金;
关键词：
Composite bridge deck; Ultra-high toughness cementitious composite; Flexural performance p   Shear connection degree; Experimental study; Theoretical formula; STRESSES; CRACKING; BEAMS;
D O I：
10.1016/j.engstruct.2023.115738
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Traditional steel-concrete composite bridge deck (CBD) is prone to crack in the concrete layer, which reduces its flexural capacity and durability. Due to the excellent crack resistance behavior and characteristic of tensile strain hardening, ultra-high toughness cementitious composite (UHTCC) has become a promising material to solve this problem. In this study, the flexural performance of bridge decks composed of steel and UHTCC using shear studs is analyzed by means of experimental research and finite element (FE) analysis. Five steel-UHTCC CBDs with different shear connection degrees and rib dimensions were fabricated and tested. Then, FE models of steel-UHTCC CBDs were established by ABAQUS, involving FE examples for comparing with the tests and 10 groups of models to conduct a parametric study. The flexural resistant performance of steel-UHTCC CBDs was studied concerning the key design parameters, including stud number, span length, rib dimension, thickness of UHTCC and longitudinal reinforcement ratio. The effect of shear connection degree on the flexural resistance of CBDs was discussed in detail. Finally, a modified theoretical formula was proposed for predicting the flexural resistance of steel-UHTCC CBDs.
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页数：14
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