Fatigue Behavior and Design Layout Method of Welded Stud Connectors in Steel-UHPC Composite Bridge Deck

被引：0
|
作者：
Shi Z.-C. [1 ]
Su Q.-T. [1 ,2 ]
Chen L. [3 ]
机构：
[1] School of Civil Engineering, Tongji University, Shanghai
[2] Shanghai Engineering Research Center of High Performance Composite Bridges, Shanghai
[3] Shanghai Municipal Engineering Design Institute(Group) Co. Ltd., Shanghai
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2023年 / 36卷 / 06期
关键词：
bridge engineering; full-scale fatigue test; S-N curves; steel-UHPC composite bridge deck; stud connectors;
D O I：
10.19721/j.cnki.1001-7372.2023.06.010
中图分类号：
学科分类号：
摘要：
The welded stud connectors in steel and ultrahigh-performance concrete (UHPC) composite bridge decks play a critical role in making the UHPC layer help the orthotropic steel deck (OSD) bear the force and relieve the fatigue cracking of the OSD. To investigate the fatigue behavior of stud connectors in a composite bridge deck, a fatigue beam test of a full-scale steel-UHPC composite bridge deck was conducted, and the relevant fatigue failure modes of the stud connectors were revealed. Based on the fatigue beam test results, the linear regression method and the method of maximum-likelihood estimation (MLE) considering run-outs were used to establish shear S-N curves of stud connectors, and the beam test S-N curves were compared with those of the push-out test. The difference between the stud S-N curves of existing design codes and those of this test was examined. Considering the influence of the concrete type on the fatigue behavior of stud connectors, the unified shear S-N curve was established to quantify the influence. The test results show that fatigue failure is located around the heat-affected zone of the stud-steel-deck-plate weld. The fatigue failure modes are not influenced by concrete materials, fatigue test methods (the beam or the push-out test) and geometry sizes of studs. The S-N curves with 95% survival probability established by MLE are slightly higher than those obtained by the linear regression method, and the corresponding shear fatigue strengths at 2 million cycles are 162 and 158 MPa, which are significantly larger than those of the fatigue push-out test. The existing design codes are more conservative regarding the design of stud connectors in steel-UHPC composite bridge decks. Based on the unified shear S-N curve of the stud connectors, the deviation of the derived shear fatigue strength at 2 million cycles from the test value is within 10%, indicating that the curve has good accuracy. A design layout method of the stud connectors used in composite bridge decks is proposed based on satisfying the two control conditions of combined action and antifatigue performance. The design method considers the geometric properties of the U-rib, crossbeam spacing and the material properties of the concrete. Finally, a related calculation case is presented. © 2023 Xi'an Highway University. All rights reserved.
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页码：107 / 122
页数：15
相关论文
共 41 条
  • [1] HUANG Wei, Design of deck pavement for long-span steel bridges [J], China Civil Engineering Journal, 40, 9, pp. 65-77, (2007)
  • [2] ZHANG Qing-hua, BU Yi-zhi, LI Qiao, Review on fatigue problems of orthotropic steel bridge deck [J], China Journal of Highway and Transport, 30, 3, pp. 14-30, (2017)
  • [3] BUITELAAR P, BRAAM R, KAPTIJN N., Reinforced high performance concrete overlay system for rehabilitation and strengthening of orthotropic steel bridge decks, Orthotropic Bridge Conference, pp. 384-401, (2004)
  • [4] SHAO Xu-dong, CAO Jun-hui, YI Du-tao, Et al., Research on basic performance of composite bridge deck system with orthotropic steel deck and thin RPC layer [J], China Journal of Highway and Transport, 25, 2, pp. 40-45, (2012)
  • [5] DIENG L, MARCHAND P, GOMES F, Et al., Use of UHPFRC overlay to reduce stresses in orthotropic steel decks, Journal of Constructional Steel Research, 89, pp. 30-41, (2013)
  • [6] ZHANG Shi-hong, Basic Performance of a lightweight composite bridge deck with open ribs [D], (2016)
  • [7] CAO J, SHAO X, DENG L, Et al., Static and fatigue behavior of short-headed studs embedded in a thin ultrahigh-performance concrete layer [J], Journal of Bridge Engineering, 22, 5, (2017)
  • [8] SPINDEL J E, HAIBACH E., The method of maximum likelihood applied to the statistical analysis of fatigue data, International Journal of Fatigue, 1, 2, pp. 81-88, (1979)
  • [9] HOBBACHER A F., Recommendations for fatigue design of welded joints and components, (2016)
  • [10] SU Qing-tian, TIAN Le, ZENG Ming-gen, Et al., Research on basic performance of composite bridge decks with orthotropic corrugated steel plates and concrete, Engineering Mechanics, 33, pp. 138-142, (2016)
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