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Steel and Composite Structures
  Volume 38, Number 4, February25021, pages 365-380
DOI: http://dx.doi.org/10.12989/scs.2021.38.4.365
 


Static behavior of bolt connected steel-concrete composite beam without post-cast zone
Ying Xing, Yun Zhao, Qi Guo, Jin-feng Jiao, Qing-wei Chen and Ben-zhao Fu

 
Abstract
    Although traditional steel-concrete composite beams have excellent structural characteristics, it cannot meet the requirement of quick assembly and repair in the engineering. This paper presents a study on static behavior of bolt connected steel-concrete composite beam without post-cast zone. A three-dimensional finite element model was developed with its accuracy and reliability validated by available experimental results. The analysis results show that in the normal service stage, the bolt is basically in the state of unidirectional stress with the loss of pretightening can be ignored. Parametric studies are presented to quantify the effects of the post-cast zone, size and position of splicing gap on the behavior of the beam. Based on the studies, suggested size of gap and installation order were proposed. It is also confirmed that optimized concrete slab in mid-span can reduce the requirement of construction accuracy.
 
Key Words
    high-strength frictional bolt; steel-concrete composite beam; post-cast zone; prefabricated construction
 
Address
Ying Xing: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
College of Civil Engineering, Hunan University, Changsha 410082, China
Yun Zhao, Qi Guo and Jin-feng Jiao: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Qing-wei Chen: Economic & Technology Research Institute of State Grid Shandong Electric Power Company, Jinan 250021, China
Ben-zhao Fu: State GRID Fujian Economic Research Institute, Fuzhou 350000, China
 

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