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[期刊论文]

Analytical model and design method of corrugated steel-concrete composite girders under torsion

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author:

Zhang, Hao (Zhang, Hao.) [1] | Zhao, Qiu (Zhao, Qiu.) [2] | Chen, Yiyan (Chen, Yiyan.) [3] | Unfold

Indexed by:

EI

Abstract:

The torsional effect of prestressed corrugated steel-concrete composite girders (PCSCCG) is more prominent due to its low torsional stiffness, which is therefore crucial to be clarified for safe design. This paper proposed a theoretical model based on the combined actions softened-membrane model (CA-SMM) to predict the torsional response of PCSCCG. The equilibrium, compatibility and constitutive equations were established to consider the characteristics of corrugated steel webs (CSW) and prestressing effect, where a reasonable shear strain assumption was presented to determine the force behavior of concrete slabs and CSW, and the thickness of shear flow in concrete slabs was corrected. An optimized algorithm using the gradient descent method was established to improve the insufficiency and stability. Based on this, a simplified design method was proposed to rapidly evaluate the torque and twist of PCSCCG. Finally, the feasibility of the proposed model and simplified design method was verified by available tests. The superiority of the analytical model in predicting the full torsional performance of PCSCCG was proved, and the reasonability and simplicity of the simplified method in capturing the cracking, yield, and ultimate torques and twists were observed. © 2024 Institution of Structural Engineers

Keyword:

Composite beams and girders Composite membranes Concrete beams and girders Concrete slabs Constitutive equations Gradient methods Prestressed beams and girders Prestressed concrete Shear strain Steel beams and girders Torsional stress Web Design

Community:

  • [ 1 ] [Zhang, Hao]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 2 ] [Zhao, Qiu]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 3 ] [Chen, Yiyan]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 4 ] [Fang, Xiaojun]Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
  • [ 5 ] [Fang, Xiaojun]Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Earthquake Engineering Research and Test Center, Guangzhou University, China
  • [ 6 ] [Yang, Zhaohui]School of Mechanical and Materials Engineering, Washington State University, Pullman; WA, United States
  • [ 7 ] [Yang, Xiaoqiang]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 8 ] [Yang, Xiaoqiang]Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

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Source :

Structures

Year: 2024

Volume: 70

3 . 9 0 0

JCR@2023

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

30 Days PV: 0

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Online/Total:104/10820011
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