Structural Engineering and Mechanics

  • 제74권1호
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  • Pages.1-18
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Vector mechanics-based simulation of large deformation behavior in RC shear walls using planar four-node elements

  • Zhang, Hongmei (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Shan, Yufei (Department of Disaster Mitigation for Structures, Tongji University) ;
  • Duan, Yuanfeng (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Yun, Chung Bang (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Liu, Song (Department of Disaster Mitigation for Structures, Tongji University)
  • 투고 : 2018.09.13
  • 심사 : 2019.08.26
  • 발행 : 2020.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

For the large deformation of shear walls under vertical and horizontal loads, there are difficulties in obtaining accurate simulation results using the response analysis method, even with fine mesh elements. Furthermore, concrete material nonlinearity, stiffness degradation, concrete cracking and crushing, and steel bar damage may occur during the large deformation of reinforced concrete (RC) shear walls. Matrix operations that are involved in nonlinear analysis using the traditional finite-element method (FEM) may also result in flaws, and may thus lead to serious errors. To solve these problems, a planar four-node element was developed based on vector mechanics. Owing to particle-based formulation along the path element, the method does not require repeated constructions of a global stiffness matrix for the nonlinear behavior of the structure. The nonlinear concrete constitutive model and bilinear steel material model are integrated with the developed element, to ensure that large deformation and damage behavior can be addressed. For verification, simulation analyses were performed to obtain experimental results on an RC shear wall subjected to a monotonically increasing lateral load with a constant vertical load. To appropriately evaluate the parameters, investigations were conducted on the loading speed, meshing dimension, and the damping factor, because vector mechanics is based on the equation of motion. The static problem was then verified to obtain a stable solution by employing a balanced equation of motion. Using the parameters obtained, the simulated pushover response, including the bearing capacity, deformation ability, curvature development, and energy dissipation, were found to be in accordance with the experimental observation. This study demonstrated the potential of the developed planar element for simulating the entire process of large deformation and damage behavior in RC shear walls.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (51578419, U1709216 and 51522811) and the National Key R&D Program of China (2018YFE0125400, 2017YFC0806100).

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