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Steel and Composite Structures
  Volume 27, Number 1, April10 2018 , pages 75-87

The multi-axial strength performance of composite structural B-C-W members subjected to shear forces
Limeng Zhu, Chunwei Zhang, Xiaoming Guan, Brian Uy, Li Sun and Baolin Wang

    This paper presents a new method to compute the shear strength of composited structural B-C-W members. These B-C-W members, defined as concrete-filled steel box beams, columns and shear walls, consist of a slender rectangular steel plate box filled with concrete and inserted steel plates connecting the two long-side steel plates. These structural elements are intended to be used in structural members of super-tall buildings and nuclear safety-related structures. The concrete confined by the steel plate acts to be in a multi-axial stressed state: therefore, its shear strength was calculated on the basis of a concrete\'s failure criterion model. The shear strength of the steel plates on the long sides of the structural element was computed using the von Mises plastic strength theory without taking into account the buckling of the steel plate. The spacing and strength of the inserted plates to induce plate yielding before buckling was determined using elastic plate theory. Therefore, a predictive method to compute the shear strength of composited structural B-C-W members without considering the shear span ratio was obtained. A coefficient considering the influence of the shear span ratio was introduced into the formula to compute the anti-lateral bearing capacity of composited structural B-C-W members. Comparisons were made between the numerical results and the test results along with this method to predict the anti-lateral bearing capacity of concrete-filled steel box walls. Nonlinear static analysis of concrete-filled steel box walls was also conducted by using ABAQUS and the results agreed well with the experimental data.
Key Words
    shear strength; multi-axial stressing state; concrete failure criterion; shear span ratio; buckling; nonlinear static analysis
(1) Limeng Zhu, Chunwei Zhang, Xiaoming Guan:
School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, P.R. China;
(2) Brian Uy:
School of Civil Engineering, University of Sydney, Sydney, 2006, Australia;
(3) Li Sun:
School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, P.R. China;
(4) Baolin Wang:
Graduate School at Shenzhen, Harbin Institute of Technology, Harbin 150001, P.R. China.

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