Influence Mechanism of Steel Diagonal Braces on Mechanical Behavior of Steel Truss-RC Tubular Column Hybrid Structure

ABSTRACT

This paper aims to investigate the influences of steel diagonal braces (SDB) on the deformation performance and seismic behavior of steel truss-RC tubular column hybrid structures. Firstly, the vertical deformation performance of the structures with and without SDB was compared through finite element analysis. Then, pseudo-dynamic tests were carried out to investigate the seismic behavior of a 1/8-scaled substructure with SDB, and hysteretic curves were obtained by applying a subsequent displacement-controlled cyclic loading. The test results indicated that adding SDB is an effective approach to decrease the deflections of steel truss and enables to improve the lateral stiffness and lateral bearing capacity of the steel truss-RC tubular column hybrid structure. In addition, numerical modeling of the specimen with SDB was built on the basis of the refined finite element program. The comparisons between the finite element analysis and test results indicated that the FE modeling approach is reasonable to predict the seismic behavior of this type of hybrid structure.

KEYWORDS:

• Steel truss-RC tubular column hybrid structure
• steel diagonal brace
• deformation performance
• seismic behavior
• pseudo-dynamic test

Acknowledgments

Special thanks to Prof. Guoliang Bai from Xi’an University of Architecture and Technology for helpful and valuable discussions on the experimental program.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51708037]; Natural Science Foundation of Shaanxi Province [2018JQ5078]; Xi’an Municipal Science and Technology Planning Project [201805045YD23CG29(6)].