ABSTRACT
As stated above, it is necessary to research the seismic performance of modularized prefabricated column-tree steel frame (Liu et al. 2015a, b, Zhang & Liu 2013). In this article, aimed at the modularized prefabricated steel frame with Z-shaped cantilever beam splicing, a method of utilizing connecting element of ABAQUS finite element software to simulate the beam and column connection with Z-shaped cantilever beam splicing of the overall structure is proposed, and the reliability of using the connecting element method in the overall structure is verified. On this basis, modal analysis and pushover analysis are conducted on
1 INTRODUCTION
Quality of welding joint can be guaranteed as welding of beam and column is completed in the factory for column-tree frame. What’s more, highstrength bolt connection has been conducted on the site to quicken installation. Therefore, columntree frame structure system has been widely applied (Astaneh-Asl 1997). The seismic behavior of column-tree frame is analyzed and the improvement measures are put forward. Mcmullin et al. (2003) have conducted theoretical and experimental researches about seismic performance of semirigid column-tree steel frame and put forward that column-tree construction can utilize splice assemblies to provide stable energy dissipation during lateral movement. Chen & Lin (2006 & 2013) have researched seismic performance of reinforced column-tree connection, put forward that the specimens can successfully develop ductile behavior with no brittle fracture by forming the plastic hinging of the beam away from the beam-column interface. Oh et al. (2014) have conducted quasistatic test for column-tree connections with weakened beam splices, and put forward the moment resisting capacity of the specimens doesn’t obviously decrease. Also, their energy dissipation capacity is better than that of the specimen following the full-strength design principle.
