Steel and Composite Structures

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Cyclic response and design procedure of a weak-axis cover-plate moment connection

  • Lu, Linfeng (School of civil engineering, Chang'an University) ;
  • Xu, Yinglu (School of civil engineering, Chang'an University) ;
  • Zheng, Huixiao (School of civil engineering, Chang'an University) ;
  • Lim, James B.P. (Department of Civil and Environmental Engineering, University of Auckland (City Campus))
  • Received : 2017.07.29
  • Accepted : 2017.11.07
  • Published : 2018.02.10
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Abstract

This paper systematically investigated the mechanical performance of the weak-axis cover-plate connection, including a beam end monotonic loading test and a column top cyclic loading test, and a series of parametric studies for exterior and interior joints under cyclic loading using a nonlinear finite element analysis program ABAQUS, focusing on the influences of the shape of top cover-plate, the length and thickness of the cover-plate, the thickness of the skin plate, and the steel material grade. Results showed that the strains at both edges of the beam flange were greater than the middle's, thus it is necessary to take some technical methods to ensure the construction quality of the beam flange groove weld. The plastic rotation of the exterior joint can satisfy the requirement of FEMA-267 (1995) of 0.03 rad, while only one side connection of interior joint satisfied ANSI/AISC 341-10 under the column top cyclic loading. Changing the shape or the thickness or the length of the cover-plate did not significantly affect the mechanical behaviors of frame joints no matter in exterior joints or interior joints. The length and thickness of the cover-plate recommended by FEMA 267 (1995) is also suitable to the weak-axis cover-plate joint. The minimum skin plate thickness and a design procedure for the weak-axis cover-plate connections were proposed finally.

Keywords

Acknowledgement

Supported by : Nature Science Foundation of China (NSFC), Central Universities

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