|Table of Contents|

Analysis of Influence Factors on Hysteretic Behavior of Weak-axis Square Tubular Web RBS Connection(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年02期
Page:
64-76
Research Field:
Publishing date:

Info

Title:
Analysis of Influence Factors on Hysteretic Behavior of Weak-axis Square Tubular Web RBS Connection
Author(s):
LU Lin-feng1 AI Long1 HAO Zhen-fen2 ZHANG Ting-qiang1 CHEN Li-meng1
(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. Beijing Special Engineering Design and Research Institute, Beijing 100028, China)
Keywords:
joint region weak-axis connection square steel tube plastic hinge seismic behavior
PACS:
TU391
DOI:
-
Abstract:
Based on the basic form of box-strengthened joint region connection for the weak-axis of I-section column, a new type of steel frame beam-column weakening connection, named as STW-RBS was presented, which could weaken the beam's rigidity by using square steel tube to replace the beam web at the expected position of the plastic hinge. In order to study the seismic performance of the new-type connection, seven STW-RBS specimens were designed for finite element parametric(the side length and thickness of the square steel tube and the distance from the steel pipe center to the surface of the skin plate)analysis and one TW-RBS type weak-axis joint specimens for comparative analysis. The seismic behavior of the joints was analyzed mainly from the hysteretic curve, skeleton curve, stiffness degeneration curve, ductility coefficient and plastic rotation ability. The results show that the weakening parameter of STW-RBS type weak axis connection is l≤0.55 h, a≥0.6bf, s=tw(h is beam section height, bf is flange width and tw is beam web thickness). If the above parameters are reasonable, the ductility coefficient of the STW-RBS weak-axis connection can reach 6.0 and the plastic rotational capacity is not less than 0.06 rad; the plastic hinge appears in the square steel pipe place, and the steel column and nodal area are basically in the elastic state, satisfying the seismic design idea of the “strong column, weak beam and strong joint, weak component”. The seismic performance of STW-RBS type weak-axis connection node is basically same with AW-RBS type weak-axis connection node.

References:

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Last Update: 2019-03-27