方钢管混凝土柱-H 型钢梁全螺栓连接节点抗震试验及有限元分析

doi:10.12066/j.issn.1007-2861.2130

Abstract

Abstract:

Three concrete-filled square steel tubular column and H-type steel beam for two-sided all-bolted connections were fabricated according to the specifications of two countries, China and America. Repeated low cyclic loading tests were conducted on different loading systems. The results showed that the hysteretic loop curves and skeleton curves of the welded joint had obvious characteristics because of the relative slip in the clapboard flange, and the hysteretic loop curve in the horizontal section showed a pinch shrink shape. The test results indicated that the loading system controlled by the displacement angle was more complete and better than the loading system controlled by "two stages" owing to the existence of the slip section in tests on all the bolted joints. At the same time, using the finite element software, ABAQUS, for repeated low cyclic loads on the steel beam and concrete-filled steel tube, the stress performance of the bolt connection node was calculated and analysed. These results verified the accuracy of the test results. Further, the stiffness degradation, ductility performance, and overall strength degradation coefficient of the seismic performance of the nodes were analysed. In addition, because of the existence of the relative slip in the plate flange, a revised evaluation of these indicators was proposed.

Key words: concrete-filled square steel tubular column, bolted connection, finite element calculation, repeated low cyclic load, analysis of seismic performance

CLC Number:

TU398

CHEN Jingyuan, YANG Feng, DING Xinbiao, WANG Peicheng. Seismic test and finite element analysis of bolted joints connecting concrete-filled square steel tubular column and H-type steel beam[J]. Journal of Shanghai University（Natural Science Edition）, 2021, 27(2): 347-359.

Figures/Tables 17

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References 14

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Seismic test and finite element analysis of bolted joints connecting concrete-filled square steel tubular column and H-type steel beam

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