Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading

doi:10.1007/s12204-020-2160-9

Journal of Shanghai Jiao Tong University (Science) ›› 2020, Vol. 25 ›› Issue (3): 384-393.doi: 10.1007/s12204-020-2160-9

Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading

DING Kewei (丁克伟), LIU Jianhua (刘建华), REN Jianwei (任建伟), MA Wei (马巍)

(a. College of Civil Engineering; b. Provincial Key Laboratory for Architectural Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, China)

出版日期:2020-06-15 发布日期:2020-05-29
通讯作者: DING Kewei (丁克伟) E-mail: dingkw@ahjzu.edu.cn

Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading

DING Kewei (丁克伟), LIU Jianhua (刘建华), REN Jianwei (任建伟), MA Wei (马巍)

(a. College of Civil Engineering; b. Provincial Key Laboratory for Architectural Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, China)

Online:2020-06-15 Published:2020-05-29
Contact: DING Kewei (丁克伟) E-mail: dingkw@ahjzu.edu.cn

摘要/Abstract

摘要： Taking the excellent energy absorption performances of cellular structures into consideration, three beam-column steel joints are proposed to analyze the effect of cellular metallic fillers on impact mechanical responses of beam-column joints. Based on the existing experimental results, the finite element models of the associated joints are established by using finite element method software. The deformation mode, the bearing capacity and energy absorption performance of various joints subjected to impact loadings with the loading velocities from 10 to 100 m/s are analyzed, respectively. The dynamic responses of cellular metal-filled beamcolumn joints are quantitatively analyzed by means of displacements of central region, nominal impacting stress and energy absorption efficiency. The results can be concluded that the filling of cellular filler weakens the stress concentration on joints, alleviates the occurrence of tearing in connection region among column and beam, and reduces the displacement caused by impact loading. Energy absorption efficiency of filled joints subjected to impact loading increases as the impacting velocity increases, and the cellular metallic filler improves their impact resistance of beam-column joints. The energy absorption efficiency of fully filled joints is superior to that of others. This study can provide a reference for steel structural design and post-disaster repair under extreme working conditions.

关键词: steel beam-column joint, cellular metal material, impact loading, dynamic responses, impact energy absorption

Abstract: Taking the excellent energy absorption performances of cellular structures into consideration, three beam-column steel joints are proposed to analyze the effect of cellular metallic fillers on impact mechanical responses of beam-column joints. Based on the existing experimental results, the finite element models of the associated joints are established by using finite element method software. The deformation mode, the bearing capacity and energy absorption performance of various joints subjected to impact loadings with the loading velocities from 10 to 100 m/s are analyzed, respectively. The dynamic responses of cellular metal-filled beamcolumn joints are quantitatively analyzed by means of displacements of central region, nominal impacting stress and energy absorption efficiency. The results can be concluded that the filling of cellular filler weakens the stress concentration on joints, alleviates the occurrence of tearing in connection region among column and beam, and reduces the displacement caused by impact loading. Energy absorption efficiency of filled joints subjected to impact loading increases as the impacting velocity increases, and the cellular metallic filler improves their impact resistance of beam-column joints. The energy absorption efficiency of fully filled joints is superior to that of others. This study can provide a reference for steel structural design and post-disaster repair under extreme working conditions.

Key words: steel beam-column joint, cellular metal material, impact loading, dynamic responses, impact energy absorption

中图分类号:

TU 391

DING Kewei, LIU Jianhua, REN Jianwei, MA Wei . Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading[J]. Journal of Shanghai Jiao Tong University (Science), 2020, 25(3): 384-393.

参考文献

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Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading

Dynamic Responses of Cellular Metal-Filled Steel Beam-Column Joint Under Impact Loading

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