Lateral impact behavior of double-skin steel tubular (DST) members with ultra-high performance fiber-reinforced concrete (UHPFRC)

被引：42

作者：

Wang, Weiqiang ^{[1
]}

Wu, Chengqing ^{[1
,2
]}

Li, Jun ^{[1
]}

Liu, Zhongxian ^{[2
]}

Zhi, Xudong ^{[3
]}

机构：

[1] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Built Infrastruct Res, Sydney, NSW 2007, Australia

[2] Tianjin Chengjian Univ, Tianjin Key Lab Civil Struct Protect & Reinforcem, Tianjin 300384, Peoples R China

[3] Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin 150090, Heilongjiang, Peoples R China

来源：

THIN-WALLED STRUCTURES | 2019年 / 144卷

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

UHPFRC; Double-skin steel tubular (DST) members; Lateral impact behavior; Numerical model; Stress wave propagation; COMPRESSIVE BEHAVIOR; TUBE COLUMNS; MECHANICAL-PROPERTIES; NUMERICAL-SIMULATION; TENSILE BEHAVIOR; CFDST MEMBERS; HOLLOW; PARAMETERS; RESISTANCE; STRENGTH;

D O I：

10.1016/j.tws.2019.106351

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigates the lateral impact behavior of double-skin steel tubular (DST) members with ultra-high performance fiber-reinforced concrete (UHPFRC). A total of six specimens were prepared and tested under lateral impact loading. In addition to UHPFRC filled DST members, normal strength concrete (NSC) filled DST member was also tested for comparison. Other investigated parameters in this study include the impact energy, the outer steel tube thickness, the inner steel tube thickness, and the presence of axial force. The test results demonstrate that the UHPFRC filled DST members exhibit significantly higher lateral impact resistance capacity than the NSC filled DST member. The impact energy and the outer steel tube thickness significantly affect the lateral impact behavior of UHPFRC filled DST members, while the influence of inner steel tube thickness is insignificant. With the applied axial force in this study, the influence of axial force is also insignificant. Afterwards, numerical model was developed and validated by the present test results. Based on the validated numerical model, the mid-span bending moment distributions and the stress wave propagations were investigated. Finally, parametric analyses were carried out to investigate the influences of different parameters on the lateral impact behavior of UHPFRC filled DST members.

引用

页数：24

共 56 条

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