Study on hysteretic and restoring force model of precast T-shaped joint with concrete-filled steel tubular column

被引：0

作者：

Wu L. ^{[1
,2
]}

Chen H. ^{[1
,2
]}

Guo X. ^{[1
]}

Guo J. ^{[1
]}

Wang S. ^{[1
]}

机构：

[1] North China University of Science and Technology, Tangshan

[2] Hebei Earthquake Engineering Research Center, Tangshan

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷

关键词：

Concrete-filled steel tube; Low-cycle reversed loading test; Restoring force model; Special-shaped column; T-shaped node;

D O I：

10.14006/j.jzjgxb.2021.S2.0014

中图分类号：

学科分类号：

摘要：

In order to study the restoring force model of prefabricated special-shaped columns node with built-in concrete-filled steel tube, three full scale T-shaped nodes of low cycle loading test specimens were tested considering various axial compression ratios. The failure modes and hysteresis characteristics were analyzed. The results show that the axial compression ratio has little influence on the shape of hysteretic loops. The failure mode is the plastic hinge damage at beam end. With the increase of axial compression ratio, slopes of ascending and descending sections of skeleton curves increase, bearing capacity attenuation accelerates and ductility performance increases. When the axial compression ratio increases from 0.2 to 0.4, the bearing capacity increases by 3.2% and 9.4% respectively, and the ductility coefficient increases by 7.2% and 19.2% respectively. Based on the skeleton curve model and stiffness degradation law of specimens, the restoring force model of T-shaped joint of the assembled concrete-filled steel tubular special-shaped column was established. The model adopts the treatment of fixed point pointing and bearing capacity sudden drop, and the characteristic values of the model are basically consistent with the test results. © 2021, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：117 / 124

页数：7

共 15 条

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