Experimental study on seismic performance of prefabricated core steel tube reinforced concrete columns

被引：0

作者：

Zhang Y. ^{[1
,2
]}

Liu Y. ^{[1
,2
]}

Ruan J. ^{[1
]}

Zhong P. ^{[1
]}

Ren Y. ^{[3
]}

机构：

[1] College of Civil Engineering, Huaqiao University, Xiamen

[2] Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province, Huaqiao University, Xiamen

[3] Fujian Construction Engineering Group Co., Ltd, Fuzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 12期

关键词：

core steel tube reinforced concrete column; DIC technique; prefabricated structure; pseudo-static test; seismic performance;

D O I：

10.14006/j.jzjgxb.2021.0552

中图分类号：

学科分类号：

摘要：

Prefabricated core steel tube-reinforced concrete (PCSTRC) columns can be used for fast column-column assembly in hybrid structures. Five full-scale PCSTRC columns, two monolithic core steel tube-reinforced concrete (CSTRC) columns and a conventional reinforced concrete column, were designed and tested under quasi-static cyclic loading in order to investigate their seismic performance. The digital image correlation (DIC) technique was adopted for measuring the lateral displacements of specimens during the loading process. The differences between the PCSTRC columns and the cast-in-situ columns were analyzed in terms of the failure modes, load-carrying capacities, hysteretic curves and deformation capacities. The effects of axial load ratio, steel ratio and assembly position on the seismic performance of PCSTRC columns were investigated. The test results show that all the PCSTRC columns experience flexure-controlled failure as expected. Full hysteretic curves are achieved for the PCSTRC columns. The load-carrying capacity, stiffness, and energy dissipation of the PCSTRC columns are comparable to those of the cast-in-situ columns, and the ultimate drift ratio and the ductility of the former are slightly higher. The steel sleeves can effectively transfer stresses. The core steel tube enhances the reliability of vertical connection. The difference in the curvature distribution between the PCSTRC columns and the cast-in-situ columns is mainly concentrated in the sleeve region and the assembly area below the sleeve region. For the PCSTRC columns, the proportion of rigid body rotation deformation caused by the slip mechanism in the total horizontal displacement is larger than their cast-in-situ counterparts. © 2022 Science Press. All rights reserved.

引用

页码：135 / 144

页数：9

共 22 条

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