Experimental study on performance of prestressed concrete beam-column substructure against progressive collapse

被引：0

作者：

Deng X. ^{[1
]}

Li Z. ^{[1
]}

Weng Y. ^{[1
]}

Yu X. ^{[2
]}

Qian K. ^{[1
]}

机构：

[1] School of Civil Engineering and Architecture, Guangxi University, Nanning

[2] School of Civil Engineering, Harbin Institute of Technology, Harbin

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 08期

关键词：

Beam-column substructure; Bonded prestressed tendon; Prestressed concrete; Progressive collapse; Pushdown test; Unbonded prestressed tendon;

D O I：

10.14006/j.jzjgxb.2018.0117

中图分类号：

学科分类号：

摘要：

Based the quasi-static pushdown test on four prestressed concrete (PC) beam-column substructures with bonded and unbonded tendons, the progressive collapse resistance of PC frames under an interior column removal scenario was investigated. Comparison of the pushdown results between bonded and unbonded PC beam-column substructures shows that the bond behavior could effectively improve the yield strength and initial stiffness. The collapse resistance of the two substructures is mainly attributed to the catenary mechanism developed by the prestress tendons and reinforcements. Moreover, the result of non-prestressed reinforcement ratio to its preformance against progressive collapse is also obvious. The increase of the non-prestressed reinforcement ratio causes unfavorable effect to the surrounding components at catenary action stage. Therefore, it is necessary to balance the ratio of prestressing tendons to non-prestressed reinforcements in the progressive collapse design of PC structures. © 2019, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：71 / 78

页数：7

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