Analysis on behavior degradation of steel reinforced recycled concrete members after exposure to high temperatures

被引：0

作者：

Jing C. ^{[1
]}

Chen Z. ^{[1
,2
]}

Zheng W. ^{[3
]}

机构：

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

[2] Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education, Nanning

[3] China Construction Eighth Engineering Division Guangxi Branch, Nanning

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2016年 / 37卷

关键词：

Beam; Column; High temperature; Performance deteriorated; Recycled concrete; Steel reinforced concrete;

D O I：

10.14006/j.jzjgxb.2016.S2.008

中图分类号：

学科分类号：

摘要：

A series of experimental studies on the behavior of steel reinforced recycled concrete members after high temperature were introduced. The design parameters included recycled coarse aggregate replacement percentage and high temperature.Tests of 120 prism blocks, 24 steel reinforced recycled concrete short columns and 32 steel reinforced recycled concrete beams were conducted. Based on the test data, apparent damage, bearing capacity, and stiffness degradation of the recycled concrete prism blocks and steel recycled concrete members were analyzed. The results show that after exposure to high temperature, the recycled concrete exhibits some physical changes. The apparent color changes from blueish-grey to white-grey, the surface is cracked and the quality is decreased. With the increase of maximum high temperatures, the strength and elastic modulus of recycled concrete, and the axial compression, bending and shear bearing capacities and stiffness of steel recycled concrete members, are significantly degraded. The ductility and energy dissipation properties of steel recycled concrete members is weakly affected by the temperature. With the increase of replacement percentage, the mass loss rate, peak deformation and bearing capacity show slightly increasing, but the stiffness, ductility and energy dissipation are volatile and have no particular rules. © 2016, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：51 / 57and63

页数：5712

共 16 条

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