渣基地聚合物混凝土外梁柱节点火后性能研究

IF 1.2 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-02-24 DOI:10.1680/jstbu.21.00183

B. Roy, Arshad Hussain Choudhury, A. Laskar

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引用次数: 0

摘要

渣基地聚合物在循环荷载作用下的火灾后性能尚未见报道，而此类结构中钢筋的状况至今仍未得到研究。本工作对矿渣基地聚合物外梁柱节点进行了自然火暴露后的循环试验。此外，还确定和分析了火灾暴露试件中嵌入的钢筋的力学性能。循环试验结果表明，地聚合物和钢筋的劣化使火暴露试件的破坏模式由预期的梁端铰破坏转变为节理剪切破坏。与未加热对照试样相比，火暴露试样的峰值荷载、刚度、延性和能量耗散显著降低。

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Post-fire performance of exterior beam-column joint made with slag-based geopolymer concrete

Post-fire performance of slag based geopolymer in structures under cyclic loading is yet to be reported and condition of rebar inside such structures remains unexplored till date. In the present work cyclic test was conducted on exterior beam-column joint made with slag based geopolymer after exposing the specimens to natural fire. Further, mechanical properties of reinforcement embedded in fire exposed specimen were also determined and analysed. Cyclic test results indicated that deterioration of geopolymer and rebar alter the failure pattern of fire exposed specimen from desired beam end hinging to joint shear failure. Peak load, stiffness, ductility and energy dissipation reduced significantly in fire exposed specimen compared with unheated control specimen.

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来源期刊

Proceedings of the Institution of Civil Engineers-Structures and Buildings 工程技术-工程：土木

CiteScore

3.40

自引率

6.20%

发文量

审稿时长

12 months

期刊介绍： Structures and Buildings publishes peer-reviewed papers on the design and construction of civil engineering structures and the applied research associated with such activities. Topics include the design, strength, durability and behaviour of structural components and systems. Topics covered: energy conservation, people movement within and around buildings, strength and durability of steel and concrete structural components, and the behaviour of building and bridge components and systems