Interfacial Bond-Slip Performance of Square Aluminum Alloy Tube-Seawater Sea-Sand Geopolymer Concrete

doi:10.16552/j.cnki.issn1001-1625.2024.0848

Abstract

Abstract: The bond-slip performance of square aluminum alloy tube-seawater sea-sand geopolymer concrete (SSGC) structure is the cornerstone to ensure its ability to work together. In order to study the interfacial bond-slip performance of square aluminum alloy tube-SSGC, nine specimens were made for push-out test with concrete strength, diameter-thickness ratio and length-diameter ratio as research parameters. The load-slip curve of specimen, the longitudinal strain distribution on the surface of the square aluminum alloy tube and the influence of the research parameters were analyzed by tests. Based on the test data, the calculation formula of bond strength and bond-slip constitutive equation of square aluminum alloy tube-SSGC were proposed. The results show that the typical load-slip curve of square aluminum alloy tube-SSGC can be divided into four stages, namely linear rising stage, nonlinear rising stage, slow falling stage and residual horizontal stage. The longitudinal strain on the surface of the square aluminum alloy tube shows a exponential distribution along the height direction, and increases from the loading end to the free end. The bond strength of specimen decreases with the increase of the diameter-thickness ratio and the length-diameter ratio.

Key words: square aluminum alloy tube, seawater sea-sand geopolymer concrete, push-out test, slip performance, bond strength, constitutive equation

CLC Number:

TU398.9

LU Junhui, LYU Hai, LI Junyuan, YANG Haifeng, CAO Huayi. Interfacial Bond-Slip Performance of Square Aluminum Alloy Tube-Seawater Sea-Sand Geopolymer Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 90-100.

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