方铝合金管-海水海砂地聚物混凝土的界面黏结滑移性能  

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

作　　者：陆俊辉 吕海 李钧源 杨海峰[1,2] 曹化一 LU Junhui;LYU Hai;LI Junyuan;YANG Haifeng;CAO Huayi(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西防灾减灾与工程安全重点实验室,南宁530004

出　　处：《硅酸盐通报》2025年第1期90-100,共11页Bulletin of the Chinese Ceramic Society

基　　金：广西自然科学基金(2023GXNSFAA026178);广西科技重大专项项目(AA23023034)。

摘　　要：方铝合金管-海水海砂地聚物混凝土(SSGC)结构的黏结滑移性能是保证其能够协同工作的基石。为研究方铝合金管-SSGC的界面黏结滑移性能,以混凝土强度、径厚比和长径比为研究参数,制作了9个试件进行推出试验,通过试验分析了试件的荷载-滑移曲线、方铝合金管表面纵向应变分布和研究参数的影响。基于本次试验数据,提出了方铝合金管-SSGC的黏结强度计算公式及黏结-滑移本构方程。结果表明:方铝合金管-SSGC的典型荷载-滑移曲线可分为四个阶段,即线性上升段、非线性上升段、缓慢下降段、残余水平段;方铝合金管表面纵向应变沿高度方向呈指数分布,自加载端至自由端递增;试件的黏结强度随径厚比和长径比的增大而降低。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.

关 键 词：方铝合金管 海水海砂地聚物混凝土 推出试验 滑移性能 黏结强度 本构方程 

分 类 号：TU398.9[建筑科学—结构工程]