赵军, 吴明训, 姚敦敏,等.高温后无缝钢管灌浆套筒单向拉伸试验研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023070001

ZHAO J, WU M X, YAO D M, et al.Study on uniaxial tensile test of grouting sleeve of seamless steel pipe after hightemperature[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023070001

高温后无缝钢管灌浆套筒单向拉伸试验研究(网络首发)

赵军1, 吴明训2, 姚敦敏1, 马彬1

1.桂林电子科技大学 建筑与交通工程学院，广西 桂林  541004;2.桂林理工大学 土木与建筑工程学院，广西 桂林  541004

摘要:为了解高温后无缝钢管灌浆套筒的力学性能，以温度、冷却方式、保护层厚度、钢筋直径 等为研究参数，对高温后无缝钢管灌浆套筒进行单向拉伸试验。结果表明：灌浆料的抗折、抗 压强度随着温度的升高而降低，抗折强度下降幅度更大，说明温度对灌浆料抗折强度的影响大 于抗压强度；高温后试件有钢筋拉断和钢筋拔出两种破坏模式，浇水冷却和无保护层试件更容 易出现钢筋拔出破坏，保护层可以有效提高灌浆套筒的延性和承载力；随着钢筋直径增加，接 头试件极限承载力下降幅度变大，钢筋直径为18，20，22 mm的试件极限强度分别下降 20.72%、24.24%和25.97%。推导了各参数影响下高温后灌浆套筒承载力计算公式，计算结果与试验结果吻合较好，该公式可对高温后全灌浆套筒的承载力进行预测。

关键词:装配式建筑;无缝钢管;全灌浆套筒;高温后;单向拉伸

中图分类号: TU375

doi:10.16186/j.cnki.1673-9787.2023070001

基金项目:国家自然科学基金资助项目（12162010）；广西科技计划资助项目（桂科AD20159085，桂科AA20302006）

收稿日期:2023-07-01

修回日期:2023-09-08

网络首发日期: 2023-10-16

Study on uniaxial tensile test of grouting sleeve of seamless steel pipe after hightemperature（Online）

ZHAO Jun1, WU Mingxun2, YAO Dunmin1, MA Bin1

1.School of Architecture and Transportation Engineering，Guilin University of Electronic Technology，Guilin  541004，Guangxi，China;2.College of Civil Engineering and Architecture，Guilin University of Technology，Guilin  541004，Guangxi，China

Abstract:In order to understand the mechanical properties of grouting sleeve of seamless steel tube after high temperature，the uniaxial tensile test of grouting sleeve of seamless steel tube after high temperature was carried out with temperature，cooling mode，thickness of protective layer and diameter of steel bar as research parameters.The results show that the flexural strength and compressive strength of the grouting material decrease with the increase of temperature，and the flexural strength decreases more，indicating that the effect of temperature on the flexural strength of the grouting material is greater than that of the compressive strength； After high temperature，the specimens have two failure modes of steel bar breaking and steel bar pulling out.The specimens with water cooling and without protective layer are more prone to steel bar pulling out failure. The protective layer can effectively improve the ductility and bearing capacity of grouting sleeve； As the diameter of the steel bar increases，the ultimate bearing capacity of the joint specimens de⁃creases.The ultimate strength of the specimens with steel bar diameters of 18 mm，20 mm and 22 mm decreases by 20.72%，24.24% and 25.97%，respectively；The calculation formula of bearing capacity of grouting sleeve after high temperature is derived under the influence of various parameters.The calculation results are in good agreement with the experimental results.The formula can predict the bearing capacity of full grouting sleeve after high temperature.

Key words:fabricated building;seamless steel;pipe full grouting sleeve;after high temperature;monoaxial stretching

CLC: TU375