- 摘 要
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(1 遼寧科技大學(xué)土木工程學(xué)院, 鞍山 114000; 2 中國地震局工程力學(xué)研究所, 哈爾濱 150080)
摘要: 為研究圓套圓中空夾層鋼管混凝土的壓扭性能,完成了 12 個該類構(gòu)件在先壓后扭受力下的靜力性能試驗,變化參數(shù)為空心率、含鋼率和軸壓比等. 結(jié)果表明:構(gòu)件的抗扭承載能力較好,在發(fā)生較大的扭轉(zhuǎn)變形后,可以保持較高的承載力. 鋼管中截面三個測點(diǎn)的應(yīng)變變化情況基本一致,彈性階段外鋼管測點(diǎn)的剪應(yīng)變與構(gòu)件扭轉(zhuǎn)角呈線性關(guān)系. 在一定的軸壓比范圍內(nèi)(n≤0. 3),構(gòu)件的抗扭承載力隨軸壓比的增大稍有提高,構(gòu)件的剛度也得到了一定程度的增強(qiáng). 利用 ABAQUS 有限元分析軟件對構(gòu)件的扭矩-轉(zhuǎn)角曲線進(jìn)行了模擬,模擬結(jié)果與試驗結(jié)果吻合較好. 參數(shù)化分析表明:外鋼管變形較為嚴(yán)重,承擔(dān)大部分的截面扭矩,內(nèi)鋼管變形較小. 外鋼管與混凝土接觸面的法向應(yīng)力和剪應(yīng)力較大. 混凝土強(qiáng)度等級對構(gòu)件的抗扭承載力影響很小. 隨著鋼材的強(qiáng)度等級以及含鋼率的提高,構(gòu)件的抗扭承載能力提高很大.
關(guān)鍵詞: 圓套圓中空夾層鋼管混凝土; 壓扭; 軸壓比; 空心率; 抗扭承載力
中圖分類號:TU398 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)12-0030-06
DOI:10. 19701 / j. jzjg. 20210810
Research on compression and torsion performance of circular-in-circual concrete filled double-skinsteel tubular
JIAO Chenxing1, GAO Huaguo1,2, WANG Qingli1
(1 School of Civil Engineering, University of Science and Technology Liaoning, Anshan 114000, China;2 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China)
Abstract: In order to study the compression and torsion performance of circular-in-circual concrete filled double-skin steeltubular, the static performance test of 12 specimens of this type under the first compression and then the torsion force wascompleted, and the parameters such as hollow rate, steel content and axial compression ratio were changed. The resultsshow that the torsional bearing capacity of the specimen is better, and it can maintain a higher bearing capacity after a largetorsional deformation. The strain changes of the three measuring points in the section of the steel pipe are basically thesame, and the shear strain at the measuring point of the outer steel pipe during the elastic stage is linearly related to thetorsion angle of the component. Within a certain range of axial compression ratio (n≤0. 3), the torsional bearing capacityof the specimen can be slightly increases with the increase of axial compression ratio, and the stiffness of the specimen isenhanced to a certain extent. ABAQUS was used to simulate the torque-rotation curve of the test piece, the simulationresults are in good agreement with the test results. The parametric analysis shows that the outer steel pipe deforms moreseriously, bears most of the cross-sectional torque, and the inner steel pipe deforms less. The contact stress and shearstress between the outer steel pipe and the concrete are relatively large. The strength level of concrete has little effect on thetorsional bearing capacity of the component. The increase in the strength grade and steel content of the steel will greatlyimprove the torsional bearing capacity of the component.
Keywords:circular-in-circular concrete filled double-skin steel tubular; compression torsion; axial compression ratio;hollow rate; torsional bearing capacity
∗遼寧省興遼英才計劃(XLYC1902009).
第一作者:焦晨星,碩士,主要從事鋼與混凝土組合結(jié)構(gòu)研究,Email:502855022@ qq. com.
[引用本文] 焦晨星,高華國,王慶利. 圓套圓中空夾層鋼管混凝土壓扭性能研究[ J]. 建筑結(jié)構(gòu),2023,53(12):30-35. JIAO Chenxing,GAO Huaguo,WANG Qingli. Research on compression and torsion performance of circular-incircual concrete filled double-skin steel tubular[J]. Building Structure,2023,53(12):30-35.
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