方形不锈钢管海砂混凝土柱轴压性能试验研究
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摘要
对12根方形不锈钢管海砂混凝土柱在轴心受压作用下的力学性能进行试验,主要参数为:含钢率和细骨料类型。研究了方形不锈钢管混凝土柱在轴压荷载下的破坏模态、荷载-轴向位移曲线、荷载-应变曲线,并将海砂和河砂对试件承载力的影响进行了对比。试验结果表明:与浇灌河砂混凝土的组合柱试件相比,不锈钢管海砂混凝土柱的破坏模态和轴向荷载-位移关系曲线并无显著区别,不锈钢管能对海砂混凝土产生有效的约束作用,证明了不锈钢管海砂混凝土在实际工程中应用的可能性。最后,采用中国、欧洲和美国的普通钢管混凝土规范对试验实测的极限承载力进行计算比较。
An experimental research on mechanical properties of 12 sea sand concrete filled square stainless steel tubes under axial compression was carried out,where main testing parameters are the steel ratio and type of fine aggregates( river sand,desalted sea sand and sea sand). Based on test results,the failure modes,load-axial displacement curves and loadstrain curves of twelve specimens with square cross section under axial compression were investigated,and the effects of sea sand and river sand on the bearing capacity of specimens were compared. The test results showed that the failure modes and load-displacement curves of square sea sand CFFST columns were generally similar to those of the normal CFSST columns with square cross section. The stainless steel tube could provide effective confinement on the sea sand concrete,which proved the possibility of the application of sea sand concrete filled stainless steel tubes in practical engineering. Then,the predicted results by the existing design codes in China,Europe and the United States for normal concrete filled steel tubes were compared with the test results.
An experimental research on mechanical properties of 12 sea sand concrete filled square stainless steel tubes under axial compression was carried out,where main testing parameters are the steel ratio and type of fine aggregates( river sand,desalted sea sand and sea sand). Based on test results,the failure modes,load-axial displacement curves and loadstrain curves of twelve specimens with square cross section under axial compression were investigated,and the effects of sea sand and river sand on the bearing capacity of specimens were compared. The test results showed that the failure modes and load-displacement curves of square sea sand CFFST columns were generally similar to those of the normal CFSST columns with square cross section. The stainless steel tube could provide effective confinement on the sea sand concrete,which proved the possibility of the application of sea sand concrete filled stainless steel tubes in practical engineering. Then,the predicted results by the existing design codes in China,Europe and the United States for normal concrete filled steel tubes were compared with the test results.
引文
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[4]QUACH W M,TENG J G,CHUNG K F.Three-Stage Full-Range Stress-Strain Model For Stainless Steels[J].Journal of Structural Engineering,2008,134(9):1518-1527.
[5]TAM V W,WANG Z B,TAO Z.Behaviour of Recycled Aggregate Concrete Filled Stainless Steel Stub Columns[J].Material and Structure,2014,47(1/2):293-310.
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[7]UY B,TAO Z,HAN L H.Behaviour of Short and Slender Concrete-Filled Stainless Steel Tubular Columns[J].Journal of Construction Steel Research,2011,67(3):360-378.
[8]LIAO F Y,HAN L H,TAO Z.Experimental Behavior of Concrete-Filled Stainless Steel Tubular Columns Under Cyclic Lateral Loading[J].Journal of Structural Engineering,2017,143(4):1-15.
[9]LI L Y,ZHAO X L,RAMANSINGH R K,et al.Tests on Sea Water and Sea Sand Concrete-Filled CFRP,BFRP and Stainless Steel Tubular Stub Columns[J].Thin-Walled Structure,2016,108(11):163-184.
[10]LI L Y,ZHAO X L,RAMANSINGH R K,et al.Experimental Study on Seawater and Sea Sand Concrete Filled GFRP and Stainless Steel Tubular Stub Columns[J].Thin-Walled Structure,2016,106(9):390-406.
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[12]中华人民共和国国家质量监督检验检疫局.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2010[S].北京:中国标准出版社,2010.
[13]中华人民共和国国家质量监督检验检疫局.建筑用砂:GB/T14684-2011[S].北京:中国标准出版社,2011.
[14]中华人民共和国建设部.普通混凝土用砂、石质量及检验方法标准:JGJ 52-2006[S].北京:中国建筑工业出版社,2006.
[15]中华人民共和国住房和城乡建设部.钢管混凝土结构技术规范:GB 50936-2014[S].北京:中国建筑工业出版社,2014.
[16]福建省住房和城乡建设厅.钢管混凝土结构技术规程:DBJ/T13-51-2010[S].福州:2010.
[17]British Standards Institution.Eurocode 4:Design of Composite Steel and Concrete Structures-Part 1-1:General Rules and Rules for Building:BS EN 1994-1-1∶2004[S].London,UK:2004.
[18]American Institute of Steel Construction.Specification for Structural Steel Buildings:ANSI/AISC 360-10[S].Chicago,USA:2010.