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查曉雄¹，倉(cāng)友清¹，王曉璐¹，鐘善桐²
(1 哈爾濱工業(yè)大學(xué)深圳研究生院，深圳518055; 2 哈爾濱工業(yè)大學(xué)土木工程學(xué)院，哈爾濱150001)

[摘要] 隨著基礎(chǔ)建設(shè)的飛速發(fā)展，河砂資源短缺的矛盾日益凸顯。儲(chǔ)量豐富的海砂在力學(xué)性能方面和河砂相差不多，但海砂中的氯鹽會(huì)腐蝕鋼材，嚴(yán)重影響構(gòu)件的耐久性。探討了一種在鋼管混凝土柱(CFST)中采用隔離方法合理安全應(yīng)用海砂的新方法。具體做法是在鋼管內(nèi)壁鋪設(shè)FRP薄板或FRP管。FRP材料輕質(zhì)高強(qiáng)，耐腐蝕性能好，不僅可以有效隔離海砂中氯離子對(duì)鋼管的腐蝕，并能提高構(gòu)件的極限強(qiáng)度。主要研究了加入FRP管對(duì)鋼管混凝土組合構(gòu)件軸心受壓力學(xué)性能的影響。通過(guò)有限元分析軟件ABAQUS模擬得到了組合柱軸壓極限強(qiáng)度隨FRP管厚度，鋼管厚度及屈服強(qiáng)度，混凝土軸心抗壓強(qiáng)度，F(xiàn)RP纖維纏繞角度等因素的變化規(guī)律。
[關(guān)鍵詞] 海砂；FRP；CFST；軸心受壓；有限元模擬

Investigation of steel-FRP-sea sand concrete stubs under axial compressive loading
Zha Xiaoxiong¹, Cang Youqing¹, Wang Xiaolu¹, Zhong Shantong²
(1 Harbin Institute ofTechnology Shenzhen Graduate School, Shenzhen 518055,China; 2 Harbin Institute of Technology Civil Engineering School, Harbin 150001, China)

Abstract: With the rapid development ofinfrastructure, river sand supply shortage has become increasingly prominent while the sea sand storage is rich. The mechanical properties of sea sand are almost the same with river sand, but the chloride ion contained in sea sand causes corrosion of steel and seriously affects the durability of components. This article discusses a new isolation method of sea sand application in concrete-filled steel tubes. Specifically practice is to lay a FRP pipe or FRP sheet between steel pipe and the inner concrete. FRP material is widely used in structural field since its high strength and good corrosion resistance. FRP pipe can not only isolates chloride ion in sea sand, but also improves the ultimate strength of the component. This paper studied the contribution of FRP pipe to ultimate strength of component under axial compressive loading. Finite element analysis software ABAQUS has been used to simulate the behavior of component. Ultimate strength is obtained with the vibration of the thickness of FRP tubes, yield strength and thickness of steel tube, axial compressive strength of concrete, fiber orientation of FRP and so on.
Keywords: sea-sand; FRP; CFST; axial compressive loading; finite element modeling