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（1 華東交通大學(xué)土木建筑學(xué)院, 南昌 330013； 2 贛州市南康區(qū)浮石鄉(xiāng)人民政府， 贛州 341404）
［摘要］設(shè)計(jì)了16根方鋼管混凝土短柱試件，對不同截面尺寸、核心混凝土骨料類型、酸雨腐蝕率的試件進(jìn)行軸壓試驗(yàn)，并對酸雨環(huán)境下不同腐蝕程度的方鋼管再生混凝土軸壓短柱的延性、荷載-縱向應(yīng)變、組合彈性模量、損傷分析以及承載力驗(yàn)算進(jìn)行了分析。試驗(yàn)結(jié)果表明：酸雨環(huán)境下方鋼管普通混凝土短柱和方鋼管再生混凝土短柱有相似的破壞形態(tài)。隨著腐蝕程度的加深，方鋼管普通混凝土軸壓短柱和方鋼管再生混凝土軸壓短柱后期延性變差，腐蝕程度越深，后期延性下降越大，組合彈性模量下降越明顯，試件損傷越嚴(yán)重，承載力下降越大。酸雨環(huán)境下的鋼管混凝土構(gòu)件可近似看作均勻腐蝕，采用折減壁厚的方法對鋼管混凝土短柱承載力進(jìn)行驗(yàn)算，結(jié)果與試驗(yàn)數(shù)據(jù)吻合度高。
［關(guān)鍵詞］酸雨腐蝕； 方鋼管再生混凝土； 軸壓； 承載力
中圖分類號：TU398文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)06-0035-06
Experimental study on mechanical properties of the recycled concrete filled steel square tube short column under acid rain environment
Chen Mengcheng1， Wang Chao1， Huang Hong1, Liu Jingjian2
(1 School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China;
2 The People′s Government of Fushi, Nankang, Ganzhou， Ganzhou 341404, China)
Abstract:Sixteen specimens were made to study the axial compression loads on the recycled concrete filled steel square tube short column(RCFSTSC)under acid rain corrosion with different parameters including section size, core concrete aggregate type and acid rain corrosion ratio. The ductility，axial load-strain curve, composite elastic degeneration, damage accumulation and the bearing capacity of specimens under different corrosion degree were analyzed. The results show that the failure pattern of the concrete filled steet square tube short column(CFSTSC) under acid rain corrosion is similar to the RCFSTSC under acid rain corrosion. With the depending of corrosion, the ductility and the bearing capacity of the CFSTSC and the RCFSTSC are getting worse, the composite elastic of specimen descended and the damage degree are growing worse. The corrosion of specimens under acid rain can be approximately regarded as uniform corrosion. The method of reducing thickness of the wall was used to calculate the bearing capacity of the concrete filled steel tube short column, the results show high agreement with the experimental data.
Keywords:acid rain corrosion; recycled concrete filled steel square tube; axial compression; bearing capacity
*國家自然科學(xué)基金項(xiàng)目（51378206,51468017），江西省重點(diǎn)基金項(xiàng)目（20143ACB21020），江西省優(yōu)勢科技創(chuàng)新團(tuán)隊(duì)建設(shè)計(jì)劃項(xiàng)目(20152BCB24006)。
作者簡介：陳夢成，博士，教授，博士研究生導(dǎo)師，Email：mcchen@ecjtu.edu.cn。
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