- 摘 要
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(大連理工大學海岸和近海工程國家重點實驗室，大連 116024)
［摘要］為了研究GFRP套管混凝土長柱的軸壓力學性能，對9根不同長細比的組合長柱進行了試驗研究。對試件的破壞特征、軸向應變、荷載峰值、柱撓度變化、柱中截面應變方面進行了比較。試驗結果表明：隨長細比的增加，GFRP套管柱的力學特征發(fā)生了很大的改變，逐漸由強度破壞轉變?yōu)槭Х€(wěn)破壞；同時，GFRP套管柱與傳統(tǒng)的鋼筋混凝土長柱在力學性能上表現(xiàn)出很大的不同，主要表現(xiàn)在當組合長柱達到峰值應力時，所有試件的縱向鋼筋均已屈服，發(fā)生了非彈性失穩(wěn)破壞，且其峰值荷載下降的幅度遠高于普通混凝土長柱。
［關鍵詞］軸心受壓； GFRP套管；鋼筋混凝土長柱；組合結構
Experimental study on mechanical properties of concrete filled GFRP tubular long columns under axial loading
Wang Qingxiang, Guan Hongbo, Cui Wentao
(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China)
Abstract:In order to study mechanical properties of concrete filled GFRP tubular long columns under the axial loading, experimental study on nine different slenderness ratios was carried out. Axial failure characteristics, axial strain, peak load, deflection along the column, cross-section strain in the middle of the column, were compared. The results show that with the increasing of slenderness ratio, the mechanical properties of the composite long columns have significant change and the failure mode is gradually converted from strength failure to instability failure. The mechanical properties are very different between the GFRP composite long column and the RC column. When the composite long columns reach their peak stress, longitudinal reinforcements yield and non-elastic instability failune are occurred. The decline rate of the peak loads of the composite long columns is much higher than that of RC columns.
Keywords:axial compression strength; GFRP tubular; reinforcement concrete long column; composite structure
作者簡介：王清湘，教授，博士生導師，Email: wangqx7885@yahoo.cn。
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