- 摘 要
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(1 西安理工大學(xué)土木建筑工程學(xué)院, 西安 710048; 2 西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055)
[摘要]基于型鋼再生混凝土組合柱低周反復(fù)荷載試驗,提出了可考慮組合柱開裂點、屈服點、峰值點以及極限點的骨架曲線計算模型,采用回歸分析和理論推導(dǎo)相結(jié)合的方法確定了該計算模型中各特征點參數(shù)值和折線剛度值計算公式。在此基礎(chǔ)上,結(jié)合組合柱的剛度特征和滯回特性,給出其剛度退化規(guī)律、卸載剛度計算公式以及相應(yīng)的滯回規(guī)則,并建立了型鋼再生混凝土組合柱四折線恢復(fù)力模型。結(jié)果表明,計算骨架曲線與試驗骨架曲線吻合較好,該四折線恢復(fù)力模型較好地反映了組合柱在低周反復(fù)荷載下的恢復(fù)力特性和受力特征。
[關(guān)鍵詞]型鋼再生混凝土; 組合柱; 剛度退化; 滯回規(guī)則; 恢復(fù)力模型
中圖分類號:TU3982文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2015)11-0055-05
Research on four broken line-restoring force model of steel reinforced recycled
concrete composite columns
Ma Hui1, Xue Jianyang2, Zhang Xicheng2, Pan Xiuzhen1
(1 School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China;
2 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055, China)
Abstract:Based on the low reversed cyclic loading testes of steel reinforced recycled concrete composite columns, the skeleton curve calculation model of the composite columns was put forward, which included the cracking point, yield point, peak point and ultimate point of the composite columns. The feature points values and stiffness variation values of skeleton curve calculation model were determined through using the combining methods of the regression analysis and theoretical derivation. On this basis, according to the stiffness features and hysteretic characteristics of the composite columns, the stiffness degradation rules, unloading stiffness calculation formula and corresponding hysteresis rules of the composite columns were given. Finally, the four broken line-restoring force model of steel reinforced recycled concrete composite columns was established. The results show that the skeleton curves obtained by calculation are in good agreement with the theskeleton curves obtained by test. The four broken line-restoring force model well reflects restoring force features and mechanical characteristics of the composite columns under low reversed cyclic loading.
Keywords:steel reinforced recycled concrete; composite column; stiffness degradation; hysteresis rule; restoring force model
*國家自然科學(xué)基金項目(51408485,51178384),陜西省科技廳自然科學(xué)基礎(chǔ)研究計劃項目(2014JM7288),西安市建設(shè)科技項目(SJW2014025)。
作者簡介:馬輝,博士,講師,Email: mahuiwell@163.com。
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