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(1 福建工程學(xué)院福建省土木工程新技術(shù)與信息化重點(diǎn)實(shí)驗(yàn)室, 福州 350118; 2 福建建工集團(tuán)有限責(zé)任公司, 福州 350003; 3 同濟(jì)大學(xué)建筑設(shè)計(jì)院 (集團(tuán)) 有限公司, 上海 200092)

摘要: T 形配鋼型鋼混凝土(SRC)矩形截面柱能較好地符合邊柱實(shí)際非對(duì)稱受力特征,具有重要的工程應(yīng)用價(jià)值. 考慮型鋼壓屈約束效應(yīng)退化,修正 Mander 本構(gòu)模型的下降段,構(gòu)造約束混凝土受壓本構(gòu)新模型,并將修正的本構(gòu)模型應(yīng)用于 T 形配鋼 SRC 柱的靜力分析,討論長細(xì)比和荷載偏心率對(duì)柱受力性能的影響. 結(jié)果表明,修正后約束混凝土本構(gòu)模型較符合型鋼混凝土實(shí)際應(yīng)力-應(yīng)變特征;長細(xì)比的增大使 T 形鋼由局部屈服轉(zhuǎn)變?yōu)檎w屈服,構(gòu)件極限承載力略有降低;荷載偏心率的增大使 T 形配鋼 SRC 柱由小偏心受壓破壞發(fā)展為大偏心受壓破壞,構(gòu)件極限承載能力降低,但延性保持良好.

關(guān)鍵詞: T 形配鋼型鋼混凝土柱; 約束混凝土; 本構(gòu)模型; 長細(xì)比; 荷載偏心率

中圖分類號(hào):TU398. 9 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)12-0043-06

DOI:10. 19701 / j. jzjg. 20201448

Static analysis of T-shaped steel reinforced concrete columns based on the modified steel-constrainedconcrete constitutive

WU Chen1, ZHENG Zhihuang1, WANG Zongcheng2, XU Xiaoliang3

(1 Fujian Provincial Key Laboratory of Advanced Technology and Information in Civil Engineering , Fujian Universityof Technology, Fuzhou 350118, China; 2 Fujian Construction Engineering Group Co. , Ltd. , Fuzhou 350003;3 Tongji Architectural Design (Group) Co. , Ltd. , Shanghai 200092)

Abstract:T-shaped steel reinforced concrete ( SRC) rectangular section column is in good agreement with the actualasymmetric force characteristics of the side column and has important engineering application value. Considering thedegradation of restraint effect resulted from steel buckling, the descent section of the Mander constitutive was modified, anew constitutive model of constrained concrete was constructed and applied to the static analysis of T-shaped steel SRCcolumn. The effects of slenderness ratio and load eccentricity ratio on the mechanical properties of the columns werediscussed. The results show that the confined concrete constitutive model proposed is more in line with the actual stressstrain characteristics of steel reinforced concrete. The increase in slenderness ratio causes the T-shaped steel change frompartial yield to overall yield, and the ultimate bearing capacity of the member decreases slightly. The increase in loadeccentricity ratio results in a failure mode change from small eccentric compression to large eccentric compression, whichleads to the reduced ultimate bearing capacity and a favorable ductility.

Keywords:T-shaped steel reinforced concrete column; confined concrete; constitutive model; slenderness ratio; loadeccentricity ratio

∗福建省高校產(chǎn)學(xué)合作項(xiàng)目(2022H6032),福州市科技計(jì)劃項(xiàng)目(2021-P-048).

第一作者:吳琛,博士,教授,博士生導(dǎo)師,主要從事組合結(jié)構(gòu)抗震設(shè)計(jì)與性能研究,Email:wuchen2001@ 126. com.

[引用本文] 吳琛,鄭志煌,王宗成,等. 基于修正型鋼約束混凝土本構(gòu)的 T 形配鋼型鋼混凝土柱靜力分析[ J].建筑結(jié)構(gòu),2023,53(12):43-48,97. WU Chen ,ZHENG Zhihuang,WANG Zongcheng,et al. Static analysis of T-shapedsteel reinforced concrete columns based on the modified steel-constrained concrete constitutive [ J]. Building Structure,2023,53(12):43-48,97.