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(1 四川省建筑科學(xué)研究院， 成都 610081； 2 同濟(jì)大學(xué)土木工程學(xué)院建筑工程系， 上海 200092)
［摘要］采用數(shù)值模擬手段對考慮粘結(jié)作用及抗剪栓釘傳力的巨型鋼管混凝土柱共同工作性能進(jìn)行分析。首先介紹了ABAQUS程序中的材料本構(gòu)模型、鋼管、混凝土界面模型和抗剪栓釘簡化本構(gòu)模型。通過與相關(guān)文獻(xiàn)試驗結(jié)果進(jìn)行對比，充分驗證了本文理論模型的合理性與精確度。在此基礎(chǔ)上，分別對只考慮粘結(jié)作用的巨型鋼管混凝土柱和考慮粘結(jié)作用+抗剪栓釘?shù)木扌弯摴芑炷林M(jìn)行數(shù)值參數(shù)分析，主要考察巨型柱截面尺寸、管壁寬厚比、粘結(jié)強(qiáng)度、栓釘布置間距等對豎向荷載傳遞的影響。結(jié)果表明，粘結(jié)作用對混凝土共同工作性能的影響有限，單純依靠粘結(jié)傳力，鋼管、混凝土兩者不能夠很好地共同工作；設(shè)置抗剪栓釘提高了巨型鋼管混凝土柱共同工作性能。最后建議不應(yīng)完全依賴粘結(jié)作用與抗剪栓釘傳力，在設(shè)計時應(yīng)通過設(shè)置足夠的傳力構(gòu)造來保證巨型柱鋼管、混凝土共同工作。
［關(guān)鍵詞］巨型鋼管混凝土柱； 荷載傳遞路徑； 粘結(jié)作用； 抗剪栓釘傳力； 共同工作性能
中圖分類號：TU392-1, TU317-1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)05-0109-08
Analysis of co-working performance of giant concrete filled steel tubular columns considering bonding effect and shearing stud force
Zhang Yuanzhi1,2， Luo Jinhui2, Li Yuanqi2
(1 Sichuan Institute of Building Research, Chengdu 610081, China; 2 Department of Structural Engineering, College of Civil Engineering, Tongji University, Shanghai 200092， China)
Abstract:Co-working performance of giant concrete filled steel tubular(CFT) columns was analyzed by finite element method，which considering the influence of bond strength and shear stud. Firstly, the constitutive model of material, interaction of concrete and steel and the simplified constitutive model of shear stud in finite element software ABAQUS was introduced. Secondly，the simulation result was compared with the experimental result of relative literature, which verified the reasonableness and accuracy of simulation result. Furthermore, parametric analysis on giant CFT columns considering nature bond, nature bond and shear stud was conducted. The factors including the size of giant CFT columns，width to thickness ratio of steel tube，the value of bond strength and spacing of stud were considered, and the influence of these factors on load transfer between core concrete and steel tube was investigated. It shows that the numerical simulation work that core concrete in giant CFT columns could barely work together with steel tube simply by nature bond. The co-working performance was enhanced after the shear stud was set on the inner surface of steel tube. At last, it was suggested that load transfer in giant CFT columns should not only simply depended on nature bond and shear stud. The design should be done by setting enough force transmission structure to ensure that the giant column steel pipe and concrete work together.
Keywords:giant concrete filled steel tubular columns; load transfer path; bond; load transferred by shear stud; co-working performance
*國家自然科學(xué)基金（51208375）。
作者簡介：張元植，博士，工程師，Email: zyzyuanzhi@163.com。
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