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(1 河北工程大學(xué)土木工程學(xué)院, 邯鄲 056038;2 天津大學(xué)濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室, 天津 300072)

摘要: 焊接空心球節(jié)點(diǎn)在制作和焊接過(guò)程中,會(huì)引起壁厚減薄率和焊接殘余應(yīng)力等初始缺陷,從而導(dǎo)致節(jié)點(diǎn)的力學(xué)性能的明顯變化. 采用有限元數(shù)值模擬方法,研究了焊接空心球節(jié)點(diǎn)制作和焊接過(guò)程中,壁厚減薄率和焊接殘余應(yīng)力的形成機(jī)理,研究了其對(duì)焊接空心球節(jié)點(diǎn)極限承載力的影響規(guī)律,發(fā)現(xiàn)壁厚減薄率和焊接殘余應(yīng)力對(duì)節(jié)點(diǎn)力學(xué)性能有較為顯著的影響,建議在今后設(shè)計(jì)時(shí)適當(dāng)考慮.

關(guān)鍵詞: 焊接空心球節(jié)點(diǎn); 沖壓過(guò)程; 焊接殘余應(yīng)力; 壁厚減薄率; 極限承載力

中圖分類號(hào):TU391 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)03-0103-06

DOI:10. 19701 / j. jzjg. 20201798

Study on influence of stamping and forming process on mechanical properties of welded hollow spherical joints

LIU Hongbo1,2, GAO Haotian2, CHEN Zhihua2, QIU Can1

(1 School of Civil Engineering, Hebei University of Engineering, Handan 056038, China; 2 Key Laboratory ofCoastal Civil Engineering Structure and Safety, Ministry of Education, Tianjin University, Tianjin 300072, China)

Abstract: In the manufacture and welding process of welded hollow spherical joints (WHSJs), initial imperfection such aswall thickness reduction and welded residual stress will be caused, which will lead to obvious changes in mechanicalproperties of joints. The formation mechanism and influence on the ultimate bearing capacity of wall thickness reduction andwelded residual stress caused by manufacture and welding process of WHSJs was studied by using the finite element analysismethod. The results show that the wall thickness reduction and welded residual stress have significant effects on themechanical properties of WHSJs, which should be considered properly in the future design.Keywords: welded hollow spherical joint; stamping process; residual stress; wall thickness reduction; ultimatebearing capacity

∗國(guó)家自然科學(xué)基金面上項(xiàng)目(51878443).

第一作者:劉紅波,博士,教授,博士生導(dǎo)師,主要從事鋼結(jié)構(gòu)與空間結(jié)構(gòu)研究,Email:hbliu@ tju. edu. cn.

[引用本文] 劉紅波,高昊天,陳志華,等. 沖壓成型過(guò)程對(duì)焊接空心球節(jié)點(diǎn)力學(xué)性能影響研究[ J]. 建筑結(jié)構(gòu),2023,53(3):103-108. LIU Hongbo,GAO Haotian ,CHEN Zhihua,et al. Study on the influence of stamping and formingprocess on mechanical properties of welded hollow spherical joints[J]. Building Structure,2023,53(3):103-108.