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（1 南昌工程學(xué)院土木與建筑工程學(xué)院， 南昌 330099；  2 江西省水利土木特種加固安全監(jiān)控工程研究中心， 南昌 330099; 3 廣東工業(yè)大學(xué)土木與交通工程學(xué)院， 廣州 510006）

［摘要］針對(duì)三向斜交型異型復(fù)雜鋼屋蓋的結(jié)構(gòu)特點(diǎn)，比選了傳統(tǒng)網(wǎng)架和空腹網(wǎng)格結(jié)構(gòu)兩種方案，詳細(xì)介紹了兩種方案的優(yōu)劣，提出了新型空腹齒輪型剛接節(jié)點(diǎn)方案并采用多種有限元軟件對(duì)其進(jìn)行分析。結(jié)果表明，在滿(mǎn)足安全的前提下，選擇空腹網(wǎng)格結(jié)構(gòu)能夠降低用鋼量、施工方便、經(jīng)濟(jì)性好；利用von Mises屈服準(zhǔn)則和雙線性隨動(dòng)強(qiáng)化準(zhǔn)則對(duì)新型空腹齒輪型剛接節(jié)點(diǎn)進(jìn)行非線性分析，得到了節(jié)點(diǎn)初始剛度，結(jié)果表明，新型空腹齒輪型剛接節(jié)點(diǎn)剛度大，符合“強(qiáng)節(jié)點(diǎn)、弱構(gòu)件”的設(shè)計(jì)要求。

［關(guān)鍵詞］空腹網(wǎng)格結(jié)構(gòu)； 三向斜交型； 結(jié)構(gòu)選型； 節(jié)點(diǎn)分析

中圖分類(lèi)號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)23-0012-04

Structural system selection of complex spatial grid structure and performance analysis of a new type rigid joint

Liu Kai1,2, Wu Jun1, Yan Tao1，2, Li Jiapo1，3, Hong Cheng1,2

(1 School of Civil Engineering and Architecture，Nanchang Institute of Technology，Nanchang 330099， China; 2 Jiangxi Provincial Engineering Research Center of the Special Reinforcement and Safety Monitoring Technology in Hydraulic & Civil Engineering，Nanchang 330099， China； 3 Faculty of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract:Considering structural characteristics of three-dimensional skew crossing complicated steel roof, two schemes of traditional grid structure and open-web grid structure were compared, and the advantages and disadvantages of the two schemes were introduced in detail. A new type of open-web gear-type rigid joint scheme was proposed and analyzed by using a set of finite element software. The results show that under the premise of meeting the safety, selecting open-web grid structure can reduce the amount of steel, and lead to convenient construction and good economic performance. Nonlinear analysis was conducted on the  new type of open-web gear-type rigid joint using von Mises yield criterion and the bilinear kinematic hardening criterion, to obtain the initial stiffness of joint. The results show that the new type of open-web gear-type rigid joint has large stiffness, meeting the design requirements of “strong joint and weak member”.

Keywords:open-web grid structure; three-dimensional skew crossing; structural system selection; joint analysis

*江西省教育廳科技項(xiàng)目（GJJ151143），國(guó)家自然科學(xué)青年基金項(xiàng)目（51108227，51308277）。

作者簡(jiǎn)介：劉凱，博士，教授，Email：kkk417@163.com。