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（1 南昌工程學(xué)院土木與建筑學(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 江西省水利土木工程基礎(chǔ)設(shè)施安全重點(diǎn)實(shí)驗(yàn)室， 南昌 330099； 4 江西省建工集團(tuán)有限責(zé)任公司， 南昌 330029）

［摘要］針對(duì)傳統(tǒng)等高線法建立異形空間網(wǎng)架結(jié)構(gòu)時(shí)出現(xiàn)的網(wǎng)格劃分質(zhì)量差、桿件長(zhǎng)度變化大等問題，提出了使用參數(shù)化P-C法建模的新思路。以南昌市某異形網(wǎng)架結(jié)構(gòu)為例，利用Rhino平臺(tái)的Grasshopper插件進(jìn)行參數(shù)化P-C法建模，再將此模型與傳統(tǒng)等高線法建立的模型導(dǎo)入3D3S軟件中進(jìn)行計(jì)算對(duì)比。結(jié)果表明：參數(shù)化P-C法移植性強(qiáng)，類似工程仍可適用；此法建立的模型曲面擬合度高，網(wǎng)格劃分效果好，后期調(diào)整模型方便，桿件長(zhǎng)度均勻且利用率高，可降低用鋼量。

［關(guān)鍵詞］空間網(wǎng)架結(jié)構(gòu)； 參數(shù)化P-C法； 網(wǎng)格劃分； 結(jié)構(gòu)比選

中圖分類號(hào)：TU356文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)21-0081-03

New structural modeling method for special-shaped spatial grid structure based on parametric design of Grasshopper & structural comparison and selection

Liu Kai1,2,3， Chen Xiang4， Yan Tao1

(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 Jiangxi Province Key Laboratory of Hydraulic & Civil Engineering Infrastructure Security， Nanchang 330099, China；4 Jiangxi Construction Engineering (Group) Co., Ltd.， Nanchang 330029, China)

Abstract:The traditional contour method has some problems, such as poor meshing quality and large variation of member length when establishing special-shaped space truss structure. A new idea of parametric P-C modeling was put forward. Taking a special-shaped grid structure in Nanchang as an example case,  parametric P-C model was established by using Grasshopper plug-in of Rhino platform, and then the model was imported into 3D3S software to compare with the traditional contour method. The results show that  parametric P-C method is suitable for similar projects because of its strong transplantability; the model established by this method has high fitting degree of curved surface, good meshing effect, convenient adjustment of later model, uniform length of rod and high utilization rate, and can reduce steel consumption.

Keywords:spatial grid structure; parametric P-C method; mesh subdivision; structural comparison and selection

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

通訊作者：陳翔，碩士，Email：1041131658@qq.com。