（1 南昌工程学院土木与建筑学院， 南昌 330099；  2 江西省水利土木特种加固安全监控工程研究中心，南昌 330099； 3 江西省水利土木工程基础设施安全重点实验室， 南昌 330099； 4 江西省建工集团有限责任公司， 南昌 330029）

［摘要］针对传统等高线法建立异形空间网架结构时出现的网格划分质量差、杆件长度变化大等问题，提出了使用参数化P-C法建模的新思路。以南昌市某异形网架结构为例，利用Rhino平台的Grasshopper插件进行参数化P-C法建模，再将此模型与传统等高线法建立的模型导入3D3S软件中进行计算对比。结果表明：参数化P-C法移植性强，类似工程仍可适用；此法建立的模型曲面拟合度高，网格划分效果好，后期调整模型方便，杆件长度均匀且利用率高，可降低用钢量。

［关键词］空间网架结构； 参数化P-C法； 网格划分； 结构比选

中图分类号：TU356文献标识码：A文章编号：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

*江西省教育厅科技项目（GJJ151143），国家自然科学青年基金项目（51108227，51308277）。

通讯作者：陈翔，硕士，Email：1041131658@qq.com。