异形钢结构屋面参数化设计方法研究

Study on Parametric Design Method of Special-shaped Steel Structure Roof

参数化设计作为BIM建模应用阶段必须考虑的一个环节,能够大幅提升模型生成和修改速度,从而提高建模效率和工作质量。其中,异形钢结构屋面BIM参数化设计作为一类典型的BIM参数化技术应用案例,尤为突显异形建筑形体建模的难度。本文以某体育场作为工程案例,基于Grasshopper可视化编程环境建立一种异形钢结构屋面快速建模方法,实现了参数化设计在实际项目中的应用可行性。结果表明:通过Grasshopper可视化程序编写薄壁圆管截面和H型钢截面构件生成程序经组合后,在该程序内直接拾取不同图层的节间线段进行构件位置定位以及生成拉伸路径,能够快速生成异形钢结构屋面模型,降低建模时间,提高构件尺寸调整效率。在方案设计阶段,该种方法具备很高的实用性。

Parametric design is a crucial factor to consider in the BIM modeling application stage,as it can greatly enhance the speed of model generation and modification,leading to improved work quality and modeling efficiency.BIM parametric design of special-shaped steel structure roof is a prime example of its application,particularly in the challenge of modeling complex architectural shapes.To address this,this paper outlines a rapid modeling method for special steel structure roofs based on Grasshopper visual programming environment,using a stadium as a case study.The program combines Grasshopper visualization program and the internode line segments for component position positioning and stretching path generation,allowing for quick model generation,efficient component size adjustment,and reduced modeling time.This method is highly practical in the protocol design stage and successfully demonstrates the feasibility of parametric design in actual projects.