基于IFC标准的多构件重叠算量扣减研究

Research on Multi-component Overlap Deduction of Quantity Take-off Based on IFC

工程量的准确计算是建筑生命全周期成本控制的基础。传统的工程算量方式自动化程度较低、过程复杂且误差较大,严重影响造价管理工作的效率。BIM技术势必引发造价行业的变革,而IFC标准是国际公认的开放性最好的BIM数据交换标准。本文通过对IFC数据模型中算量相关信息的拆分和解析,提出"两级碰撞排查算法"。该算法利用三维模型的布尔运算,按照清单规则对多重叠构件进行准确的扣减计算,解决了同一模型在不同软件或不同建模路径下普遍存在的工程量计算不一致问题。此算法解决了现阶段算量方式存在的BIM数据难以共享的问题,表明IFC标准的推广和发展可以为三维算量提供新的思路。

Accurate quantity take-off is the basis of cost control during the life cycle of a building.However,the traditional quantity take-off method is of low degree of automation and complicated with large error,which seriously affects the efficiency of cost management.BIM technology is promising to trigger changes in the cost industry,and IFC is widely recognized as the best open BIM data exchange standard.Herein,a "two-level collision detection algorithm" is proposed by parsing the quantity-related information in the IFC data model.The algorithm uses Boolean operation of the three-dimensional model to conduct accurate deduction calculations on multi-overlapping components according to the inventory rule,solving the inconsistency problem of engineering quantity calculation when using different software or different modeling paths are used in the same model.This algorithm succeeds to make BIM data shareable,indicating that the promotion and development of IFC can provide a new strategy for three-dimensional calculations.