The traditional model of pier BIM based on knowledge pattern and action can realize batch model-ing,but due to multiple generation of model references,the instantiation process is slow and the database memory garbage is easily generated.In order to overcome the above defects,this paper proposes a new model-ing method,which first uses the component family module of the cable system to decompose the pier-level tem-plate into a two-level template separated from the database,and then develops a batch instantiation program of the pier by CAA,The program can retrieve the necessary model reference from the database according to sev-eral attribute values of the bridge Pier template,and generate the corresponding model instance to place in the skeleton coordinate system,so as to establish the whole bridge pier model quickly.The results show that this modeling method can greatly improve the modeling efficiency and save the database memory space,this paper also provides the basic thinking and method for other BIM research based on/CAA two development.%传统的基于Knowledge Pattern和action的桥墩BIM建模方法虽然可以实现批量建模,但是由于多次生成模型参考导致实例化过程缓慢并且容易产生数据库的内存垃圾.为了克服上述缺陷,提出一种全新的建模方法,该方法首先使用达索系统自带的Component Family模块将桥墩一级模板分解为离散于数据库中的二级模板,再通过CAA开发出桥墩批量实例化程序,该程序能够根据桥墩模板的几个属性值从数据库中检索出所需的模型参考,并生成对应的模型实例放置于骨架坐标系上,从而快速建立全桥桥墩模型.结果表明:本建模方法能够大幅度提高建模效率并节约数据库内存空间,本文也为基于达索/CAA二次开发的其他BIM研究提供了基本思路和方法.
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