变高连续钢桁梁BIM正向设计

BIM Forward Design of Continuous Steel Truss Beams with Variable Heights

狮子洋过江通道新沙高架桥为双层变高连续钢桁梁桥,设计采用参数驱动模块化设计,包含全桥桁架系统线、标准组件(节点、弦杆、腹杆等)、节段模型以及全桥BIM模型。以全桥桁架系统线为骨架,根据结构形式将桁架细分为数个标准组件,通过参数驱动标准组件组装成节段模型以及全桥模型,并自动生成施工图。通过参数驱动的标准组件,可匹配双层变高等多种系统线形式的钢桁梁,其三维模型与施工图尺寸均与参数链接,可实现自动更新。应用此BIM正向设计思路,可实现钢桁梁快速参数化出图,并且可以适用于多种系统线、多种截面形式的钢桁梁桥,提高了设计效率与准确率。

The Xinsha Viaduct of Shiziyang Link Project is a double-layer variable height continuous steel truss bridge structure.The design adopts parameter-driven modular solution,including the whole bridge truss system line,standard components(nodes,strings,belly rods,etc.),segment model and BIM model of the whole bridge.According to the structure form,the trusses are subdivided into several standard components.The standard components are assembled into the segment model and the whole bridge model by driving parameters,and the construction drawings are generated automatically.Through the standard components driven by parameters,the steel girder can be matched with a variety of system line forms of double-layer variable height,and its three-dimensional model and construction drawing dimensions are linked to the parameters,which can be automatically updated.By applying this BIM forward design idea,the drawing of steel truss beams can be quickly parameterized,and can be applied to steel truss bridges with various system lines and cross sections,improving the design efficiency and accuracy.