考虑车辆作用的中小跨径装配式钢-混组合梁的Midas建模研究

Midas Modeling Study of Medium and Small Span Prefabricated Steel-Concrete Composite Beams Considering Vehicle Effects

摘要

装配式桥梁凭借施工快、质量高、环境影响小等优势，在中小型桥梁建设中应用广泛。本文利用Midas Civil软件开展了装配式钢-混组合梁桥的精细建模分析。考虑了混凝土板中的钢筋布置、钢筋混凝土桥面板和工字形钢梁之间的连接。以跨径为30m的双车道装配式钢-混组合梁桥为例进行建模和结构计算，组合桥结构按二级公路设计，其荷载标准按照《公路工程技术标准》中Ⅰ级公路设计。通过与等效简化的简支梁力学模型进行内力结果比较验证建模的有效性，为中小跨径装配式钢-混组合梁桥的有限元建模与结构分析提供参考。

Abstract

Prefabricated bridges, with advantages such as fast construction, high quality, and minimal environmental impact, are widely used in the construction of small to medium-sized bridges. This paper uses Midas Civil software to conduct detailed modeling and analysis of prefabricated steel-concrete composite beam bridges. It takes into account the arrangement of reinforcement in the concrete slabs and the connection between the reinforced concrete deck slab and the I-shaped steel beams. A dual-lane prefabricated steel-concrete composite beam bridge with a span of 30 meters is modeled and structurally calculated as an example, with the composite bridge structure designed according to a secondary highway and its load standards based on Class I highway design in the “Highway Engineering Technical Standards.” The validity of the modeling is verified by comparing internal force results with those of an equivalently simplified simply supported beam mechanical model, providing a reference for finite element modeling and structural analysis of prefabricated steel-concrete composite beam bridges with small to medium spans.

关键词

装配式钢-混组合梁桥 / Midas软件建模 / 车辆荷载 / 内力计算

Key words

prefabricated steel-concrete composite girder bridge / Midas software modeling / vehicle load / internal force calculation

参考文献

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基金资助

国家级大学生创新训练计划项目(202512026039)