基于精细化模型的整体预制组合箱梁结构优化及施工工艺研究  

Research on Structural Optimization and Construction Technology of Integral Prefabricated Composite Box Beam Structure Based on Refined Model

作　　者：金宇豪 孙斌[1] 孙九春[2] 庞丹丹 JIN Yuhao;SUN Bin;SUN Jiuchun;PANG Dandan(College of Civil Engineering,Tongji University;Tengda Construction Group Co,.Ltd.)

机构地区：[1]同济大学 [2]腾达建设集团股份有限公司

出　　处：《广东建材》2024年第2期120-123,共4页Guangdong Building Materials

摘　　要：组合结构以其整体受力的经济性、发挥两种材料优势的合理性以及便于施工等优势,已在中小跨径桥梁中得到广泛应用。整体预制组合梁桥可以在兼顾组合结构优势的同时,显著降低现场作业量,加快施工速度。本研究依托某整体预制组合箱梁桥,建立精细化有限元模型,在考虑施工过程的同时,兼顾钢板、剪力钉和混凝土的之间的复杂相互作用。对钢底板厚度、钢腹板厚度和跨中压重大小开展参数分析,结果表明,增大钢底板厚度和钢腹板厚度可以一定程度上降低钢梁应力,但对混凝土受力影响不明显;增大跨中压重可以显著改善负弯矩区混凝土顶板的受力性能,抑制成桥后负弯矩区混凝土开裂。Composite structures have been widely used in small and medium-sized span bridges due to their advantages in overall force economy,rationality of utilizing the advantages of two materials,and ease of construction.The overall prefabricated composite beam bridge can significantly reduce onsite operations and accelerate construction speed while taking into account the advantages of the composite structure.This study relies on a prefabricated composite box girder bridge to establish a refined finite element model,taking into account the complex interaction between steel plates,shear connectors,and concrete while considering the construction process.A parameter analysis was conducted on the thickness of the steel bottom plate,the thickness of the steel web plate,and the weight of the span.The results showed that increasing the thickness of the steel bottom plate and the steel web plate can reduce the stress of the steel beam to a certain extent,but the effect on the stress of the concrete is not significant.Increasing the mid span weight can significantly improve the mechanical performance of the concrete roof in the negative bending moment area and suppress the cracking of concrete in the negative bending moment area after the bridge formation.

关 键 词：整体预制 组合梁桥 参数分析 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U445.4[交通运输工程—道路与铁道工程]