市政技术2026，Vol.44Issue(9)：13-24,12.DOI:10.19922/j.1009-7767.2026.09.013
装配式叠合箱涵连接节点的构造与力学试验研究
Study on Construction and Mechanical Test of Joints for Prefabricated Composite Box Culverts
摘要
Abstract
Prefabricated composite box culverts combine prefabricated thin-walled components with cast-in-place composite layers,overcoming drawbacks of conventional prefabricated box culverts such as heavy self-weight and difficult transportation.As the pivot for internal-force transfer of structures,transverse connection joints directly determine the overall mechanical performance of the structure.Accordingly,four joint construction schemes were designed,and their mechanical behaviours and failure mechanisms were investigated by full-scale tests combined with numerical simulation.The results show that Specimen of Scheme 4,the additional-reinforcement haunch-strengthened joint,achieves the optimal performance,whose structural continuity and deformability are equivalent to those of cast-in-place joints.Its experimental cracking load is 1.23～1.33 times those of other joint specimens,and the experimental peak load is 1.08～1.18 times the simulated value,indicating sufficient safety margin.This study further reveals the three-dimensional cooperative force-bearing mechanism of this type of joint:confinement from circular boop reinforcement effectively improves the strength of core concrete;additional reinforcements guar-antee the continuity of internal-force transfer;haunch strengthening optimizes the stress distribution in joint regions.The three factors jointly realize efficient force transfer under combined bending-shear action.This research verifies the feasibility of the prefabricated composite box-culvert system and provides experimental basis and theoretical support for joint optimization design.关键词
装配式叠合箱涵/横向连接节点/受力性能/足尺试验/节点构造形式/三维协同机制Key words
prefabricated composite box culvert/transverse connection joint/mechanical performance/full-scale test/joint configuration/three-dimensional cooperative mechanism分类
交通工程引用本文复制引用
李忠龙,徐伟量,葛钊旭,杨世硕,王奕航,高庆飞,仝运涛,马志华..装配式叠合箱涵连接节点的构造与力学试验研究[J].市政技术,2026,44(9):13-24,12.基金项目
国家自然科学基金项目:寒区亚健康钢-混组合梁桥服役性能退化机制与限载方法研究(52478308) （52478308）
黑龙江省交通运输厅科技项目:寒区装配式叠合结构的力学行为和优化设计研究(HJK2023B023) （HJK2023B023）
