首页|装配式地铁车站CHC型钢-混凝土组合接头的力学行为分析

装配式地铁车站CHC型钢-混凝土组合接头的力学行为分析

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装配式地铁车站在不确定性的施工荷载与环境荷载联合作用下,其接头弯曲刚度表现出明显非线性特征,进而使接头受力和变形演化过程复杂化.为揭示装配式地铁车站CHC(C型钢+H型钢+C型钢)型钢-混凝土组合接头在轴力和弯矩共同作用下的弯曲变形发展规律,提出一种包含5种弯曲模式的新型接头力学模型.通过求解不同弯曲模式下接头变形及其发展规律,讨论各弯曲模式的应变区域分布及其识别方法;最后结合力学模型以及监测数据,获取环向接头受力的时空分布特征.结果表明:装配式地铁车站接头截面的轴力计算值在0～30 MN之间,弯矩计算值在-3～2 MN·m之间,接头大部分处于弯曲模式I,其整体结构力学的响应对施工荷载和覆土回填等影响因素更为敏感.
Mechanical Behavior Analysis of CHC Steel-concrete Composite Joints in Prefabricated Subway Stations
Under the combined effects of uncertain construction loads and environmental loads,the bending stiff-ness of joints in prefabricated subway stations exhibits significant nonlinear characteristics,complicating the pro-cess of force and deformation evolution at the joints.To reveal the bending deformation development of CHC(C-shaped steel+H-shaped steel+C-shaped steel)steel-concrete composite joints in prefabricated subway stations under the combined action of axial force and bending moment,a new joint mechanical model with five bending modes is proposed.By solving the deformation and its evolution under different bending modes,the strain distribu-tion regions of each bending mode and the identification methods are discussed.Finally,based on the mechanical model and monitoring data,the spatial-temporal distribution characteristics of circumferential joint forces were ob-tained.The results indicate that the calculated axial force of the prefabricated subway station joints ranges between 0 and 30 MN,and the bending moment ranges between-3 and 2 MN·m.Most of the joints are in Bending Mode I,and the mechanical response of the overall structure is more sensitive to construction loads and backfill influences.

Prefabricated subway stationSteel-concrete composite jointBending mode identificationNonlinear characteristicsInternal force analysis

郭成祥、张燕丽、黄林冲、韩冰、吕文华、梁禹

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中铁十四局集团隧道工程有限公司,济南 250000

中山大学土木工程学院,珠海 519000

隧道工程灾变防控与智能建养全国重点实验室,广州 510000

中山大学·深圳航空航天学院,深圳 518107

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装配式地铁车站 型钢-混凝土组合接头 弯曲模式识别 非线性特征 内力分析

国家自然科学基金广东省基础与应用基础研究基金广东省基础与应用基础研究基金深圳市科技计划项目可持续发展专项

523784272023A15150302582024A1515012623KCXFZ20201221173207020

2024

10.13807/j.cnki.mtt.2024.05.007

现代隧道技术
中铁西南科学研究院有限公司 中国土木工程学会隧道及地下工程分会

现代隧道技术

CSTPCD北大核心
影响因子：1.493
ISSN：1009-6582
年,卷(期)：2024.61(5)