管幕-结构法构件抗弯特性研究  

Study on the Flexural Capacity of Component of Pipe Curtain Structure

作　　者：韩现民 梁显 肖明清[3] 胡大伟[3] HAN Xianmin;LIANG Xian;XIAO Mingqing;HU Dawei(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang 050043,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043 [3]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2021年第5期134-140,148,共8页Railway Standard Design

基　　金：国家电网公司科技研究项目(5204BB18001G);中铁第四勘察设计院集团有限公司科研项目(2016K33)。

摘　　要：为揭示管幕-结构法构件抗弯特性,以下穿太原火车站工程为依托,采用理论计算和数值模拟方法,对钢管与混凝土间界面状态、构件截面几何特征和管壁厚度等对结构构件抗弯能力影响进行研究。结果表明:(1)钢管与混凝土界面在自由滑移状态下的截面极限抗弯承载力约为完全连接状态的80%左右;考虑钢管与混凝土之间的粘结力作用时,截面的抗弯承载力为完全连接状态的93%,比自由滑移状态增大13%;(2)截面几何特征对承载能力影响较大;(3)截面极限抗弯承载力随管壁厚度的减小而呈线性减小规律;(4)随着荷载增加,结构变形由线性向非线性发展。To disclose the flexural capacity of structure component of Pipe curtain-Structure Method(PSM),the project crossing Taiyuan Railway Station constructed by PSM is taken as an example to study the influence of such main factors on the flexural capacity as the connecting states between steel pipe and concrete,the geometric characteristics of section and the wall thickness of steel pipe based on theoretical calculation and numerical simulation.The results show that:(1)The ultimate flexural capacity of the section under free sliding state between steel pipe and concrete is about 80%of that under the fully connected state.With the cohesive force between steel tube and concrete considered,the bending capacity of the section is 93%of that of the fully connected state,which is 13%higher than that of the free sliding state.(2)Geometric characteristics of the section has great influence on the bearing capacity.(3)The ultimate bending capacity of the section decreases linearly with the decrease of the wall thickness of steel tube.(4)Structure deformation develops from linear to non-linear with the increase of load.

关 键 词：管幕-结构法 构件抗弯承载力 理论计算 钢管与混凝土界面状态 构件截面几何特征 钢管壁厚 

分 类 号：TU47[建筑科学—结构工程] U455[建筑科学—土工工程]