基于板-梁理论的哑铃形钢管混凝土拱平面外整体稳定研究  

Out-of-Plane Overall Stability Analysis of Dumbbell-Shaped CFST Arch Based on Plate-Beam Theory

作　　者：朱凯杰 张文福 厉昱秀[3] 孙陈 ZHU Kaijie;ZHANG Wenfu;LI Yuxiu;SUN Chen(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;School of Civil Engineering and Architecture,Nanjing Institute of Technology,Nanjing 211167,China;College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]南京工程学院,建筑工程学院,南京211167 [3]安徽建筑大学土木工程学院,合肥230601

出　　处：《建筑钢结构进展》2022年第10期52-58,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(51578120、51178087、52178143)。

摘　　要：哑铃形钢管混凝土拱因其良好的受力性能,在大跨度桥梁工程和建筑结构中得到大量的应用。以两端简支的哑铃形钢管混凝土拱为研究对象,基于板-梁理论推导了哑铃形截面平面外抗弯刚度、抗扭刚度和翘曲刚度计算公式。选取15个不同长细比、张角的钢管混凝土拱为研究对象,利用ANSYS建立有限元模型,验证其在纯弯和轴压作用下的平面外屈曲情况。研究表明:纯弯作用下哑铃形钢管混凝土拱弯扭屈曲荷载平均误差为4.6%,最大误差为6.2%,轴压作用下哑铃形钢管混凝土拱弯扭屈曲荷载平均误差为-7.5%,最大误差为-8.4%,证明了求解哑铃形钢管混凝土拱参数的合理性,可为实际工程提供设计参考。Due to its superior mechanical performance,the dumbbell-shaped concrete-filled steel tubular(CFST) arch is frequently used in long-span bridges and buildings. The computational formula for out-of-plane bending stiffness,torsional stiffness,and warping stiffness of the dumbbell section are determined using the plate-beam theory.Fifteen CFST arches of varying slenderness and field angle are chosen to develop finite element models using ANSYS,which validate the overall buckling under two distinct situations of pure bending and axial compression.According to the study,the average error of flexural-torsional buckling load of dumbbell-shaped CFST arch under pure bending is 4.6% and the highest error is 6.2%. The greatest error of flexural-torsional buckling load of a dumbbell-shaped CFST arch under axial compression is-8.4%,the average error is-7.5%. It demonstrates the accuracy of dumbbell-shaped section parameters derived from the plate-beam theory,which can give a reliable calculation approach for engineering applications.

关 键 词：板-梁理论 哑铃形 平面外稳定 钢管混凝土拱 

分 类 号：TU392.5[建筑科学—结构工程]