(1 长沙理工大学土木工程学院， 长沙 410004； 2 中机国际工程设计研究院有限责任公司，长沙 410007； 3 湖南顺天建设集团有限公司， 长沙 410008) 

［摘要］弧形梁因造型优美而广泛应用于高层建筑结构。在竖向荷载作用下，弧形梁承受弯矩、剪力、扭矩等，受力情况复杂。以某混凝土弧形梁结构为研究对象，采用多种有限元软件对其进行受力分析。采用SAP2000建立不同楼板约束条件下的弧形梁结构有限元模型，并对其在竖向荷载下的弯矩、扭矩等内力分布规律进行研究。基于ABAQUS通用程序，建立可考虑材料非线性和损伤的结构三维精细有限元模型，研究有无楼板约束对弧形梁结构承载性能的影响。结果表明，该弧形梁结构设计安全余量较大；楼板对弧形梁的扭转变形有明显的约束作用，使该弧形梁的曲线和直线段部分正负扭矩较均衡；楼板约束作用能显著增强弧形梁结构的承载能力。 

［关键词］混凝土弧形梁；受力性能；抗扭性能；楼板厚度 

中图分类号：TU398 文献标识码：A文章编号：1002-848X(2021)21-0054-05

Study on mechanical behavior of a concrete curved beam structure considering floor constraint 

LIU  Zhi1,  JIANG  Youbao1,  TAN  Guangyu2,  CHEN  Fanghong3,  HU  Zhihai2,  XIAO  Zhi2,  JIANG  Yu1,  DENG  Yunfeng1 

(1 School of Civil Engineering, Changsha University of Science and Technology, Changsha 410004， China；2 Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410007， China；3 Hunan Skyer Construction Group Co., Ltd., Changsha 410008， China) 

Abstract: Curved beam is widely used in high-rise building due to its beautiful shape. Under the vertical load, curved beam often bears bending moment, shearing force, torque and so on, and its force situation is complicated. Taking a concrete curved beam structure as an example, its mechanical analysis was carried out by using a variety of finite element software. SAP2000 was used to build the finite element model of the curved beam structure with different floor constraints, and the distributions of internal force such as moment and torque under the vertical load were studied. Based on the general program ABAQUS, a three-dimensional finite element model considering material nonlinearity and damage was established to study the influence of floor constraints on the bearing capacity of the curved beam structure. The results show that there is a large margin of safety for the design of the curved beam; the floor has a significant effect on the constrains of torsional deformation for the curved beam, which makes the positive and negative torques more balanced for the curved section and the straight section of the curved beam; the floor constraints can enhance the bearing capacity of the curved beam structure significantly. 

Keywords:concrete curved beam； mechanical behavior； torsion resistance performance； thickness of the floor

*国家自然科学基金项目(51678072)，中机国际工程设计研究院有限责任公司科研项目(CX-B-2020-0001)，基于拓扑优化的3d打印混凝土异形曲面结构成型(SJCX202022)。

 作者简介：刘志，硕士，Email:1411238985@qq.com； 通信作者：蒋友宝，博士，教授，Email: jiangybseu@163.com。