无粘结预应力混凝土梁有限元模拟  

FINITE ELEMENT SIMULATION OF UNBONDED PRESTRESSED CONCRETE BEAM

作　　者：刘玉送 王卫锋[1] 黄仕平[1] 杜立凡 LIU Yusong;WANG Weifeng;HUANG Shiping;DU Lifan(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《低温建筑技术》2020年第4期49-53,共5页Low Temperature Architecture Technology

摘　　要：文中综合考虑了现有的无粘结预应力混凝土结构的数值模拟方法,通过引入虚拟预应力筋和设置局部坐标系,提出了一种改进的无粘结预应力筋模拟方法。同时运用了一组合适的混凝土材料本构模型,使模拟计算可在ABAQUS软件的标准静态隐式分析中进行。对两根试验梁进行了数值模拟,无粘结预应力筋的应力分布情况合理,数值模拟结果和试验结果的荷载-位移曲线吻合较好,证明了文中提出的建模方法的合理性和可行性,可为无粘结预应力混凝土结构的建模分析提供参考。This paper comprehensively considers the existing numerical simulation methods of unbonded prestressed concrete structures.By introducing virtual prestressed tendons and setting local coordinate systems,an improved simulation method of unbonded prestressed tendons is proposed.At the same time,a set of appropriate concrete material constitutive relations is used,so that the simulation calculation can be performed in the standard static implicit analysis of ABAQUS software.Two tested beams are simulated where the stress distribution of the unbonded prestressed tendons are reasonable.Finally,the load-displacement curves of the numerical simulation results are in good agreement with those of the experimental results,which proves that the proposed modeling method is reasonable and feasible.It can provide a reference for modeling analysis of unbonded prestressed concrete structures.

关 键 词：无粘结 混凝土梁 虚拟预应力筋 局部坐标系 

分 类 号：TU375.1[建筑科学—结构工程]