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原文传递 Novel Finite Element Analysis of Curved Concrete Box Girders Using Hybrid Box Elements

题名：	Novel Finite Element Analysis of Curved Concrete Box Girders Using Hybrid Box Elements
正文语种：	eng
作者：	Song, Taiyu;Yang, C. S. Walter;Scott, David W.;Shen, Yin;Li, Guoping
作者单位：	Tongji Architectural Design Grp Co Ltd 1230 Siping Rd Shanghai 200092 Peoples R China\|Tongji Univ Dept Bridge Engn 1239 Siping Rd Shanghai 200092 Peoples R China;Georgia Inst Technol Sch Civil & Environm Engn 790 Atlantic Dr Atlanta GA 30332 USA;Georgia Southern Univ Dept Civil Engn & Construct POB 8077 Statesboro GA 30460 USA;Tongji Univ Dept Bridge Engn 1239 Siping Rd Shanghai 200092 Peoples R China;Tongji Univ Dept Bridge Engn 1239 Siping Rd Shanghai 200092 Peoples R China
关键词：	Orthotropic constitutive model;Curved shell element;Hybrid element;Nonlinear finite element analysis;Curved concrete girders
摘要：	Horizontally curved concrete bridges are widely used in urban viaducts and overpasses all over the world. A box cross-section is often used in curved concrete girders because of its high resistance to both bending and torsion. This study focuses on the development of a new finite element analysis (FEA) methodology incorporating a novel formulation for curved box sections using orthotropic constitutive models for reinforced concrete, along with a layered shell theory approach. In the new approach, the box section is treated as a frame consisting of curved shell elements modeling webs and flanges and curved beam elements in the web-flange junctions. The use of shell and beam elements in the formulation significantly reduces the number of elements needed to model the box-section girder while maintaining the accuracy of the model. A degenerate superparametric shell element with reduced integration is used to avoid shear-locking, membrane-locking, and zero-energy problems. Prestrain effects are considered in the formulation to account for prestressing forces. The simulation results are compared to the available experimental results on four straight and curved, reinforced and prestressed, concrete box -section girders, with good agreement in terms of the deflections, twist angles, and strains in the prestressed reinforcement. Some critical issues in the analysis of concrete box girders, such as postpeak-strength behaviors, distortion of box section, are also discussed. (c) 2020 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of Structural Engineering
卷：	147
期：	1
页码：	04020284.1-04020284.18