Linear Analysis and Simulation of Interfacial Slip Behaviour for Composite Box Girders.pdf

Journal of Theoretical and Applied Mechanics, Sofia, 2014, vol. 44, No. 1, pp. 79–96 DOI: 10.2478/jtam-2014-0005 LINEAR ANALYSIS AND SIMULATION OF INTERFACIAL SLIP BEHAVIOUR FOR COMPOSITE BOX GIRDERS ? Pengzhen Lu Faculty of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, P. R. China, e-mail:pengzhenlu@zjut.edu.cn Pengzhen Lu, Changyu Shao Shanghai Municipal Engineering Design and Research Institute, Shanghai 200092, P. R. China, e-mail:pengzhenlu@zjut.edu.cn Renda Zhao School of Civil Engineering Southwest, Jiaotong University, Chengdu 610031, P. R. China [Received 12 June 2013. Accepted 10 March 2014] Abstract. The slip at the steel-concrete interface in steel-concrete com- posite beams was studied analytically and numerically. A theoretical description for steel-concrete composite box beams with partial shear in- teraction based on the partial interaction theory was derived, and equi- librium of the rotation angle w′ was introduced to allow convenient com- putation of deformation of composite box beams. Numerical simulations of steel-concrete composite box beams subjected to concentrated load and/or uniformly distributed load were conducted. The analytical solu- tions show excellent agreement with the numerical results. For typical composite box beams used in practice, shear slip in partial composite box beams makes a significant contribution to beam deformation. Even for full composite box beams, slip effects may result in stiffness reduction. However, slip effects are ignored in many design specifications which use *Corresponding author e-mail: pengzhenlu@zjut.edu.cn The writers gratefully acknowledge financial support provided by the Science Founda- tion of China Postdoctoral Grants (No. 20110490183), the Science Foundation of the Ministry of Housing and Urban–Rural Development of the People’s Republic of China (Grant No. 2012-K2-6), the Education Department Science Foundation of Zhejiang Province (Grant No. Y201122051),