Flexural analysis of composite girder with corrugated steel webs considering shear deformation

4^th International Conference on Advanced Steel Structures

November 09-10, 2017 Singapore

Jun He, Yuqing Liu, Chuanxi Li and Hongli Li

Changsha University of Science & Technology, China
Tongji University, China

Posters & Accepted Abstracts: J Steel Struct Constr

Abstract :

The composite girder with corrugated steel webs (CGCSW) has excellent properties, such as light-weight, efficiency of introducing pre-stress forces, good seismic performance, which has greatly promoted applications in bridge engineering. The classical Euler-Bernoulli beam theory was found not to be applicable due to large shear deformation of corrugated steel web, an elastic bending model considering shear deformation is presented to analyze static and dynamic characteristics of a simply supported CGCSW. Based on displacement field assumption, equilibrium equations of internal force, deformation compatibility condition, static differential equation is derived and solved by boundary and load conditions. In order to obtain flexural vibration frequency, the dynamic governing differential equations are established based on energy variation method and Hamilton principle, then solved by the separation of variables in to generalized displacement functions. The analytic static behavior (deflection and flexural strains) and dynamic behavior (vibration frequencies) are verified through model test and finite element analysis. Shear deformation has great influence on both vertical deflection and flexural vibration frequency. A limit value of height-to-span ratio (1/30) is suggested for deflection calculation with/without considering shear deformation of corrugated steel web. And simplified calculation formulas for mid-span deflection and flexural vibration frequency with consideration of shear deformation are proposed to guide pertinent design.