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Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall Pier |
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| Authors: | HE Bo SHI Ya-nan ZHU Hong-ping GUO Wen-zeng CHEN Yong |
| Institution: | 1. Wuhan Tianxingzhou Highway and Bridge Investment Development Co. , Ltd, Wuhan 430074, China;School of Civil Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Hubei Key Lab of Control Structures, Huazhong University of Science and Technology,Wuhan 430074,China 2. Department of Architecture and Civil Engineering, University of Bath, Bath BA27AY, UK 3. School of Civil Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Hubei Key Lab of Control Structures, Huazhong University of Science and Technology, Wuhan 430074, China 4. Wuhan Tianxingzhou Highway and Bridge Investment Development Co. , Ltd, Wuhan 430074, China |
| Abstract: | During cantilever cast in construction of high-pier and large-span continuous rigid frame bridges, structural stability in the longest cantilevered stage is very important. Based on a practical design case of a large-span continuous rigid frame bridge in Wuhan, the longest span stability coefficient is calculated with linear-buckling and nonlinear-buckling methods, respectively. The influences of both geometrical nonlinearity and the dual nonlinearity of material and geometry are considered. Numerical results indicate that the nonlinear solution is necessary to stability analysis because linear buckling loads axe much higher than those of nonlinear buckling. Thus, the edge fiber yield criterion is more convenient and faster than ultimate loading criterion when estimating nonlinear stability of structure, and can be used easily in the initial engineering design. |
| Keywords: | Continuous rigid frame bridge Stability Nonlinear buckling Edge fiber yield criterion |
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