New simplified approach to collapse analysis of stiffened plates |
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| Institution: | 1. College of Engineering, Ocean University of China, Qingdao 266100, China;2. School of Architecture and Civil Engineering, Weifang University of Science and Technology, Weifang, 262700, China;3. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;4. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai); Guangdong Key Laboratory of Oceanic Civil Engineering; Guangdong Research Center for Underground Space Exploitation Technology; School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China;5. Institute of Port, Coastal, and Offshore Engineering, Ocean College, Zhejiang University, China;6. Department of Geophysics, Kangwon National Univ., Chuncheon, Gangwon-do, Republic of Kore |
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| Abstract: | A new simplified model for collapse analysis of stiffened plates is developed in the framework of the idealized structural unit method (ISUM). By idealizing material and geometrical nonlinearities, larger structural units are defined as an element in ISUM than in conventional finite element analysis (FEA). The proposed stiffened plate model consists of ISUM plate elements and beam-column elements. The formulation of the plate element is performed by introducing accurate shape functions to simulate the buckling/plastic collapse behaviour of plate panels. Combining plate and beam-column elements allows for both local buckling of the plate panel and overall buckling of the stiffener.Fundamental collapse modes of plate panels and stiffened plates are investigated by conventional FEA. According to the observed characteristics, the new simplified model is formulated. Comparisons with FEA demonstrate the accuracy of the simplified model and its high applicability to typical stiffened plates in marine structures. |
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