| In the field of steelwork, beam-column extended end-plate connection is one of the most popular forms of joints. As the complexity of its load-bearing, the multiplicity of influencing factors and a lack of corresponding regulations providing a proper design procedure in demesitc codes, it is prevalent work to learn its load-carrying properties systematically as well as to present a reasonable design method.Aimed at investigating the load-bearing properties of this kind of joints, 31 three-dimensional finite element models are established via the method of numerical simulation, considering factors such as end-plate, bolts, end-plate stiffeners and constructional details. Based on the analysis of load-bearing properties and the calculation results, connection behaviors including bearing-capacity, moment-rotation curves and failure modes are discussed in detail, as well as the influences coursed by factors mentioned above. Three kinds of end-plate are defined according to different failure modes. Ensuing analysis indicates that the definition provides important reference value for the research of bearing performance and majorizing design method of extended end-plate connections.High-strength bolts are momentous parts of the entire joints, of which the bearing states are crucial for the design work of connections. This paper makes a judgement of the bolt mechanical behavior, offers a suggestion on the item of bolts that should be checked in the design procedure, and presents an allsided allocation of bolt tension due to manifold models.The existence of prying action will always bring an early damage to a joint. There's no design method taking account of prying action in corresponding codes. Based on the analysis and research of the distribution and scale of prying action and with a view to get a majorizing design method, a mechanical model is established and formulas are deduced. Combining with the results form the finite element calculation, this paper presents a design method for extended end-plate connections, which takes into account prying action.End-plate stiffeners can intensify the strength and stiffness of joints. In this paper, design formulas and proposals on the end-plate stiffeners were put forward, with a comprehensive reference about strength and stiffness of stiffeners and the balance of tensile forces in bolts both inside and outside of the beam flanges. Meanwhile, it is considered that the usual dereferencing of thickness cannot meet the requirement of CECS102:2002. |
PDF Full Text Request