Investigation on modelling approaches for prefabricated concrete beam-to-column connections using openSEE
Cao Xuyang1,2 Feng Decheng1,2 Wang Zhun1,2 Wu Gang1,2,3
1. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China;
2. Laboratory of Industrialized Structural and Bridge Engineering of Jiangsu Province, Southeast University, Nanjing 210096, China;
3. National Prestress Engineering Research Center, Southeast University, Nanjing 210096, China
Abstract：Prefabricated concrete frame structure is one of the most widely used prefabricated structural systems. The crucial part of this kind of structures is the beam-to-column connection, which not only affects the global seismic performance, but is also related to the overall feasibility and the economic efficiency in construction. According to the nonlinear characteristics of different kinds of prefabricated beam-to-column connections, numerical simulation methods based on OpenSEES software are systematically investigated, and two types of analysis models are developed for wet connection and dry connection, respectively, with the influences of some local features, such as the key groove length, pre-stressing and dampers, considered in the models. To validate the developed numerical models, 10 prefabricated beam-to-column connections under cyclic loading were simulated and the values for the parameters of each model were given. The calculation results indicate that the models can represent not only the macro-behaviors of the connections (e.g., the peak bearing capacity, the strength and stiffness degradation), but can also predict the stress states and micro-responses of local materials. The work canprovide references for future modeling analysis of prefabricated concrete structure.
