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MODEL-BASED SIMULATION OF STEEL FRAMES WITH ENDPLATE CONNECTIONS

ZHOU, FENGFENG
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1119316578

Abstract Details

2005, PhD, University of Cincinnati, Engineering : Civil Engineering.
A three-dimensional finite element model is developed to simulate the behavior of eight-bolt stiffened endplate connections. The model may be set to include only the beam-side or both the beam- and column-side of a connection. The model also provides the option to choose between monotonic or cyclic loading. Incremental plasticity theory is adopted to model material nonlinear behavior. If the effective stress in an element exceeds the ultimate strength then that element is considered to have failed, and the strain energy in it is redistributed to the surrounding elements. Different approaches are used to simulate the bolt-pretension process. Contact algorithm is incorporated in this model to simulate the interaction between the beam-side and its support. A computer program associated with the finite element model is developed to generate the moment-rotation curves of the connections analyzed. A pre-processor is developed to generate the finite element mesh. In total, eleven specimens are analyzed. The results from these analyses are compared with corresponding experimental results and the comparison shows that the computer program can adequately predict the moment-rotation response of the connections. In order to implement connection properties in frame analysis, moment-rotation curves are fitted to three mathematical models to find the values of parameters characterizing these models. Based on the curve-fitting results, the three-parameter power model is chosen to represent the moment-rotation behavior of the connections. Then relations between these parameters and geometric variables of the connections are established through multiple regressions. To assess the validity of these formulae, moment-rotation curves generated by the power model are compared with those obtained from tests and analyses. The comparison shows good agreement between them. Finally, connections represented by the power model are incorporated in a frame analysis program. The results of frame analysis clearly demonstrate that the performance of a frame and the internal force distribution in the frame can be adjusted by modifying only the properties of its connections, and endplate connections can behave as rigid connections only if their properties satisfy certain stiffness requirement. A relationship between this requirement and the column to beam stiffness ratio is proposed to classify endplate connections.
Dr. Anant Kukreti (Advisor)
144 p.
Engineering, Civil
8-bolt stiffened endplate connection; finite element; moment-rotation behavior; frame analysis; 3-parameter power model; rigid versus semi-rigid connections

Recommended Citations

Citations

  • ZHOU, F. (2005). MODEL-BASED SIMULATION OF STEEL FRAMES WITH ENDPLATE CONNECTIONS [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1119316578

    APA Style (7th edition)

  • ZHOU, FENGFENG. MODEL-BASED SIMULATION OF STEEL FRAMES WITH ENDPLATE CONNECTIONS. 2005. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1119316578.

    MLA Style (8th edition)

  • ZHOU, FENGFENG. "MODEL-BASED SIMULATION OF STEEL FRAMES WITH ENDPLATE CONNECTIONS." Doctoral dissertation, University of Cincinnati, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1119316578

    Chicago Manual of Style (17th edition)

ucin1119316578
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© 2005, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.