TY - JOUR
T1 - A coupled connector element for nonlinear static pushover analysis of precast concrete diaphragms
AU - Wan, Ge
AU - Zhang, Dichuan
AU - Fleischman, Robert B.
AU - Naito, Clay J.
N1 - Funding Information: This research was supported by the Precast/Prestressed Concrete Institute (PCI), the Charles Pankow Foundation, and the National Science Foundation (NSF) under Grant CMS-0324522 and SGER Supplement CMMI-0623952. The authors are grateful for this support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Publisher Copyright: © 2014 Elsevier Ltd.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - This paper describes the formulation of a diaphragm connector element developed for use in two-dimensional finite element (2D-FE) modeling of precast concrete diaphragms. The connector elements, composed of assemblages of standard element types readily available in most FE software package libraries, are nonlinear, coupled for shear-tension interaction, enable friction mechanisms, and possess descending branch behavior. Element construction is based on data from full-scale tests of common precast diaphragm connectors. The 2D-FE models have been employed in nonlinear static "pushover" analysis of isolated floor diaphragms to determine diaphragm stiffness, strength, deformation capacity, and limit state sequence. The use of discrete elements to model the precast diaphragm connectors permits the direct evaluation of local force and deformation demands acting on these details. Further, the coupled formulation is adaptable to complex force histories and deformation patterns in the floor diaphragm, thereby permitting the element to respond in realistic fashion. The models, verified for accuracy using large scale testing, are providing crucial information on capacity and limit states for calibrating performance-based design factors for a new seismic design methodology for precast concrete diaphragms.
AB - This paper describes the formulation of a diaphragm connector element developed for use in two-dimensional finite element (2D-FE) modeling of precast concrete diaphragms. The connector elements, composed of assemblages of standard element types readily available in most FE software package libraries, are nonlinear, coupled for shear-tension interaction, enable friction mechanisms, and possess descending branch behavior. Element construction is based on data from full-scale tests of common precast diaphragm connectors. The 2D-FE models have been employed in nonlinear static "pushover" analysis of isolated floor diaphragms to determine diaphragm stiffness, strength, deformation capacity, and limit state sequence. The use of discrete elements to model the precast diaphragm connectors permits the direct evaluation of local force and deformation demands acting on these details. Further, the coupled formulation is adaptable to complex force histories and deformation patterns in the floor diaphragm, thereby permitting the element to respond in realistic fashion. The models, verified for accuracy using large scale testing, are providing crucial information on capacity and limit states for calibrating performance-based design factors for a new seismic design methodology for precast concrete diaphragms.
KW - Finite elements
KW - Floor diaphragms
KW - Nonlinear analysis
KW - Precast concrete
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U2 - 10.1016/j.engstruct.2014.12.029
DO - 10.1016/j.engstruct.2014.12.029
M3 - Article
SN - 0141-0296
VL - 86
SP - 58
EP - 71
JO - Engineering Structures
JF - Engineering Structures
ER -