DEVELOPMENT OF A SEISMIC DISSIPATING MECHANISM FOR PRECAST CONCRETE CLADDING PANELS
Open Access
- Author:
- Maneetes, Hathairat
- Graduate Program:
- Architectural Engineering
- Degree:
- Doctor of Philosophy
- Document Type:
- Dissertation
- Date of Defense:
- January 24, 2007
- Committee Members:
- Ali M Memari, Committee Chair/Co-Chair
Linda Morley Hanagan, Committee Member
M Kevin Parfitt, Committee Member
Clifford Jesse Lissenden Iii, Committee Member - Keywords:
- Cladding panel
energy dissipation
seismic - Abstract:
- Modern earthquake-resistant design aims to isolate architectural precast concrete panels from the structural system so as to reduce the interaction with the supporting structure and hence minimize damage. The present study seeks to maximize the cladding-structure interaction by developing an energy dissipating cladding system (EDCS) that is capable of functioning both as a structural brace, as well as a source of energy dissipation. The EDCS is designed to provide added stiffness and damping to buildings with steel moment resisting frames with the goal of favorably modifying the building response to earthquake-induced forces without demanding any inelastic action and ductility from the basic lateral force resisting system. Because many modern building facades typically have continuous and large openings on top of the precast cladding panels at each floor level for window system, the present study focuses on spandrel type precast concrete cladding panel. The research work was divided broadly into four main phases: literature study; preliminary study; component level study; and building level study. The preliminary design of the EDCS was based on existing guidelines and research data on architectural precast concrete cladding and supplemental energy dissipation devices. In the component-level study, the preliminary design was validated and further refined based on the results of nonlinear finite element analyses. The stiffness and strength characteristics of the EDCS were established from a series of nonlinear finite element analyses. Using elastic theory, simple expressions were derived to approximate the lateral stiffness of the EDCS. In addition, a simple mathematical model of the EDCS was developed to facilitate the preliminary design of buildings incorporating EDCS. From the results of the nonlinear time history analyses performed on a 9-story and a 20-story moment frames, the EDCS was found to be effective in reducing interstory drift and member forces through the combined action of added stiffness and energy dissipation.