Abstract
One design alternative of earthquake resistant building is Partial Capacity Design (PCD) method. Unlike the commonly used capacity design method, PCD allows a safe failure mechanism which is called partial sidesway mechanism. In this mechanism, all beams and some columns are allowed to experience plastic damages while some selected columns are designed to remain elastic (called elastic columns). A new approach to predict the required strengths needed to design each structural member, called modified-PCD (M-PCD) is proposed. In this research six- and ten-story reinforced concrete buildings were designed using M-PCD, and their seismic performances are investigated. The base shear force resisted by the elastic columns was set to approximately 70% of the total base shear. Both nonlinear static procedure (NSP) and nonlinear dynamic procedure (NDP) are used to analyze the structures. The results show that the expected partial side sway mechanism is observed, and the drifts of the buildings are acceptable.
Highlights
In the design of earthquake resistant structures, one alternative of the capacity design method [1] is partial capacity design (PCD) method
PCD method proposed that elastic columns could be designed by using a single magnification factor which scales up their internal forces from a design earthquake
The drifts are plotted against limitation according to FEMA 273 [7], which are 2% for design earthquake (EDRS) and and 4% for maximum considered (MCER) earthquake
Summary
In the design of earthquake resistant structures, one alternative of the capacity design method [1] is partial capacity design (PCD) method. The second structural model was modified from the first one by reducing stiffness of members that may develop plastic hinges, and subjected to a target earthquake (R=1.6).
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