THE UPDATE PHILOSOPHY OF ASEISMIC DESIGN FOR CAST-IN-SITU RC BUILDING STRUCTURES

Based on the investigation of earthquake damages on building structures, through the studies of several projects elastic-plastic static and dynamic analyses and table vibration tests, referring to IBC2003&ATC40, for the most popular cast-in-situ RC building structures, this paper presents the update aseismic design philosophy to achieve this target-no damage while mild earthquake, little damage while moderate earthquake, no collapse while severe earthquake. The update philosophy is consisted of these new concepts: moderate or severe earthquake action for vertical members (columns and walls), mild earthquake action for horizontal members (secondary beams and spandrel beams) and the control standards for minimum ductility. Several projects practices revealed that, these new concepts and methods are coordinated to GB 50011-2001&JGJ3-2002 well and easy to operate. Especially for complicated tall building structures, they are able to provide the realizable platform to do further elastic-plastic static and dynamic analyses and evaluations.