SEISMIC BEHAVIOR OF SEMI PRECAST CONCRETE SHEAR WALLS
Successful seismic performance of well designed and constructed precast concrete members is crucial for sustainable, economical and high speed construction. The main disadvantage of precast concrete is the difficulty of detailing the connection region between the vertical and horizontal load bearing elements to ensure structural integrity. Double wall system, being a semi precast approach, consists of two precast reinforced concrete layers encasing a cast in place concrete layer which is usually employed to create a monolithic connection between the wall and the slab. Seismic performance tests on double walls is scarce due to its limited use in earthquake prone regions. To gain a better understanding of the seismic behavior of double walls, four full scaled specimens with different section shapes were tested subjected to cyclic horizontal loads at Middle East Technical University. In this paper, test results are presented along with the comparisons with simple analytical models and performance limits presented in ASCE/SEI 41, Eurocode 8, and Turkish Earthquake Code 2007. It has been found that while TEC2007 provided estimations with the highest standard deviation, ASCE/SEI 41 06 demonstrated a better agreement with the tests results.