Meeting at UC-San Diego13 January, 2001 Task 1.1.2: Shake Table Tests of a Multi- Story Apartment Building with Tuckunder Parking Khalid M. Mosalam Assistant Professor, University of California Berkeley Stephen A. Mahin, Co-PI Clay J. Naito, Post-doc. Erik Kunkel, Grad. student Suzanne Robinson, Grad. student Patrik Meyer, Undergrad. student

Building Design 1.Apartment building with tuckunder parking (open front in the ground story) and flat roof 2.Three-story structure 3.Upper two stories have 2 units with doors and windows on back wall and windows on front wall s structure designed according to UBC-64 5.Model dimensions: 32 x 16 x 27

Rehabilitation Reduce the risk of ground story collapse Design according to UBC-97 Vertical elements at open front: steel moment frames Enhancement of ground story back wall with holdowns at openings

System Testing Quasi-static: 1) First story with open front (initial stiffness) 2) First story with retrofitted front Dynamic: 1) First story with closed front (vibration) 2) First two stories with closed front (vibration) 3) First two stories with open front (vibration) 4) Three story with steel moment frame at front 5) Three story with open front 6) Three story with open front and finish materials 7) Finished three story with steel moment frame at front

Component Testing Two types of connections: 1) Vertical elements to header (SMF, OMF, shear wall) 2) Diaphragm to header (four conditions) a) Existing b) Minimal c) Moderate d) Conservative a) 2-10d TN (each side) b) Same as a) + A35 (every other block) c) Same as b) + 2-LS70 top d) same as b) + 4 6x12 2x12

Diaphragm to Header Setup

Diaphragm to Header Specimens

Preliminary Results