Task 1.1.2: Shake Table Tests of a Multi-Story Apartment Building with Tuckunder Parking

1. Task 1.1.2: Shake Table Tests of a Multi-Story Apartment Building with Tuckunder Parking Khalid M. MosalamAssistant 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 Meeting at UC-San Diego

2. Building Design • Apartment building with tuckunder parking (open front in the ground story) and flat roof • Three-story structure • Upper two stories have 2 units with doors and windows on back wall and windows on front wall • 1960’s structure designed according to UBC-64 • Model dimensions: 32’ x 16’ x 27’

11. 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

14. 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

15. Component Testing • Two types of connections: • 1) Vertical elements to header (SMF, OMF, shear wall) • 2) Diaphragm to header (four conditions) 2x12 6x12 a) Existing b) Minimal d) Conservative c) Moderate 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) + 8d @ 4’’

16. Diaphragm to Header Setup

17. Diaphragm to Header Specimens

18. Preliminary Results