Repairs to Paulina Street Parking Structure

摘要

The Paulina Street Parking Structure is a 38-year-old concrete facility comprised of post-tensioned one-way slabs and beams and conventionally reinforced columns. Typical slabs are continuous over six spans, while beams are continuous over two or three spans. The post-ten-sioning system consists of unbonded, monostrand tendons in heat-sealed sheathing. Post-tensioned members also contain bonded, conventional reinforcement at locations of maximum flexural stress. The garage was constructed in 1976 using 5000 psi (34.5 MPa) lightweight concrete and 3/4 in. (19 mm) concrete cover was specified over conventional uncoated slab top reinforcing. In plan, the structure is approximately 270 × 263 ft (82 × 80 m) and consists of five similar east-west bays. Five elevated levels and one slab-on-ground provide a total floor area of approximately 408,000 ft~2 (37,900 m~2). An expansion joint is located between the three northern and two southern bays. Another expansion joint, centered on the structure (in a north-south orientation), divides each of the five east-west bays.