The Grand Rapids Community College (GRCC) Bostwick Parking Structure, constructed in 1972, consists of five supported levels and one slab-on-ground parking level. An addition was constructed in 1980 for a total parking area of 1860 spaces. The structures consist of cast-in-place post-tensioned one-way concrete slabs and beams supported on concrete columns. A complete visual examination of all floor surfaces, structural elements, and their supports was performed. A chain drag and other testing was performed to detect and determine the extent of delaminations and corrosion. The garage was in poor condition due to deteriorated and leaking expansion joints, floor spalls, delaminations, and corrosion of the post-tensioning system. Increased deterioration and structural capacity was a concern, as the garage did not meet current code standards. The college desired a long-term repair with low maintenance. A full economic life-cycle analysis was completed to compare the initial versus long-term maintenance costs.
展开▼
