Title:
Importance of Structural Assessment before Rehabilitation Case Study: Waterfront Concrete Pier
Author(s):
Pericles C. Stivaros; Varoujan Hagopian; and Alan D. Pepin
Publication:
Symposium Paper
Volume:
337
Issue:
Appears on pages(s):
101-116
Keywords:
concrete repair, marine structures, waterfront structures, structural assessment, structural evaluation, responsibility
DOI:
10.14359/51724550
Date:
1/23/2020
Abstract:
This paper discusses the structural assessment and repair of a waterfront concrete pier. This paper also discusses the responsibilities of the construction team through the investigation and repair process. The apron around the pier is an exposed concrete deck supported on steel beams and concrete caissons. The concrete apron exhibited various deteriorated conditions, including cracking and spalling. The pier owner requested a structural condition survey of the pier apron to determine the extent of the damage and to develop a repair program.
The design team proposed an investigation and repair program in accordance with various industry standards, including ACI 357, ACI 562, and ACI 364.1R. The challenge of this project was the limited budget and time allocated by the owner to perform the investigation and repair. As a result, the investigation was limited to visual observations only, and the repairs were restricted to repairing unsafe conditions only. Despite the investigation and repair construction limitations, the design team work around the needs and budgets of the owner and managed to restore the structure to a safe condition. However, the effects of insufficient evaluation of the structure before rehabilitation, had an adverse effect on the project schedule and extent of repairs performed. Also, due to the project budget limitations, the responsibilities of the design team were challenged.
Related References:
1. Quality in the Construction Project, A Guide for Owners, Designers, and Constructors,” ASCE, Third Edition,2012, 302 pp.
2. ACI Committee 132 “Guide for Responsibility in Concrete Construction (ACI 132R-14),” American Concrete Institute, Farmington Hills, Michigan, 2014, 11 pp.
3. ACI Committee 562 “Code Requirements for Evaluation, Repair, and Rehabilitation of Existing Concrete Structures and Commentary (ACI 562-16)” American Concrete Institute, Farmington Hills, Michigan, 2016, 86 pp.
4. ACI Committee 357 “Guide for Design and Construction of Waterfront and Coastal Concrete Marine Structures (ACI 357.3R-14),” American Concrete Institute, Farmington Hills, Michigan, 2007, 46 pp.
5. ACI Committee 357 “Guide for Design and Construction of Offshore Concrete Structures (ACI 357R-84” American Concrete Institute, Farmington Hills, Michigan, 2013, 23 pp.
6. ACI Committee 364 “Guide for Evaluation of Concrete Structures before Rehabilitation (ACI 364.1R-07),” American Concrete Institute, Farmington Hills, Michigan, 2007, 18 pp.
7. Pericles C. Stivaros, forthcoming, “Responsibility in Evaluating and Repairing of Existing Concrete Structures: An Environmental Structure Case Study,” SP-XX, American Concrete Institute, Farmington Hills, Michigan, Forthcoming.
8. ACI Committee 201 “Guide for Conducting Visual Inspection of Concrete in Service (ACI 201.1R-08),” American Concrete Institute, Farmington Hills, Michigan, 2008, 15 pp.