PEC Reg no: CONSULT/1665
The DQA has the capability to design retrofit schemes for reinforced concrete and masonry buildings, bridge and steel roof trusses. Retrofitting is the technical intervention in a structure to improve its structural load carrying capacity. Various methods of retrofitting methods are used worldwide including; application of FRP, post tensioning, grout injection, concrete jacketing, concrete stitching and ferrocement overlay etc. CRITERIA FOR SELECTION OF RETROFITTING TECHNIQUE • Type of building and damages • Cost of intervention • Importance of the building • Availability of: •Adequate technology, •Materials, and •Skilled workmanship • Duration of work and problem of occupancy STANDARD STEPS OF RETROFITTING • Identification of damages and deficiencies • Damage assessment and performance analysis of existing building • Selection of technique and design of retrofitting scheme • Performance analysis of retrofitted building • Implementation
DQA provided consulting services to IMC Worldwide for the capacity evaluation of twenty different types of truss systems used as roofs in IMC schools built under the Humqadam- School Construction and Rehabilitation Program (SCRP). The project's scope was to model and analyze these trusses in a finite element analysis-based software, SAP2000/Etabs, and to check the adequacy of the truss elements by comparing their capacities to the demand specified in Pakistan's Building Code, as well as to provide appropriate retrofitting measures where necessary.
DQA assessed and strengthened various school designs prepared by IMC Worldwide for the Humqadam-School Construction and Rehabilitation Program (SCRP) in accordance with the Pakistan Building Code-Seismic Provision 2007. (BCP SP 2007). The school designs include single, double, and triple-story structures in seismic zones 2A, 2B, and 3 of the BCP-SP 2007. For design assessment and strengthening, detailed or simplified analysis approaches were used depending on the number of stories, structural irregularities, seismic zone, and structural typology of the school designs.
DQA performed structural health assessment (SHA) and retrofitting design for 90 school buildings. IMC Worldwide built the schools as part of the Humqadam-School Construction and Rehabilitation Program (SCRP). The SHA procedure included condition assessment details, structural health assessment using numerical finite element and analytical pushover analyses, thermal analysis, proposed retrofitting scheme addressing deficiencies in the existing design, and capacity analysis of the retrofitted building.
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