This code offers ideas for a initial assessment that determines the "design foundation code" that's, if the construction could be repaired in keeping with the ACI 318 model utilized in the unique layout, or if the fix must agree to the present ACI 318. The code presents ideas for picking power of in-situ fabric, appearing structural research, designing upkeep for energy and sturdiness, specifications for balance and shoring of development, and inspection and trying out of upkeep. remark offers software advice in addition to references for additional info.
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This code presents ideas for a initial evaluate that determines the "design foundation code" that's, if the development may be repaired according to the ACI 318 model utilized in the unique layout, or if the fix must conform to the present ACI 318. The code presents ideas for picking out energy of in-situ fabric, acting structural research, designing maintenance for energy and sturdiness, necessities for balance and shoring of development, and inspection and trying out of maintenance.
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Extra info for ACI 562M-13: Code Requirements for Evaluation, Repair, and Rehabilitation of Concrete Buildings and Commentary (Metric)
The strength and integrity of prestressed structures with damaged prestressing reinforcement requires careful consideration to assess the impact of the damage. Redistribution of moments may exceed the moment distribution permitted in ACI 318M-11. The actual state of the structure should be accurately modeled to determine the distribution of forces. 30 CODE REQUIREMENTS FOR EVALUATION, REPAIR, AND REHABILITATION OF CONCRETE BUILDINGS (ACI 562M-13) CODE COMMENTARY Redistribution of forces may be determined using material nonlinear analysis, by load tests described in ACI 437R, or by linear analysis, which bounds the limits of redistributed forces.
Slabs are less critical due to the relatively small initial precompression. Repairs of prestressed members may result in changing the class of the members from Class U to Class T or from Class T to Class C as defined in ACI 318M-11. This change is acceptable as long as durability and strength are addressed as part of the repair design. The impact of removing concrete from a post-tensioned structure is addressed in Scollard and Bartlett (2004). ICRI No. 4 provides guidance for removing concrete around anchorages and splices to prevent catastrophic loss of anchorage.
ACI 318-11 provides guidance for detailing of steel reinforcement. 2R provide detailing guidance for internal FRP reinforcement and externally bonded FRP reinforcement, respectively. 1 The effects of existing prestressing shall be included in the repair design. 2 The effects of modifications to existing structure geometry, existing damage conditions, prestressing force release, and construction sequence shall be included in the repair design. 1C Requirements for repair of structures with bonded and unbonded prestressing are different.