Strength Evaluation of Existing Concrete Buildings

Strength Evaluation of Existing Concrete Buildings
ACI 437R-03
The strength of existing concrete buildings and structures can be evaluated
analytically or in conjunction with a load test. The recommendations in
this report indicate when such an evaluation may be needed, establish
criteria for selecting the evaluation method, and indicate the data and
background information necessary for an evaluation. Methods of determining
material properties used in the analytical and load tests investigation are
described in detail. Analytical investigations should follow the principles of
strength design outlined in ACI 318. Working stress analysis can supplement
the analytical investigations by relating the actual state of stress in structural
components to the observed conditions. Procedures for conducting
static load tests and criteria indicated for deflection under load and
recovery are recommended.
Keywords: cracking; deflection; deformation; deterioration; gravity load;
load; load test; reinforced concrete; strength; strength evaluation; test.

CONTENTS
Chapter 1—Introduction, p. 437R-2
1.1—Scope
1.2—Applications
1.3—Exceptions
1.4—Categories of evaluation
1.5—Procedure for a structural evaluation
1.6—Commentary
1.7—Organization of the report
Chapter 2—Preliminary investigation, p. 437R-3
2.1—Review of existing information
2.2—Condition survey of the building
Chapter 3—Methods for material evaluation,
p. 437R-9
3.1—Concrete
3.2—Reinforcing steel
Chapter 4—Assessment of loading conditions and
selection of evaluation method, p. 437R-14
4.1—Assessment of loading and environmental conditions
4.2—Selecting the proper method of evaluation
Reported by ACI Committee 437

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