A yield line evaluation methodology for reinforced concrete structures
Yield line theory is an analytical technique that can be used to determine the ultimate bending capacity of flat reinforced concrete plates. Alternately, yield line theory, combined with rotation limits, can be used to determine the energy absorption capacity of plates subjected to impulsive and impact loadings. Typical components analyzed by yield line theory are basements, floor and roof slabs subjected to vertical loads, and walls subjected to out of plane loadings. Yield line theory equates plastic strain energy to external work for postulated collapse mechanisms. Multiple collapse mechanisms are evaluated and the mechanism with the minimum strain energy corresponds to the collapse load. Numerous investigators have verified yield line theory by experiment. Analysis by yield line theory is currently accepted by the ACI-318 Building Code Requirements for Reinforced Concrete and ACI-349 Code Requirements for Nuclear Safety Related Concrete Structures. One limitation of yield line theory is that it is computational difficult to evaluate some collapse mechanism. This problem is aggravated by the complex geometry nd reinforcing layouts commonly found in practice. The Yield Line Evaluator (YLE) is a computer program which was developed to solve computationally tedious yield line mechanisms. The program has the capability to either evaluate a single user-defined mechanism or to iterate over a range of mechanisms to determine the minimum ultimate capacity. The program is verified by comparison to a series of yield line mechanisms with known solutions.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 562857
- Report Number(s):
- WSRC-TR-94-334; ON: TI98001973
- Resource Relation:
- Other Information: PBD: [1997]
- Country of Publication:
- United States
- Language:
- English
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Yield Line Evaluation Methodology for Reinforced Concrete Structures
Ultimate capacity evaluation of reinforced concrete slabs using yield line analysis