A method for the derivation of load effect envelopes based on statistical considerations
| Autor: | Eugene J. O'Brien, Robert E. Loov |
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| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | Canadian Journal of Civil Engineering. 20:201-209 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/l93-025 |
| Popis: | A simple method is proposed as a substitute for the usual process of factoring loads, performing a linear elastic analysis, and determining an envelope of the results. The method is based on statistical principles, but only a minimum knowledge of statistics is required for its use. It involves conventional structural analysis followed by some processing of the results which could readily be incorporated into existing computer programs.The practice of performing two-dimensional analyses on parts of three-dimensional structures is possible with the proposed approach. The implications are clarified and the necessary statistical parameters are derived.Deterministically derived design envelopes represent all the extremes of loading that can reasonably be considered. The envelopes found by the new method not only reflect loading variations but also consider their relative probabilities of occurrence so that excursions beyond the envelope are expected to be equally infrequent along the entire length of the structure. Inconsistencies inherent in the conventional approach are highlighted by comparison with the proposed method for a number of examples. Key words: probabilistic, safety, load, imposed load, load effect envelope, building. |
| Databáze: | OpenAIRE |
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