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UNIFIED AUTOSTRESS METHOD.
| 题名： | UNIFIED AUTOSTRESS METHOD. |
| 作者： | Schilling-CG |
| 关键词： | HIGHWAY-BRIDGES; AUTOSTRESS-DESIGN; INELASTIC-ANALYSIS; OVERLOADS-; MAXIMUM-LOADS; FLANGES-; ITERATIONS- |
| 摘要： | A unified method of inelastic analysis that can be applied in both the American Association of State Highway and Transportation Officials overload and maximum load checks is presented in this paper. Different methods of analysis are presently used in these two checks in the AASHTO alternate load factor design procedures. The new method, called the unified Autostress method, can account for yielding at any number of negative- and positive-bending locations, such as pier and flange-transition locations. It can also be applied in an elastic analysis. The new method is founded on classical indeterminate theory and can be readily adapted for computer programming. In continuous spans, automoments are caused by yielding at various locations and remain after the loading is removed. These automoments are calculated by satisfying a continuity relationship at all pier locations and a rotation relationship at all yield locations. The continuity relationship depends on the stiffness properties along the entire length of the member, and the rotation relationship depends on the properties of the cross sections at the yield locations. An iteration procedure is required for more than two spans; one such procedure, which has been shown to work satisfactorily, is outlined. |
| 总页数： | Transportation Research Record. 1993. (1380) pp28-34 (6 Fig., 13 Ref.) |
| 报告类型： | 科技报告 |
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