Inspection, Evaluation and Repair of Steel Structures Part 6 pptx

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Ngày tải lên: 11/08/2014, 09:20

... displacement t EM 1110-2 -60 54 1 Dec 01 6- 1 Chapter 6 Structural Evaluation 6- 1. Purpose of Evaluation a. Structural evaluation is the process of determining the capability of a structure ... 1989). 6- 2. Fracture Behavior of Steel Materials a. The operating service temperature of a steel structure has a significant effect on the fracture behav...

Ngày tải lên: 05/08/2014, 11:20

... 6- 8 6- 17 Evaluation of Corrosion Damage 6- 9 6- 19 Evaluation of Plastically Deformed Members 6- 10 6- 20 Development of Inspection Schedules 6- 11 6- 20 Recommended Solutions for Distressed Structures ... 6- 3 6- 1 Linear-Elastic Fracture Mechanics 6- 4 6- 7 Elastic-Plastic Fracture Assessment 6- 5 6- 7 Fatigue Analysis 6- 6 6- 13 Fatigue Crack-Propagation...

Ngày tải lên: 05/08/2014, 11:20

... number of load cycles that causes cracking of a component. The most important factors governing the fatigue life of structures are the severity of the stress concentration and the stress range of ... toughness of steel is generally a function of chemical composition, thermomechanical history, and microstructure. Chemical composition affects the toughness of a steel...

Ngày tải lên: 05/08/2014, 11:20

... structural evaluation is included and the severity of the condition can be quantitatively compared with previous and future observations. c. Evaluation. Evaluation of the effects of existing ... 2 -6. Operation and Maintenance Proper operation and maintenance of hydraulic steel structures are necessary to prevent structural deterioration. The following items...

Ngày tải lên: 05/08/2014, 11:20

... contact surfaces of the structure and seal, galvanic corrosion if the seal plate is of a dissimilar metal to that of the structure itself, or erosion corrosion if abrasive sand and silt particles are ... A588/A588M steel (a low-carbon weathering steel containing copper) and would corrode when coupled with A588/A588M steel. There may also be a potential difference between ri...

Ngày tải lên: 05/08/2014, 11:20

... results of NDT. (c) NDT Level III: An NDT Level III individual shall be capable of establishing techniques and procedures; interpreting codes, standards, and procedures; and designating the particular ... inspected structures, date and time of inspection, type of inspection, inspection procedure, inspection equipment, inspector identity and qualifications, and a...

Ngày tải lên: 05/08/2014, 11:20

... of σ and a. Stress-intensity factors for various types of geometries can be calculated using the information included in Figures 6- 8 through 6- 16 (Barsom and Rolfe 1987). Barsom and Rolfe and ... life EM 1110-2 -60 54 1 Dec 01 6- 6 Figure 6- 6. Interaction of noncoplanar discontinuities (Extracts from British Standards Institution 1980. Complete copies of th...

Ngày tải lên: 05/08/2014, 11:20

... src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAkIAAAGfCAIAAAA8jSo7AAAACXBIWXMAABYlAAAWJQFJUiTwAAAgAElEQVR42u3dWZajurIAUKhV8zIemWFkNiPjfeiWno5ojDvavT9qZTmdaScGhSLUUBQAsFtlURRd1zkQAOwvhpXlH0cBgP0SxgAQxgBAGAMAYQwAYQwAhDEAEMYAQBgDQBgDAGEMAIQxAIQxABDGAEAYAwBhDABhDACEMQAQxgBAGANAGAMAYQwAhDEAhDEAEMYAYBl/HQLgVNq2vVwuE999PB5FUVRVFb7YjsfjUVXV2Lfi247/xsfDf3/9d1VVdb/flz8sZVEUXdc5s+ETTdPcbreJRrNpmqIo...

Ngày tải lên: 05/08/2014, 11:20

... approximately 62 .6 Mpa- m (57 ksi- .in ) at -31 .6 °C (-25 °F). Conservatively, an estimate of K Ic of 55 MPa- m (50 ksi- .in ) is selected for use in the analysis. EM 1110-2 -60 54 1 Dec 01 ... structural integrity of the spillway gate must be evaluated. (a) Since an evaluation of the local buckling of the strut arms was conducted when it was first observed and t...

Ngày tải lên: 05/08/2014, 11:20