Inspection, Evaluation and Repair of Steel Structures Part 3 ppt

... 01 3- 15 Figure 3- 7. Critical areas for roller gates EM 1110-2-6054 1 Dec 01 3- 8 Figure 3- 4. Girder-rib-skin-plate connection EM 1110-2-6054 1 Dec 01 3- 13 3- 4. Visual ... stiffeners and diaphragm web-to-girder welds. (7) Previous cracks repaired by welding. Figure 3- 6 shows an example of cracks redeveloped at weld repairs. (8) Locations o...

Ngày tải lên: 11/08/2014, 09:20

... identifying critical areas and a checklist of locations (both specific and general) that are susceptible to fracture and corrosion are presented in paragraphs 3- 3 and 3- 5, respectively, to assist ... structural evaluation is included and the severity of the condition can be quantitatively compared with previous and future observations. c. Evaluation. Evaluation...

Ngày tải lên: 05/08/2014, 11:20

... units, da/dN = 3. 6 × 10 -10 (∆K I ) 3 where a = in. and ∆K I = ksi- .in ) (2) Martensitic steels. ASTM A514/A514M and ASTM A517/517M steels are martensitic steels: da/dN = 1 .35 × 10 -7 ... src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAkIAAAGfCAIAAAA8jSo7AAAACXBIWXMAABYlAAAWJQFJUiTwAAAgAElEQVR42u3dWZajurIAUKhV8zIemWFkNiPjfeiWno5ojDvavT9qZTmdaScGhSLUUBQAsFtlURRd1zkQAOw...

Ngày tải lên: 05/08/2014, 11:20

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

Ngày tải lên: 11/08/2014, 09:20

... Operation and Maintenance 2-6 2-15 Unforeseen Loading 2-7 2-16 Chapter 3 Periodic Inspection Purpose of Inspection 3- 1 3- 1 Inspection Procedures 3- 2 3- 1 Critical Members and Connections 3- 3 3- 2 ... Inspection 3- 4 3- 13 Critical Area Checklist 3- 5 3- 13 Inspection Intervals 3- 6 3- 14 Chapter 4 Detailed Inspection Introduction 4-1 4-1 Purpose of...

Ngày tải lên: 05/08/2014, 11:20

... toughness of steel is generally a function of chemical composition, thermomechanical history, and microstructure. Chemical composition affects the toughness of a steel, since the addition of solute ... especially true of welds on riveted structures, since the structural steels typically used in older structures are not characterized as steels for welding. A discussion of...

Ngày tải lên: 05/08/2014, 11:20

... 3- 6 a. Fatigue cracks initiating from ends of welded stiffeners b. Cracks initiating from previous repair welds Figure 3- 3. Fatigue cracks at end of stiffener and at weld repair ... according to paragraph 3- 3. A visual inspection is hands-on and requires careful and close examination. The inspector should look closely at the members and connections and...

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

... Behavior of Steel Materials a. The operating service temperature of a steel structure has a significant effect on the fracture behavior of the steel. For low- and intermediate-strength steels, ... Structural Evaluation 6-1. Purpose of Evaluation a. Structural evaluation is the process of determining the capability of a structure to perform its intended f...

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 ... the distance between the edge of component and edge of crack in the through-thickness direction Figure 6-4. Resolution of a discontinuity (after British Standards Insti...

Ngày tải lên: 05/08/2014, 11:20