Inspection, Evaluation and Repair of Steel Structures Part 2 pps

... the operation of the existing structure, and overstress conditions may EM 1110 -2- 6054 1 Dec 01 2- 8 Table 2- 1 (Continued) (Sheet 2 of 4) EM 1110 -2- 6054 1 Dec 01 2- 16 f. Proper ... establish allowable size and number of discontinuities for base metal used to fabricate hydraulic steel structures. In addition, EM 1110 -2- 2703 also recommends that t...

Ngày tải lên: 11/08/2014, 09:20

... Descriptions and illustrations of various welded details and their fatigue categories are given in Table 2- 1 and Figure 2- 1 (AASHTO 1996). Figure 2- 1. Current AASHTO S r -N curves EM 1110 -2- 6054 ... hydroxide often forms. Deposits of film-forming materials such as oil and grease and sand and silt can also contribute to corrosion by creating crevices and io...

Ngày tải lên: 05/08/2014, 11:20

... src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAvkAAATaCAIAAABHNu6NAAAACXBIWXMAABYlAAAWJQFJUiTwAAAgAElEQVR42u3dfaxkZWH48ec012DcKiJeJHW1u8US3PCyTdEaVjszBWkatFBeQsXGxKZYW42mtk0a+8ecwaSNSWsjJtqmSf/AIhQDRMoWtl32ngEuSiqlhS19C+xCl/ByacSVNWzYZn5/PN3nd5y5e3fuvXPnzjzz+fxBLrP3ZebcuXO+85znPKfo9XqBjXHaaae9/PLLY/txF1100eLios0OAHVzNsHGefnllw8cODC2H7dlyxbbHAD6FMZ1NsixY8de97rX2bwAsLl+zCbYIIcOHXrzm99sOwCA...

Ngày tải lên: 05/08/2014, 11:20

... crystals of silver bromide (emulsion). RT inspection shall conform to ASTM E94, ASTM E1 42, ASTM E747, and ASTM E10 32. Other applicable documents include ASTM E2 42, ASTM E1316, ASTM E999, ASTM E1 025 , ... radiation beam, and accessibility to both sides of the parts to be inspected is required. EM 1110 -2- 6054 1 Dec 01 4-4 Figure 4 -2. Corrosion of rivet heads...

Ngày tải lên: 11/08/2014, 09:20

... Chapter 2 Causes of Structural Deterioration Corrosion 2- 1 2- 1 Fracture 2- 2 2- 3 Fatigue 2- 3 2- 5 Design Deficiencies 2- 4 2- 14 Fabrication Discontinuities 2- 5 2- 15 Operation and Maintenance 2- 6 ... 1110 -2- 6054 U.S. Army Corps of Engineers CECW-ED Washington, DC 20 314-1000 Manual No. 1110 -2- 6054 1 December 20 01 Engineering and Desig...

Ngày tải lên: 05/08/2014, 11:20

... establish allowable size and number of discontinuities for base metal used to fabricate hydraulic steel structures. In addition, EM 1110 -2- 2703 also recommends that the steel structures be welded ... 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

... 8.8 4.4 3.3 1.5 0.79 0 .28 179 (26 ) 14 6.9 3.5 2. 6 1 .2 0. 62 0 .22 193 (28 ) 12 5.6 2. 8 2. 1 0.9 0.50 0.18 (a) The ... 35.0 27 .0 12. 0 6.4 2. 2 97 (14) 92 44.0 22 .0 17.0 7.5 4.0 1.4 110 (16) 62 30.0 15.0 11.0 5.0 2. 7...

Ngày tải lên: 05/08/2014, 11:20

... crystals of silver bromide (emulsion). RT inspection shall conform to ASTM E94, ASTM E1 42, ASTM E747, and ASTM E10 32. Other applicable documents include ASTM E2 42, ASTM E1316, ASTM E999, ASTM E1 025 , ... 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;...

Ngày tải lên: 05/08/2014, 11:20

... evaluation, performance criteria and analytical tools are needed. Loading and performance criteria for hydraulic steel structures are outlined in EM 1110 -2- 2105, EM 1110 -2- 27 01, EM 1110 -2- 27 02, ... 1110 -2- 2105, EM 1110 -2- 27 01, EM 1110 -2- 27 02, and EM 1110 -2- 2703. Basic fatigue and fracture analysis concepts are presented in this chapter and in Chapter 2,...

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 ... stress (σ p and σ s ) can be linearized and resolved into σ m and σ b as shown in Figure 6-17. 6-5. Elastic-Plastic Fracture Assessment Rearranging Equation 2- 2, the up...

Ngày tải lên: 05/08/2014, 11:20