causes, evaluation and repair of cracks in concrete structures

... inspected structures, date and time of inspection, type of inspection, inspection procedure, inspection equipment, inspector identity and qualifications, and a record of discontinuities detected that ... inspection, the type and extent of the deformation must be described accurately and in detail so that an assessment of the effect of the damage can be made. Th...

Ngày tải lên: 19/01/2014, 23:20

... Engineering and Design INSPECTION, EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES 1. Purpose. This manual describes the inspection, evaluation, and repair of hydraulic steel structures, ... describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of critical locations (such as fr...

Ngày tải lên: 19/01/2014, 23:20

... EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES 1. Purpose. This manual describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification ... engineer manual (EM) describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of crit...

Ngày tải lên: 27/06/2014, 05:20

... EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES 1. Purpose. This manual describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of ... Army Corps of Engineers CECW-ED Washington, DC 20314-1000 Manual No. 1110-2-6054 1 December 2001 Engineering and Design INSPECTION, EVALUAT...

Ngày tải lên: 27/06/2014, 14:20

... describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of critical locations (such as fracture critical members and various con- nections) ... due to hydrostatic loading are US Army Corps of Engineersđ ENGINEERING AND DESIGN Inspection, Evaluation, and Repair of Hydraulic Steel Structures...

Ngày tải lên: 27/06/2014, 17:20

... 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 ... 3- 2 Visual Inspection 3- 4 3- 13 Critical Area Checklist 3- 5 3- 13 Inspection Intervals 3- 6 3- 14 Chapter 4 Detailed Inspection Introducti...

Ngày tải lên: 27/06/2014, 17:20

... Purpose 1- 1 1- 1 Applicability 1- 2 1- 1 Distribution 1- 3 1- 1 References 1- 4 1- 1 Background 1- 5 1- 1 Mandatory Requirements 1- 6 1- 4 Chapter 2 Causes of Structural Deterioration Corrosion 2 -1 ... 20 314 -10 00 Manual No. 11 10-2-6054 1 December 20 01 Engineering and Design INSPECTION, EVALUATION AND REPAIR OF HYDRAULIC STEEL STRU...

Ngày tải lên: 05/08/2014, 11:20

... 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 i...

Ngày tải lên: 05/08/2014, 11:20

... paragraphs 3- 3 and 3- 5, respectively, to assist the inspector during the preinspection. (3) Review of previous inspection reports and operations records will aid in defining occurrence of unusual ... reduces the torsional stability of miter gates during opening and closing. EM 1110-2-6054 1 Dec 01 3- 1 Chapter 3 Periodic Inspection 3- 1. Purpose o...

Ngày tải lên: 05/08/2014, 11:20

... periodic inspection of hydraulic steel structures, if necessary. These methods, discussed in Chapter 4, include dye penetrant, magnetic particle, or eddy-current methods for inspection of cracks, and ... oxidation) and the normal waterline (wetting and drying promotes corrosion). EM 1110-2-60 54 1 Dec 01 3-13 3 -4. Visual Inspection a. Visual inspection i...

Ngày tải lên: 05/08/2014, 11:20

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

Ngày tải lên: 05/08/2014, 11:20

... 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 beha...

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 19 87) . 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 u...

Ngày tải lên: 05/08/2014, 11:20

... 201.2R). 1.3.4 Weathering-The weathering processes that can cause cracking include freezing and thawing, wetting and drying, and heating and cooling. Cracking of concrete due to natural weathering is usually ... in concrete cover will reduce settlement cracking. 1.3-Cracking of hardened concrete 1.3.1 Drying shrinkage-A common cause of cracking in concrete is rest...

Ngày tải lên: 24/10/2014, 17:37