20—strength evaluation of existing structures
strength evaluation of existing concrete buildings
... Bases for Design of Structures Assessment of Existing Structures STRENGTH EVALUATION OF EXISTING CONCRETE BUILDINGS RILEM—International Association for Building Materials and Structures RILEM ... Basis for Design of Structures Assessment of Existing Structures (ISO 13822)—This international standard provides general requirements and procedures for the assessment of existing structures, such ... types of tests CHAPTER 4—ASSESSMENT OF LOADING CONDITIONS AND SELECTION OF EVALUATION METHOD 4.1—Assessment of loading and environmental conditions A fundamental aspect of any strength evaluation...
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evaluation of existing nuclear safety-related concrete structures
... Concrete Structures 364.1R Guide for Evaluation of Concrete Structures Prior to Rehabilitation 437R Strength Evaluation of Existing Concrete Buildings 515.1R ASCE 11 349.3R-17 A Guide to the Use of ... consideration; further discussion of this topic is contained in Section 3.5.5 In spite of these limitations, NDE is often a valuable tool in the evaluation of existing structures In the event that ... measured results of material properties from a reduced quantity of test data A summary of this method, which may also be used to EVALUATION OF EXISTING NUCLEAR SAFETY-RELATED CONCRETE STRUCTURES reduce...
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guide for evaluation of concrete structures prior to rehabilitation
... Survey of Concrete in Service 228.1R In-Place Methods for Determination of Strength of Concrete EVALUATION OF STRUCTURES PRIOR TO REHABlLlTATlON 437R B-14 SP-85 Strength Evaluation of Existing ... condition of the material in the core 6.3-Testing and evaluation Evaluation of existing concrete should include determinations of strength and quality (NRMCA 1979, ACI 228.1R, and Shroff 1986 ... STRUCTURAL PERFORMACE UNIFORMITY OF CONCRETE 00 0 l 0 l 00 l l 364.1R-13 EVALUATION OF STRUCTURES PRIOR TO REHABILITATION Table 6.2 -Evaluation of properties of reinforcing steel PROPERTIES AND...
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Fiber Reinforced Polymer (FRP) for the Repair & Retrofit of Existing Structures & for New Construction
... the peaks of the roofs, and where positive moment reinforcing was required on the underside of the valleys of the roofs.(18) 20 | P a g e FRP for The Repair & Retrofit of Existing Structures ... (12) 15 | P a g e FRP for The Repair & Retrofit of Existing Structures & for New Construction 3.0 FRP for Retrofit, Rehabilitation, & Repair of Existing Structures FRP is a structural material which ... use of FRP materials 3|P a ge FRP for The Repair & Retrofit of Existing Structures & for New Construction Table of Contents Abstract 1.0 Introduction 1.1 Statement of Problem 1.2 Purpose of Thesis...
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practices for evaluation of concrete in existing massive structures for service conditions
... investigations and test data 6.2.4 Summary evaluation of concrete 6.2.4.1 Evaluation of portions of structures not requiring immediate repair 6.2.4.2 Evaluation of portions of structures requiring immediate ... Concrete 224.1R Causes, Evaluation, and Repair of Cracks in Concrete Structures 228.1R In-Place Methods for Determination of Strength of Concrete 437R Strength Evaluation of Existing Concrete Buildings ... evaluating concrete in existing massive structures 1.1-Scope This report focuses on practices used to evaluate concrete in existing massive structures Design considerations, evaluation of existing operating...
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Tài liệu Inspection, Evaluation and Repair of Steel Structures P2 ppt
... discontinuity can be seen as a shadow of different photographic density from that of the image of the surrounding material Evaluation of the radiograph is based on a comparison of these differences in photographic ... and location of inspected structures, date and time of inspection, type of inspection, inspection procedure, inspection equipment, inspector identity and qualifications, and a record of discontinuities ... Concentrated loads occur at support locations on all structures (i.e., trunnion assembly of gates and valves, end posts of lift gates, and end disks of roller gates), lifting connections, and areas...
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Tài liệu Inspection, Evaluation and Repair of Steel Structures P1 docx
... 6-8 Evaluation of Corrosion Damage 6-9 Evaluation of Plastically Deformed Members 6-10 Development of Inspection Schedules 6-11 Recommended Solutions for Distressed Structures ... 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 the cyclic loading The fatigue life of ... REPAIR OF HYDRAULIC STEEL STRUCTURES Purpose This manual describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of critical locations...
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Báo cáo khoa học: "Beyond Projectivity: Multilingual Evaluation of Constraints and Measures on Non-Projective Structures" doc
... maximum over gap degrees of all subtrees of a dependency tree (the gap degree of a subtree is the number of contiguous intervals in the gap of the subtree) The interval degree of an edge is bounded ... on levels of nodes We also propose a novel measure combining levels of nodes and the partitioning of gaps into components of the dependency tree (there may be nodes in the subtree of the component ... measure, level signatures of non-projective edges, combining levels of nodes with the partitioning of gaps of nonprojective edges into components We derive a formal property of these signatures that...
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Theory of Arched Structures: Strength, Stability, Vibration ppt
... types of deflections of deformable structures The structure may be subjected to different actions, such as variety of external loads, change of temperature, settlements of supports, and errors of ... the points of the structure displace, and relative position of separate points of a structure changes There are other reasons of the deformation of structures Among them is a settlement of supports, ... computation of deflections is an important part of analysis of any statically indeterminate structure Computation of deflections is also an integral part of a dynamical analysis of the structures...
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Inspection Evaluation And Repair Of Steel structures Part 1 docx
... 6-8 Evaluation of Corrosion Damage 6-9 Evaluation of Plastically Deformed Members 6-10 Development of Inspection Schedules 6-11 Recommended Solutions for Distressed Structures ... DEPARTMENT OF THE ARMY U.S Army Corps of Engineers Washington, DC 20314-1000 EM 1110-2-6054 December 2001 Engineering and Design INSPECTION, EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES ... REPAIR OF HYDRAULIC STEEL STRUCTURES Purpose This manual describes the inspection, evaluation, and repair of hydraulic steel structures, including preinspection identification of critical locations...
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Inspection Evaluation And Repair Of Steel structures Part 2 pot
... 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 the cyclic loading The fatigue life of ... fracture toughness (ability of the material to withstand a given stress-field intensity at the tip of a crack and to resist tensile crack extension) of a component when the state of stress at the crack ... be 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 structural steels...
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Inspection Evaluation And Repair Of Steel structures Part 3 potx
... number of stress range blocks ni = number of cycles corresponding to Sri Sri = magnitude of a stress range block f Repeated loading for hydraulic steel structures The general function of hydraulic ... chamber water level and to opening and closing of gates The number of load cycles is a function of the number of lockages that occurs at the lock The number of load cycles due to gate operation or filling/emptying ... such a position for any length of time, flow-induced vibration should be considered as a possible source of fatigue loading An example of the fatigue evaluation of a spillway gate including vibration...
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Inspection Evaluation And Repair Of Steel structures Part 4 docx
... failure of the paint system is an indication of underlying corrosion A widespread failure of the paint system may indicate general corrosion resulting in a slow, relatively uniform thinning of the ... localized failure of the paint system, localized corrosion may be occurring Paint failure where the edges of two or more surfaces contact, such as at the edge of a rivet head or at the edge of an angle ... Concentrated loads occur at support locations on all structures (i.e., trunnion assembly of gates and valves, end posts of lift gates, and end disks of roller gates), lifting connections, and areas...
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Inspection Evaluation And Repair Of Steel structures Part 5 pot
... discontinuity can be seen as a shadow of different photographic density from that of the image of the surrounding material Evaluation of the radiograph is based on a comparison of these differences in photographic ... and location of inspected structures, date and time of inspection, type of inspection, inspection procedure, inspection equipment, inspector identity and qualifications, and a record of discontinuities ... and determine the extent of corrosion Any failure of the paint system should also be identified (b) The extent of corrosion at crevice sites, particularly in riveted structures, should be recorded...
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Inspection Evaluation And Repair Of Steel structures Part 6 docx
... effect of bead configuration, and macrodefects of welded joints The quality of welds can be evaluated as a function of ductility to resist cracking during bending The top and bottom surfaces of a ... Selection of test method depends on hardness or strength of the material, the size of the welded joints, and the type of information desired The Brinell, which is appropriate for field evaluations, ... expansion of the fractured specimen and appearance of the fractured surfaces, can also be used to characterize the fracture toughness of the test material The amount of expansion on each side of each...
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Inspection Evaluation And Repair Of Steel structures Part 7 docx
... permission of PrenticeHall, Inc., Englewood Cliffs, NJ) where KT = theoretical stress concentration factor, aN = half of the long dimension of the ellipse, b = half of the short dimension of the ... by Figure 6-20 δcrit = critical CTOD (paragraph 5-8c) εy = yield strain of the material In determination of C, if the sum of primary and secondary stresses, excluding residual stress, is less than ... Determine material properties including yield strength σys, modulus of elasticity E, KIc (based on the level of applied stress and the value of βIc), Kc, or CTOD KIc may be estimated from Charpy V-Notch...
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Inspection Evaluation And Repair Of Steel structures Part 8 ppt
... life of the members (Pennsylvania Department of Transportation 1988) Figure 6-23 Development of maintenance schedule 6-12 Recommended Solutions for Distressed Structures a If a thorough evaluation ... proportions of the member For example, depending on the location of the corrosion, the shear strength of a flexural member may be more affected than the flexural strength Analysis of the complete ... that incorporates the out -of- straightness of a crooked member or a local reduction of cross-sectional properties to model a locally buckled flange In more significant cases of damage, a two- or three-dimensional...
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Inspection Evaluation And Repair Of Steel structures Part 9 pot
... pieces (3) Evaluation Because several detrimental conditions were detected during the inspection, the structural integrity of the spillway gate must be evaluated (a) Since an evaluation of the local ... significance of these new vibrations The results of the field study revealed that vibrations of approximately five cycles per second or Hertz (Hz) were producing cyclic stresses of up to 55.2 ... vibration Because of the history of problems at this site, a thorough visual inspection was made previously on several gates (2) Inspection An in-depth inspection was made of the gate with particular...
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Inspection Evaluation And Repair Of Steel structures Part 10 ppsx
... fatigue analysis of this example consists of three propagation steps (1) The first step is to analyze the crack propagation of a hemispheric surface crack having an initial radius of 1.6 mm (1/16 ... Used on Older Hydraulic Steel Structures Steel standards for the period when many hydraulic steel structures were constructed are of interest from both a structural evaluation and a repair and ... crack breaks through the surface on the other side of the plate (i.e., the radius of hemispheric crack becomes the same as the plate thickness of 9.5 mm (3/8 in.)), a through-thickness crack condition...
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Inspection Evaluation And Repair Of Steel structures Part 11 pot
... Description of condition Figure 8-2 shows a crack in a tension flange of a girder on a miter gate (the photograph shows the inside face of the flange) The crack extends from the termination of a weld ... discusses several repair examples The type of repair details selected will be determined considering the following factors: a Cause of damage If the cause of original damage is not accounted for, ... that the damage will reoccur If possible, the cause of damage should be eliminated or minimized b Remaining service life of the structure A repair of a structure that is intended to be in service...
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