Lifetime-Oriented Structural Design Concepts- P8 doc

... T. Bruhns · Dietrich Hartmann Rüdiger Höffer · Detlef Kuhl Günther Meschke (Eds.) Lifetime-Oriented Structural Design Concepts ABC XVI Contents 3.3.4.2.10 Finite ElementCalculations of the (Reduced)Static ... representing the fields of structural engineering, structural mechanics, soil mechanics, material sci- ence, and numerical mathematics introduced a research program on “lifetime...

Ngày tải lên: 01/07/2014, 10:43

... research Integrated design concepts Appropriate Quality Assurance for structural design, detailing and execution QA is a very important overhead necessity, also for lifetime-oriented design concepts, ... Fundamentals of Lifetime-Oriented Design 7 lifetimes. The progress in lifetime-oriented design concepts can contribute to an international harmonization of warranty law. 1.5...

Ngày tải lên: 01/07/2014, 10:43

... considered for realistic lifetime oriented design concepts especially with regard to the fatigue damage of structures and structural members. The basis of such design concepts is the realistic modelling ... Bridges Authored by Gerhard Hanswille For a realistic lifetime oriented design especially with regard to the fatigue damage of structures and structural members realistic models...

Ngày tải lên: 01/07/2014, 10:43

... numbers N T o of lorries during the design life assumed for λ 2 = 1.0. Therefore the factor differs for structures and structural members with different materials (e.g. structural steel, reinforcement, ... traffic category 2 in Table 3.14. Furthermore for the design life a reference value T so = 100 years was assumed. In case of another traffic category or design life the damage equivalen...

Ngày tải lên: 01/07/2014, 10:43

... the design as long as the train speed is sufficiently below the critical. If however the critical speed is lower than the maximal track speed, resonant amplification will provide the dominant design ... Pattern for Static and Dynamic Design Calculations The following expression summarizes the observed effects and may be applied to static and in particular to dynamic design calculations: q...

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... shallow foundations side by side) and different loadings arising from the superstructure design (despite design efforts to avoid this). 108 2 Damage-Oriented Actions and Environmental Impact Fig. ... yield strength undergo progressive, localized, and permanent structural changes, i.e. also in these materials fatigue takes place. The structural change thus can be described on the macrosc...

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... loading (Subsections 3.2.1.2 and (Subsections 3.2.2) and structural experiments of steel-concrete composite structures (Subsection 3.2.3). 3.2.1 Laboratory Testing of Structural Materials Authored by Otto T. ... envi- ronmentally induced degradation mechanisms, which led to a better under- standing of the microstructural mechanisms and to analysis tools to simulate the relevant processes....

Ngày tải lên: 01/07/2014, 10:43

... interval between the maximum amplitude of the burst and the last threshold crossing. • event: A microstructural displacement that produces elastic waves in ma- terial under load or stress, which are ... Therefore, the reliability of such structures depends among other influences also on the degree of structural degradation due to fatigue loading. In order to estimate the state of a structure...

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... earthquake loading (Section 3.4), which represents a typical loading scenario that may lead to structural failure induced by low cycle fatigue at highly stressed locations of the structures. 3.3.1.2.1.1 ... mesh dependency of the simulation results due to localisation. The equation for the Rankine damage potential for the tensile domain reads φ t,i (σ, ζ t )=ξ i (σ, ζ t ) −f ct ≤ 0 , (3.69)...

Ngày tải lên: 01/07/2014, 10:43

... eliminate these nodes at the structural level by a static condensation technique to achieve a better condition of the matrices and a better perfor- mance at the structural level [245]. The number ... is indicated by the ratio of the total number of system nodes/dof. The structural efficiency and the combined fieldwise and structural efficiency for a truss structure is Eff u struc = NN u p,1...

Ngày tải lên: 01/07/2014, 10:43

Ngày tải lên: 01/07/2014, 10:43

... inter- faces have been developed within the scope of reduction methods for large structural dynamic models and the design of single dynamical components of challenging structures. These methods ... and [107]). An interesting approach of an explicit-implicit multi time step method for nonlinear structural dynamics which prescribes the continuity of velocities at the interface and uses a...

Ngày tải lên: 01/07/2014, 10:43

... Pattern for Static and Dynamic Design Calculations The following expression summarizes the observed effects and may be applied to static and in particular to dynamic design calculations: q 1k (x, ... function of the component, although structural stability is still assured (e.g. in the case of airport taxiways). Internal damage is characterized by microstructural damage arising from micr...

Ngày tải lên: 01/07/2014, 11:20

... this sudden release of elastic energy due to micro-fracture events are of most interest to the structural engineer. These events are typically 10μm to 100μm in linear dimension. Sources of acoustic ... emission examination is a nondestructive testing method with demonstrated capabilities for monitoring structural integrity, detecting leaks and incipient failures in mechanical equipment. A...

Ngày tải lên: 01/07/2014, 11:20

... the design of a numerical length scale, cf. [596]. The extension to higher order elements is straightforward. Applying the interpolation conditions and con- sidering the most general case, ϕ is designed ... fixed crack concept, no convergence problems occur now even in the post-peak regime. The resulting structural response is given in Figure 4.83. Finally, a numerical analysis based on a...

Ngày tải lên: 01/07/2014, 11:20