Lifetime-Oriented Structural Design Concepts- P10 pot

... 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...

Ngày tải lên: 01/07/2014, 10:43

... 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...

Ngày tải lên: 01/07/2014, 10:43

... 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

... Materials It has been shown in Subsections 3.1.2.3, 3.1.2.3.2, 3.1.2.3.3, 3.1.2.2.2 that the main microstructural mechanisms of environamentally induced corrosion and deterioration processes are by now ... more or less heuristic evaluations of the degradation process and its influence on the residual structural safety. Recent progress in computational durability mechanics (see e.g. [75, 211,...

Ngày tải lên: 01/07/2014, 10:43

... aforemen- tioned design variables, optimization criterion and constraints: • design variables x i ,i=1, 2, 3, ,n representing the vital parameters of a structural system, concentrated in the design vector ... reported here. 4.5 Optimization and Design Authored by Dietrich Hartmann As demonstrated in Section 4.1.4 structural design problems can be trans- formed into equivalent s...

Ngày tải lên: 01/07/2014, 10:43

... ex- amples are shown in the following chapters ranging from the lifetime-oriented analysis and design of beam-like structures over structural components used in the automobile industry up to concrete ... reinforced side-frame design and additional torsion bars, which are packaged at several locations in the convertible structure. 4.6 Application of Lifetime-Oriented Analysis and De...

Ngày tải lên: 01/07/2014, 10:43

... 244 life-cycle design, 7 investigation, 499 lifetime 207 analysis of bridge hangers, 34 lock-in effect, 34 stochastic excitation force, 34 assessment, 610 control, 659 lifetime-oriented analysis, 562, 583 design, ... 143, 291, 293 dissipation potential 297 dissolution 152, 305 front, 356 process, 150, 152, 374 drilling core 618 driving force 373 Drucker-Prager plasticity model, 290 potenti...

Ngày tải lên: 01/07/2014, 10:43

... these numbers were only a small fraction of the mean number of cycles to failure according to the current design concept [685], taking into account a slope m=8. 3.2.3.2.2 Test Specimens The specimen used ... the shear studs not only at the end of their lifetime but within [593]. This indicates that the design concepts in the current codes [22, 23] does not describe sufficiently the real be-...

Ngày tải lên: 01/07/2014, 11:20

... 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, 11:20

... 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 ... popular model reduction method. The idea is to solve a subset of the 4.2 Numerical Methods 501 Structural Dynamics Modelling (FEM) Linear Components Nonlinear Components Model Reduction Subst...

Ngày tải lên: 01/07/2014, 11:20

... different strengths at the age of 28 days (solid lines) [193] 4.6 Application of Lifetime-Oriented Analysis and Design 631 E(f ck ) = 21500 ·  f ck +8 10  1 3 (4.432) f ct (f ck )=1.40 ·  f ck 10  2 3 (4.433) 4.6.5.1.5.3 ... distribution. ΔH(x, y, z) = ¯ Φ · ¯ Λ ¯ Λ = diag{λ 1 , , λ n } (4.436) 4.6 Application of Lifetime-Oriented Analysis and Design 641 Fig. 4.174. Cantilever bend...

Ngày tải lên: 01/07/2014, 11:20