Lifetime-Oriented Structural Design Concepts- P5 ppt

... 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

... 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

... the continuum and the structural level. This can be explained as follows. Using one element over the thickness practically means to work with a one-directior shell theory. We are then at the structural ... contrast to many earlier approaches we do not have to neglect the stress in thickness direction at the structural level. [773], [774] and [776] propose an implicit residual error esti...

Ngày tải lên: 01/07/2014, 10:43

... Improved numerical dissipation for the time integration algorithms in structural dynamics. Earthquake Engineer- ing and Structural Dynamics 5, 283–292 (1977) 369. Hillerborg, A., Mod´eer, M., ... for reliable finite element modelling and fault diagnosis of structural components used in nuclear plants. Nuclear Engineering and Design 223, 11–23 (2003) 754. Sinha, J.K., Friswell, M.I., Ed...

Ngày tải lên: 01/07/2014, 10:43

... needed. For practical design it is sufficient to apply equivalent static gust wind loads. 1.5 Fundamentals of Lifetime-Oriented Design 7 lifetimes. The progress in lifetime-oriented design concepts can ... international harmonization of warranty law. 1.5 Fundamentals of Lifetime-Oriented Design Authored by Friedhelm Stangenberg Current structural design concepts are oriented t...

Ngày tải lên: 01/07/2014, 11:20

... distributed loads single axle infrequent design situations 0,8 0,8 0,8 frequent design situations 0,75 0,4 0,75 quasi permanent design situations 0 0 0 bridge design. As mentioned above the load ... 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. structura...

Ngày tải lên: 01/07/2014, 11:20

... 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

... described phenomena under an undrained cyclic loading are not well understood by the design engineer a non-appropriate design of the foundation may be chosen. A more detailed discussion of the effect ... loading are maningfold. In a life time oriented design all relevant influences and boundary conditions a soil may be exposed to (depending in turn on the design solution) have to be kep...

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

... 772], implies, that the degradation of concrete caused by ASR is mainly induced by structural effects. These structural effects may result from hindered deformations due to geometrical constraints ... 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, 80...

Ngày tải lên: 01/07/2014, 11:20

Ngày tải lên: 01/07/2014, 11:20

... 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 structural optimization problems ... 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, con...

Ngày tải lên: 01/07/2014, 11:20

... changes in the damaged state. 4.6 Application of Lifetime-Oriented Analysis and Design 575 Fig. 4.120. FE model of the shaker test arrangement 4.6.2.3.1 Structural Analysis Using Time Integration Time ... long-term research in lifetime-oriented analysis and de- sign is the most essential achievement and the best possible evidence for work 4.6 Application of Lifetime-Oriented Analysi...

Ngày tải lên: 01/07/2014, 11:20

... in Figure 5.3. This design could be accepted. 5.1.2 Connection Plates of an Arched Steel Bridge Authored by Dietrich Hartmann and Andr´es Wellmann Jelic The lifetime-oriented design of an arched ... monte carlo procedure. Structural Safety 5(2), 119–126 (1988) 160. Bucher, C.G., Bourgund, U.: A fast and efficient response surface approach for structural reliability problems. Structur...

Ngày tải lên: 01/07/2014, 11:20