Lifetime-Oriented Structural Design Concepts- P20 ppt

... 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

... 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

... 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

... 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

... 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