The capacity of the structures to resist the extreme load would be decreased in its tens even hundreds of years long service period since the enviorment erosion, material aging, fatigue effect of the alternating load inevitably accumulate the damage and decrease the resistance.

Corrosion fatigue damage of concrete is the coupling action result of corrosion medium and load fatigue, and the study on this has been in the stage of theory search.

With the loading test equip- ment of corrosion fatigue specially designed, authors studied the influence of water binder ratio and dosage of fine mineral admixture on the flexural tensile strength of high performance concrete (HPC) withstanding the coupling action of third point fatigue loading and Na2SO4solution.

In this paper,a nonlinear fatigue damage model based on damage mechanics and genetic algorithms is used in the optimum fatigue reliability design of a simple offshore platform under stochastic wave load,The reliability of the fatigue damage model and the effectiveness of genetic algorithm which are used in this paper are shown by the results of optimum design.

The transmission tower foundation is different from normal building foundations because the transmission lines are of long distance,broad crossed areas,complex topography and geological conditions and great difference of the physical mechanical nature of the foundation soil.

Nonstationary flow past a cylinder with organized blowing out of jets in the bottom part with the aim of reducing an alternating load on the body is investigated numerically.

To analyse the influence of long term alternating load and of the biological bone, a pair of cadaver femora were tested with 100,000 cycles of 2,000 N alternating load after GN and DHS osteosynthesis.

Nine head and neck parts of sowbone femora with a A2 osteotomy 1,000 alternating load tests at 1,000 and 1,500 N were performed after GN I beam plate, gamma nail and PFN screw fixation.

Aditionally, three pairs of cadaver femora were tested with 6,000 cycles from 1,000-3,500 N of alternating load comparing GN vs gamma, GN vs PFN and gamma vs PFN to avoid influence of the biological variability on the ranking.

After 100,000 alternating load cycles no instability and a total deformation of 13.3 mm was found for the GN, but for the DHS instability occured after 15,800 cycles.

It is shown that, due to the nonlinearity of the transient process, under certain conditions, the efficiency of the energy contribution to the alternate load can almost be doubled as compared with the circuit containing a permanent load.

The redundancy of the rib system in these structures leads to alternate load paths that make it difficult to detect such defects.

The tool is useful for parallelizing sequential applications with parallel loops, or as an alternate load balancing routine for existing parallel applications.

An alternate load path, up the cooler steel of the level above and into the concrete core is possible but unproved.

All of these characteristics combined to both absorb the energy of the debris impacts and provide alternate load paths around the damaged areas.

CL propagation in polystyrene, a model material, is studied under remotely applied, fixed load fatigue (Case I) and under fixed displacement (Case II).

Static tensile deformation from 90% to 95% of the yield point produced an increase in the low-load fatigue life.

Random-load fatigue tests on a fail-safe structural model

Axial load fatigue tests on unnotched sheet specimens of 24S-T3, 75S-T6 aluminium alloys and of SAE 4130 steel.

Rotational load fatigue testing of dental structures is a niche area in dental research.

This paper describes the experiments on three reinforced concrete portal frames under variable repeated loading. The results obtained are almost consistent with the theoretical shakedown values. Thus it can be concluded that the shakedown theorem is also applicable to reinforced concrete structures.This paper points out that with the equal magnitude of loading the variable repeated loading is more disadvantageous than a simply applied load to a structure. In the design of a structure there is a region where...

This paper describes the experiments on three reinforced concrete portal frames under variable repeated loading. The results obtained are almost consistent with the theoretical shakedown values. Thus it can be concluded that the shakedown theorem is also applicable to reinforced concrete structures.This paper points out that with the equal magnitude of loading the variable repeated loading is more disadvantageous than a simply applied load to a structure. In the design of a structure there is a region where the structure may be safe under simply applied load but doesn't shakedown for variable repeated loading. So it is necessary to give a new meaning to the safety of a structure loaded by a variable repeated loading.

Three reinforced concrete continuous beams and three portal frames have been tested under variable repeated loading. The theoretical shakedown values obtained by analyzing the continuous beams and the portal frames are almost consistant with the experimental results. It can be verified preliminarily that the shakedown theorem is also applicable to reinforced concrete structures.Shakedown analysis and experiments revealed that with equal magnitude of loading, the variable repeated loading is more disadvantageous...

Three reinforced concrete continuous beams and three portal frames have been tested under variable repeated loading. The theoretical shakedown values obtained by analyzing the continuous beams and the portal frames are almost consistant with the experimental results. It can be verified preliminarily that the shakedown theorem is also applicable to reinforced concrete structures.Shakedown analysis and experiments revealed that with equal magnitude of loading, the variable repeated loading is more disadvantageous than a simply applied load to a structure. If the effects of variable repeated loading were considered in shakedown, a confident value of reliability of the structure with a definite economical results could be obtained.

This paper inferred the geometry firm degree formation which influence clasticity con-struction,in depth alternately each other,transport load acting. From general highly theoryof impetus instability,we not only consider the affection of shear effect when firm degreeformation is formed,but also consider it when geometry firm degree formation is listed.Asaresult,the construction about shear and infleet firm degree which are almost indistin-guishable, has an accurate instability edge,especially shear alter,the...

This paper inferred the geometry firm degree formation which influence clasticity con-struction,in depth alternately each other,transport load acting. From general highly theoryof impetus instability,we not only consider the affection of shear effect when firm degreeformation is formed,but also consider it when geometry firm degree formation is listed.Asaresult,the construction about shear and infleet firm degree which are almost indistin-guishable, has an accurate instability edge,especially shear alter,the result accuracy ofwhich greatly increased. Through practical calculation, the effect,which acts on geometryfirm degree formation by shear effect and the difference ignoring this kind of influences,provided the relevant impetus instability region.The calculating result is as same as the the-oretical analysis.For those engineering practical constructions which shear firm degree aresmall,the infuence which acts on geometry firm egree by shear effect should not be ignored.