Fat

Fatigue failure of the structure or structural members. Serviceability limit states correspond to conditions beyond which specified service requirements for a structure or structural member are no longer met. Exceeding these limits causes limited damage but means that the structures do not meet design requirements functional requirements (not only of the structure, but also of machines and services), comfort of users, appearance (where the term appearance is concerned with high deformation,...

Info

NOTE The y values may be set by the National annex. * For countries not mentioned below, see relevant local conditions. The characteristic value of seismic action for ULS verification is fixed by Eurocode 8 (EN1998), based on a return period of 475 years, corresponding to a probability of 10 of being exceeded in 50 years. It is possible to modify the return period by means of an importance factor yi. The frequent value and the quasi-permanent value of floor loads on building are determined so...

Regan 24 Punching Shear

Punching capacities related to resistance of the shear reinforcement (Regan 24 ) modified upper limit has been defined according to MC'90, according to VRd,max 0.5v fcd u0 d where u0 is the length of the column periphery, and v is equal to v 0.60 (1-fck 250) The distance from the column to the inner shear reinforcement should not be larger than 0.5d, nor should it be less than 0.3d, since steel closer than this will not be well anchored in the compression zone if intersected by...

Nfcd Stress Distribution Stress Block

0 0.5 10 IS 2.0 2.5 3.0 3.5 4 0 EcPUJ 0 0.5 10 IS 2.0 2.5 3.0 3.5 4 0 EcPUJ Figure 3.12. Comparison of basic and approximate design curves In clause 3.1.6 4 of EC2 as well the possibility is offered to work with a rectangular stress distribution, see fig. 12. This requires the introduction of a factor A for the depth of the compression zone and a factor n for the design strength, see Fig. 3.13. Figure 3.13. Rectangular stress distribution Figure 3.13. Rectangular stress distribution As a basis...

S

E02 the greater of the two first order eccentricities fo h slenderness corresponding to the limit for 10 moment increase at y 0 n relative normal force N Actcd nu0 load capacity for the current slenderness and y 0 yet effective creep ratio y- nL a here y 3 has been assumed nu1 load capacity including the effect of creep according to 1- step method nu2 load capacity including the effect of creep according to 2- step method The agreement between the 1-step and 2-steps methods is in most cases...

L L

Mi, Mi restraining moments in members 1, 2 , see Figure 5.15 Ma restraining moment in the adjacent column, see Figure 5.15, calculated without taking into account the axial force Na a Na Nea Na axial force on the adjacent column Nea buckling load of the adjacent column can be estimated approximately, e.g. taking into account only the horizontal members adjacent to its nodes 5.8.3.3 Global second order effects in buildings Figure 5.15. Illustration of node with adjacent members. Figure 5.15....

Ofp

0 0.5 1.0 1-5 2.0 2.5 3.0 C d o 0.5 1.0 1.5 Figure 6.47. Shear capacity of column bases 0 0.5 1.0 1-5 2.0 2.5 3.0 C d o 0.5 1.0 1.5 Figure 6.47. Shear capacity of column bases 6.5 Design with strut and tie models See example n. 6.15 No comments No comments Aparicio,A., Calavera, J., del Pozo, F.J., 2000 Testing strut compression shear failure in beams, Polytechnic University of Barcelona. Asin, M. 2000 , The behaviour of reinforced concrete deep beams, PhD-Thesis, Delft University of...

Fdb

Pile Axial Force Bending Moment Diagram

Once determined x e as, the moment resistance results MRd - A'sfyd h-d' Asas -2-d P1xbfcd 2-P2x d In the fourth field NRd3 NEd NRd4 the moment resistance can be determined, with a good approximation, by the relation of proportionality indicated in fig. 6.8, which shows the final end of the interaction diagram M-N. Figure 6.8. Terminal end of the interaction diagram M-N The moment resistance reaches a maximum for x x2 where the analytic function that expresses it has an edge point due to the...

Euro Code Slenderness Moment Magnification

Effective creep ratio as a function of ratio Ml Md for a cracked rectangular cross section with tensile reinforcement only, based on d 0,9h and a 6. Basic creep coefficient 9 3 Figure 5.22. Effective creep ratio as a function of ratio Ml Md for a cracked rectangular cross section with tensile reinforcement only, based on d 0,9h and a 6. Basic creep coefficient 9 3 In this case the curves will approach the straight line according to expression 5.19 the higher the reinforcement ratio...

Creep Coefficient Eurocode

Stress Strain Relation For Concrete

Where t0 is the creep coefficient related to Ec , the tangent modulus, which may be taken as 1,05 Ecm as from Table 3.1-EC2 . Annex B of the Eurocode gives detailed information on the development of creep with time. Where great accuracy is not required, the value found from Figure 3.1 may be considered as the creep coefficient, provided that the concrete is not subjected to a compressive stress greater than 0,45fck tc at an age to. The values given in Figure 3.1 are valid for ambient...

Prof J.hellesland Slenderness

9ef effective creep ratio see 5.8.4 if ef is not known, A 0,7 may be used ro As yd Acfcd mechanical reinforcement ratio if ro is not known, B 1,2 n may be used As total area of longitudinal reinforcement n A Ed Acfcd relative normal force M01, M02 first order end moments, M02 gt M01 2 If the end moments M01 and M02 give tension on the same side, rm should be taken positive i.e. C lt 1,7 , otherwise negative i.e. C gt 1,7 . In the following cases, rm should be taken as 1,0 i.e. C 0,7 - for...