8B. ANALYSIS PART 2

CHAPTER 8B 'ANALYSIS' 46 In the 'Procedure' only the vertical loads, i.e. the permanent G and the mobile Q loads for the combination γG G+ψ2Q (where γG depends on the SWD ), are applied in order to determine the initial stress of the structure. The coefficients of the vertical loads are shown in the following combination (where γG depends on the SWD). Subsequently, successive elastic analyses are performed where at each step the external horizontal seismic loads are imposed, which it is emphasized that they remain constant (i.e. their value does not change) in all analyses in the case of the orthogonal or inverted triangular distribution. Thus, according to the acting flexural stress and the corresponding available flexural strength in the members, the degree of static indeterminacy of the beam is continuously reduced by the creation of plastic joints, until finally the beam is transformed into a mechanism.