8B. ANALYSIS PART 2

CHAPTER 8B 'ANALYSIS' 124 In addition, the sea blue squares that appear at the ends of the elements indicate shear failure. At the end of the member that fails by shear, the box appears, while in the next step the program creates a plastic joint at this point with simultaneous reduction of θy as provided by the CEE for the elements that fail first by shear, and continues the process of completing the pushover analysis. IMPORTANT OBSERVATION: For the beams and for the poles we have the following strengths - Vrd,s - Vrdmax - Vr Especially for the poles we also have the - Vr,sls • For an element to be classified as sandy, the ratio of the shear stress to the lower of the above strengths must exceed unity. Then the program the square shall be taken as a marker and the procedure shall be followed to modify the parameters determined by considering a flexural failure, so that they are effectively reduced from a plagiform failure to a slip failure (reduction θy, etc.). • In the controls (on the printout), those items are shown whose reason is greater than unity and is derived from all strengths, except Vrd,s which is the strength of the fasteners. In the graphical representation, however, the squares are also shown for this failure (from Vrd,s). So when squares appear in the graph and the corresponding elements do not appear in the controls, it is an excess of Vrd,s. It is noted, however, that also by exceeding Vrd,s the procedure for reducing the flexural failure normally follows. The second way of visualization is to select the first step and by pressing the button you can see the vector in motion with the creation of the plastic joints. You end the command by selecting the same key again. The same effect can be achieved by selecting a step and turning the mouse wheel. The options , , and give the deformation state of the vector for the three performance levels respectively, i.e., they show the vector at analysis step where the control node movement is equal to the corresponding target movement. The coloured points above on curve correspond to to three performance levels: • Station staff : blue • Staff station : yellow • Stopping point : red