Open topic with navigation

Calculation of deflection

The following type of deflection is calculated in code dependent deflection:

• Linear (elastic) deflection d_lin,y(z) - this deflection is calculated for total combination and for linear stiffness. Value of deflection is the same as values of deflection calculated in tree Results
• Immediate deflection d_imm,y(z) - deflection after applying permanent and long-term variable load calculated for short-term stiffness and immediate combination
• Short term deflection d_short,y(z) - deflection with taking into account cracking of cross-section/2D element calculated for short-term stiffnes and total combination ( combination defined directly in the Result case for deflection)
• Deflection caused by creep d_creep,y(z) - deflection calculated as difference between deflection calculated for long-term and short-term stiffness for creep combination

d_creep,y(z) =d_{creep,long,y(z)} - d_{creep,short,y(z)}

• Additional (harmful) deflection d_add,y(z) - deflection after applying variable load with taking into account deflection caused by creep calculated. The value is calculated as difference between total and immediate deflection

d_add,y(z) = d_tot,y(z) - d_imm,y(z)

• Total (long-term) deflection d_tot,y(z) - deflection with taking into account creep and cracking calculated as sum of short-term deflection and deflection caused by creep

d_tot,y(z) = d_short,y(z) + d_creep,y(z)

Generally , the components calculated can be graphically presented on the following figure

Only deflection in y and z axises of LCS of member is calculated for 1D member.For 2D member only deflection in z axis of LCS of member (deflection perpendicular to plane of 2D member) is supported

All types of deflection are calculated for each dangerous (linear combination) and maximal/minimal value from all combinations is presented in each section/elements.

Open topic with navigation