Leaderboard

Hello everyone. I would like to model eccentricity of columns and beam but I have encountered some problems using the insertion point in Etabs. Here are my questions: 1. What is the difference between using cardinal point and joint offset? I tried to joint offset a column as if it was offset using the cardinal point (eg. bottom left), but then the analyze results are different. Why? 2. When using the insertion point, we have to transform the stiffness. I did not do any offset but changed the transform stiffness option to "yes" then applied a point load at the top. Comparing to columns without stiffness transform, the results are different. Would anybody explain why? And when we use the insertion point, shall we transform the stiffness of the object with offset? Or shall we transform the stiffness of objects which have connection with the offset object as well? Appreciate!

Dear Waqas, Don't be confused. It is very simple. All you have referred to in your post, is about and applicable to minimum area of reinforcement, required to resist 'shrinkage and temperature movements' in slabs and mats. On the other hand, I have discussed the distribution of minimum reinforcement, required to resist 'shrinkage and temperature movements' only, reinforcement distribution shall be as mentioned in ACI section 7.12.2 (referred by you). However, when the slab or mat has to resist 'primarily, distribution of reinforcement shall be as per flexural requirements. In this case, total amount of 'As,min' has to be provided at each face of slab or mat subjected to '

I am Ali Ahmed, working as lecturer in University of Engineering & Technology, Lahore. I have completed my MSc Structural Engineering from the same university. I was the topper of my BSc Session (2004) & won four gold medals. Along with the lecturer-ship I am also participating actively in different research projects being carried out in UET Lahore.