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hi i have a building where i have a couple of columns relatively close to another and am finding that they are attracting axial loads under a lateral load only case (ie no gravity or live loads). The columns are pinned and thus it cant be frame action (and the results show they are carrying...

Bondek is a australian 'wrinkly tin' / metal deck that can be used to provide composite action ie the same as holorib / ribdeck etc. i suspect the query about it being welded to the bondek is because if one looks down on to the metal decking (bondek) from above, all you may see is the shear...

obviously CSI are the best placed to comment on how industry use their package, and i do not wish to sound contradictory to their advice. i have only previously reduced the bending stiffness of shear walls, ie M1, M2 and torsion, and not played with the axial stiffness, but this has been for...

i have been reading this thread and its earlier discussion (thread726-151169) and thought i may chip in.. i think a key criteria is that you need to use different properties and stiffness's for different analyis and thus i often have atleast 2 models at any one time, an ultimate model and a...

i have previously posted this under the moment frame and shear wall thread but got no responses... so try again! :-) i am starting on the design of a number of tall buildings, ranging in heights from 25-50 storeys and am aware that i need to design the stability systems to ensure that...

without knowing the geometry this is difficult to answer, but are the walls with the equal & opposite reactions resolving a torsion induced from eccentricity between the point of load application and the centre of stiffness?

i generally agree with the notion that RC slabs in most situations generally are not prone to vibration from 'normal human activity' due to their relatively heavy mass giving good inherent damping, however there are situations when this DOES need to be checked, such as when there is sensitive...

ps for clarity i should add to my previous post that im not involved in concrete supply at all! (im actually a structural engineer consultant...)

as well described already, the specifying of concrete needs to take into account not only the strength requirements, but also the durability and construction requirements. Many, if not most concrete repairs are due to either poor onsite workmanship such as insufficient cover to reinforcement...

i am starting on the design of a number of tall buildings, ranging in heights from 25-50 storeys and am aware that i need to design the stability systems to ensure that accelerations from wind are kept to allowable limits. I have a few questions on this: 1/ where can i find some stated...