Does anyone know why there are two design ground water levels for the design of ELS system? The highest groundwater level is for ULS checking, i.e. overturning, strutural member design, and the lowest groundwater level is for SLS checking, i.e. dewatering settlement. Why a lower ground water...
I am a structural enginner and hope to seek for some advice on geotachnical concern. In typical strutted cofferdam, dewatering inside the site is required and we need to control the amount of groundwater drawdown outside the site to avoid excessive ground settlement. Does anyone know whether a...
As far as I know, when I design a pile cap, I need to check the direct shear in two orthogonal directions, and then I need to check the punching shear under the concentrated load or support. Then I have a question, should the provided shear reinforcement be the sum of the three components...
Does anyone know if I want to check the concrete cone failure according to the BS code(probably due to an anchor bolt), should be used the concrete maximum allowable shear stress, i.e. 0.8*(fcu)^0.5, or use the concrete shear stress, vc?? Thanks for reply!!!
If I have a L-shape bracket with bolts on each face anchored into the supporting R.C. structure subject to a moment and shear load, how can I determine whether the bolts will take tension or shear?
Thanks all for your reply. So there is no clear cut between a pin joint or fixed joint, just an assumption. Then I have a question, if I assume an all round welded joint, say a hollow section to another hollow section, to be pinned, will there be a problem? Since in that case I won' t check the...
When assuming the fixity of a steel connection, how should I assume whether it is fixed or pinned? For example, a rectangular hollow section welded all round to another hollow section. Is there a way to classify/justify whether a connection can be considered as rigid or fixed??
Thanks for reply.
