As far as I have encoutered the combinations of External Moment Resisting Frames & Internal Shear Walls, External Shear Walls & Internal Moment Resisting Frames, Moment Resisting frames are comminly used in precast concrte buildings with the Moment Resisting Frames specially for one storey...
There is a circular intake tower with buttresses.
The structure is modeled as 3-d
When calculating the External Hydrodynamic Added Mass, should I use the radius of a circle including the buttresses?
The internal is of no concern as it is a simple circular area.
How should the External...
A 30m high Intake Tower with a 6m internal diameter has attached to it a ventilation shaft. Buttresses have been placed radially on the external diameter, extending 5m. Two of them help to form-hols the ventilation shaft.
QUESTION: Is it wise to place an external concrete shell so as to include...
There is a typical 4m cantilever retaining wall which is back filled 3m thus has a "free-board" of 1m
There is a scenario that water can rise at the side of the back fill up to the wall's crest.
The back fill is relatively permeable. It is clear that the relevant Mononobe Okabe formula will...
I am to design a culvert in the bottom of a water reservoir.
The culvert is to be constructed by cut & cover method and back filled by more than 50% of its span so as to meet the natural ground terrain.
On top of that there will be 2m of rip-rap and 27m of water.
Should I ignore the inertia...
A two span conrete bridge (20m+20m)(solid slab as deck continuous over pier and momolithically casted with abutments) is to be checked for seismic loads. The rigid deck model is to be used, Eurocode states that the earthquake effects shall be determined by specifying aa horizontal static force...
I am designing a chute spillway.
I was thinking of prescribing the concrete as C30/37 but I am having second thoughts of prescribing the concrete as C35/45
The environment is cyclic wet and dry. Hence according to Eurocode it is XC4 class designation.
The design working life of the structure...
IN SPILLWAY SLABS IS IT BETTER TO PLACE FIRSTLY THE REINFORCEMENT // TO THE WATER FLOW OR THE TRANSVESRE REINFORCEMENT OF THE SPILLWAY WHICH IS PERPENDICULAR TO THE WATER FLOW.
BY THE WAY THE COVER IS 75MM SO A MESH WILL BE PLACED.
Reinforcement to control cracking in a spillway slab is of the order of 60cm2/m.
If the reinforcement is placed in two layers the reinforcement cover should be considered as the average cover (layer1 + layer2)/2 or that of the first (top) layer.
