Hello
I'd be grateful if someone could shed some light on my problem which is keeping me awake through the nights.
I am assessing a bridge deck and its construction is RC deck (280mm thick) spanning between the abutments (span is 7m). Fairly simple deck. The concrete is of 20.7N/mm2 strength...
Does anyone know shear force and bending moment formula for two unequal span continuous beam loaded with varying distributed load? or loaded with a point load at any location? Similar to this beam but with a VDL instead of UDL.
https://imgur.com/a/RjFQGgk
Thanks.
I'd be grateful if anyone can guide me in the right direction.
A flat plate 2m x 2m with a thickness of 20mm (Stainless steel with fy = 220 N/mm2) is supported on two of its parallel sides and a its acting as a wall inside a chamber. The loading on this plate is a hydro static load.
Am I...
Hello
I am currently assessing a bridge deck by grillage analysis. The deck consists of T4 prestressed beams closely spaced together (500 crs) and fully infilled with insitu concrete with 75mm topping.
I have modelled the longitudinal grillage member representing the main prestressed beams...
Hello and thanks for your valuable advise.
I am struggling with something that has been bothering me for a while. This is regarding finding out the ultimate bending resistance of a rienforced concrete section. I have attached the hand calcs.
The concrete section in the question already has an...
Hello
I am struggling to find the shear capacity of a concrete section with no shear or tensile reinforcement at all and was wondering if anyone can help me with it.
BS5400-4 and BD44/15 suggest a formula for concrete capacity which is based on the tensile reinforcement ratio (100.As/bd) but...
Hello
Usually the strut in the STM is in compression but I have seen many cases where the struts come out in tension. For example when a pilecap has a large bending moment and it experiences lift off on one side, this would result in some of the struts being in tension.
Eurocode gives guidance...
Hello
I am trying to model a typical steel-concrete composite beam on LUSAS (its a Finite Element Software).
The actual steel beam has shear studs so the action between steel and concrete is definitely composite.
Can anyone tell me if I model the steel beam and concrete both as shell...
Hi there
I'd like to get some opinion on designing a concrete arch bridge. I have modelled the arch in Lusas and have a bit of confusion in what stresses should I use for its strength check.
The normal stresses or principal stresses? Principal stresses are a little higher than normal stresses...
Hello all,
I am trying to calculate the thermal stresses and forces developed into the concrete deck right at the centre line of columns, as attached in the picture.
- The difference in temperature is taken as 30 deg Celsius.
- Coefficient of thermal expansion of concrete is 12e-6
- Width of...
Its been days since I have been struggling to get the right second moment of area for a composite beam.
Attached is the section in question. Concrete slab on top of a steel trapezoid girder. I just can't get the moment of inertia for the two inclined webs of the steel girder. Tried every...
