@STrctPono thanks for the response
It means that the designer back in the 1930's did designed the bridge with brace, way long before seismic analysis was considered. WOW!
1. Are you wanting to put in the bracing to control lateral drift or because of slenderness issues?
- Actually I am not...
@BridgeSmith
Sorry I don't have definite picture of the Plan with bracing. Somewhat similar to STrctPono actually.
Here's another typical picture of another bridge, we simply add a column horizontal brace at mnidheight of the column
@STrctPono
Yes horizontal bracing at the midheight same...
Good day!
I would like to ask regarding the philosophy of multi-pile bent design of pier bridges. We are usually designing 2 column pier bent, with foundation resting either on bored piles or footing on piles. My design philosophy is to design those piers using additional moment as unbraced...
I am currently designing this foreign project (road widening). The height of the wall is 9 meters. The road widening is practically small that a MSE Wall will be impossible since there is an existing road. That is why the contractor opted to instead use Cantilever Wall on footing on piles...
Thanks everyone!
I have read all your comments, upon discussing this with proper authorities, we opted to use secant pile walls instead. We think it is the best choice.
Do you have links for the typical plans of secant pile walls? Or what should be included in the plans (general notes, typical...
Good day everyone!
We will be rehabilitating an interchange, which includes widening and bridge and roads.
We have a problem wherein the sloping sides of the embankment of an existing elevated bridge approach will be excavated because a road will be constructed beside it (see attached file, the...
May I know how to compute the lateral stiffness of a pile, I've read on some references and also from here that it is usually 40 kips/in (about 70,000 kN/m/pile), but I think this is also dependent on the material and diameter/dimensions of the pile.
Thanks!
Very Truly Yours,
- andru18
I have a query about the crack control checking for the new AASHTO LRFD Code.
for the Service Limit State, particularly in 5.7.3.4, it states the minimum spacing for the steel reinforcement CLOSEST LAYER. Some says that it should be the stirrups because it is the closest, but contradict with...
Ah, I got your confusion. Sorry for that. In our locality/country, the Maximum Experienced Water Level in a stream, whether it overtopped the banks or not, is called Maximum Experience Flood Level (MEFL).
To cut it short, so for a case of an overtoping waters in the river, you need a thorough...
Common Problem: MEFL or Flood Level is higher than the banks. We don't know whether the water came from the river or the water inland got caught up with the river. Area is practically flood-plain.
What are the usual measures/analysis for this kind of situation. Discharge capacity from Hydrology...
@lomarandil
That would be a good start, limiting the drift/displacement and force in the ends of the main bridge so not to affect much the viaduct
@yakpol
One question sir, since the main bridge is curved, and the viaduct is also curve, will there be a problem in the earthquake force...
@Lomarandil
I suppose the connection between the main bridge and the joining viaduct will be on simply supported with joints. The approaches will be on curved plan.
Very Truly Yours,
- andru18
Okay we have this bridge that is curved in plan. The approaches were made to be viaduct style instead of introducing massive retaining walls and embankments.
Question: Does the seismic design of the "Main Bridge" be separated with the viaduct? The main bridge will be on Type VI AASHTO Girders...
Bridge with minimal curve and super-E.
But what will be the configuration if the plan will be:
- the abutment A will be curve to the right, then the pier will be straight (normal) then the abutment B will be curved to the left
Very Truly Yours,
- andru18
Here's the link thanks!
Very Truly Yours,
- andru18http://files.engineering.com/getfile.aspx?folder=0c597bd9-0ab6-43f1-b8a0-31586c478010&file=Bridge_Final_Alignment.pdf
We have this problem for the scheme of the bridge, to get the optimal length and height.
I have some clarifications on the allowable/standards/usual guidelines in the design.
1. What is the maximum grade/slope for road approaching the bridge? (excluding the approach slab and additional minimum...
Thanks for the replies!
Actually because of lack of funds, and proportioning of the sizes to satisfy stability and concrete shear capacity.
Can I follow ACI 11.2.2.2?
Very Truly Yours,
- andru18
