Hi Guys. I was wandering if it is practically possible to use onion type dead end anchor for multistrand system applied to a beam. I am talking about S12( 12 strand anchor), S15, S19 or above. The constraint in my mind not use onion type is compaction of concrete ( since multiple onions would be...
Hello, I have looked into the book and I wanted to check how to apply it to my project. This is what I am planning:
1. Build a longitudinal grillage model. The box section would be divided into I sections for the interior and Sort of C section for the edge webs. The centroid of the individual...
Hello guys,
Is there any resource to see how to model a box girder bridge using grillage method? All the resources I come across are extremely theoretical, could you Please send me practical once.
Hello guys!
According to AASHTO or other equivalent bridge code is there a specified limit for single live stressing of post tensioned bridge beams or box girders? usually for building the limit is about 32 meters, does that apply to bridges?
Hello kootk, I am delegated connection designer. Since most of the decision is already made, pushing for truss action would require them to go back and verify all the steps they did before.I don't think they would agree.
Hello guys.
Recently I have come across a cantilever space frame structure( please see the attached pdf before reading the rest of the post for better clarity). for clarity of details I have attached pdf file showing some portion of the structure. while most of the connections are standard...
I think rapt is pointing in the wright direction.according to eurocode 2, memebers subjected to axial compression will experience enhanced level of Vrd,max. But this is if the provided axial compression is below 0.5fck. Beyond this limit the benefit start to decline gradually becoming zero at...
Thanks for the reply Kootk. but the diagonal struts spacing doesn't increase or decrease depending on the amount of shear reinforcement present in the section ( for stirrup, I don't have full information on CFRP). according to Eurocode the minimum angle the strut can have is 22 degree and the...
Most codes cover the case of beams deficient in shear reinforcement only and usually they propose CFRP to add to the shear strength of a beam on top of shear rebar and concrete. What would be the response of a beam which has a shear force that is more than Vrd,max? usually this case is solved by...
Hello! In what way could we utilize CFRP( carbon fiber) for columns that are provided with more rebar than the maximum allowed by the code? It is clear that CFRp can add the lack of ductility due to over reinforcement, but what design approach can be used? What design assumptions could lead to...
Hello guys,
while doing concrete jacketing for an existing column, the new jacketing rebar is it supposed to pass through beam column or slab column joint( option 2 attached picture) or drilling like 100mm or so and imbedding it with adhesive is sufficient(option 1 attached picture)? the...
Hello Guys!
I am working on a project where the building has only one semi basement. the building is more than 35 stories in height and it is suggested to use piled raft since the building isn't embedded enough to achieve lateral stability. the raft is sufficient for bearing capacity...
HTURKAK:
They say the following about beams in ram concept "The beams are not one dimensional, linear framing members like they are idealized in other programs" so they aren't frame elements, rather they are plate elements with membrane just like the slab.
The program allows top surface...
Hello!
Should there be any difference in the amount of deflection expected between drop beam and inverted beam. I have a finite element model of a floor where I am supposed to use an inverted beam. The deflection I get when I change the beam from drop to inverted is significant. It almost...
Hello guys!
Beyond the decompression moment lies the idea of partial pre-stressing. ACI based approach is to limit the tensile stresses at service load to a certain hypothetical limit based on the structural member type. This approach is heavily criticized by some Eurocode based books but not...
Hello guys.
I am experimenting with ram concept on how to use it for eurocode based post tensioned slab design. The program allows three design approaches. Stress, crack and stress plus crack.TR43 is referenced specially for flat slab design based on stress limits. Everything is clear about the...
EN 1992 section 7.4.1(4) states :
"The appearance and general utility of the structure could be impaired when the calculated sag of a beam, slab or cantilever subjected to quasi-permanent loads exceeds span/250. The sag is assessed relative to the supports. Pre-camber may be used to compensate...
Some features of CSI ETABS program that needs revision regarding capacity design to Eurocode 8:
BEAM:
1. while determining moment capacity of ductile beams, the program uses the moment calculated from analysis. this could be okay for beams with small difference between the amount of area of...
