WARNING- Deflection check of member # 11 will not be performed as DFF value not provided.
I am getting this warning: WARNING- Deflection check of member # 11 will not be performed as DFF value not provided.
I am sharing the input command. Please provide your view.
STAAD SPACE START JOB INFORMATION ENGINEER DATE 15-May-23 END JOB INFORMATION…
Ram Concept Implementation of ACI 24.2.3.8 Ig for PT Slabs
How does Concept implement section 24.2.3.8 of ACI318-14 which permits the deflections of Class U slabs to be based on Ig? I am working on a model where the plots for Ieff/Ig for the load history deflections indicates significant reductions in stiffness…
New Training - RAM Concept - Specifying Deflection Checks
Learn how to incorporate Deflection Checks into your Concrete Slab Design workflow in RAM Concept, including:
Specifying the Deflection Check Criteria
Assigning Deflection Checks
Reviewing the Deflection Limit Results
Deflection checks are…
Deflection Load Case
When viewing a specific beam Diagram, does the selected Load Case change the shown deflections? Wondering if my deflections for each load case are in fact very close/the SAME... or if deflection is purely D+L serviceability deflection?
Secondly is D…
Definition of Deflection Loads
Can someone please define/review my understanding of the following Deflection loads shown in the beam results report?
Initial Load = dead and live construction loads + deck and beam self weights
Live Load = live load
Post Comp Load = super imposed…
How does RAM Compute the stiffness for deflection of a cantilevered beam?
In Ram, I am designing a beam with a short cantilever per AISC 360. I am curious about how the program computes the deflection when I define the beam as composite, since the stiffness (Inertia) under live load varies depending on the span loaded. Does…
STAAD.Pro Steel Deflection Oddity
I have a situation in STAAD.Pro version 22.08.00.175 where the code check (AISC 360-16 LRFD) is giving me wildly different answers than I see when inspect the element interactively. This is causing the SELECT function for this steel design to fail.
…
version 17.03 issue/bug when setting demand/capacity limits
Good Afternoon,
My computer updated RAM to the latest software version 17.03.00 285 SES overnight, and my model went from no beam design errors to 1500 deflection errors. Upon investigation I discovered that this is happening because RAM seems to…
Staad Pro Deflection check for AISC 360-16
I have a Staad Pro model that I am using AISC 360-16 to design. I have my DFF and DJ1 and DJ2 parameters applied by there's no deflection showing in the analysis output report. I read from https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki…
STAAD User Tool: Assign DJ Parameter to Physical Member
User Tools: Assign DJ Parameter to Physical Member
Created by: Surojit Ghosh
Description :
This is an excel based OpenSTAAD macro which can assign design parameter DJ1 and DJ2 to physical members present in a STAAD model. If you open a STAAD model…
94 times deflection failure, can't see where program is getting the deflection from.
Hello, I have a large steel industrial building that I am only trying to do a deflection check on in this model. The strength design is done in a different model under AISC 2016. This deflection model is under AISC 2010 as I have been directed by coworkers…
RAM Frame Deflection - Graphical options
Is there a way to graphically view the deflection, deflection magnitude, and node number in RAM Frame for a certain load case and/or load combination?
Thanks!
Extreme Lateral Displacement
I am getting extreme lateral displacements for one diaphragm in my model (100s of inches). The remainder of the model is behaving as expected. I'm not sure what could be causing this as I've gone through a lot of trial and error. Any help would be appreciated…
RC slab deflections
Hi all,
Deflection results from the RAM Concept model don't seem to be correct. I've spent hours on this and cant figure out why this is the case. Any input is appreciated.
For example:
- 200 slab, 10.4m x 8m bay - only 16 mm long term strip deflection…
PDF
RAM Concept - External Shrinkage Restraint for Multi-Story Concrete Structures
The purpose of this article is to establish an appropriate Shrinkage Restraint percentage to use for a typical intermediate concrete floor in a multi-story structure. The calculations demonstrate how construction sequence and varying shrinkage rates of…
Deflection Check Does Not Work
I have large W-beams that span 60ft +/-.
At the center of these beams I am getting a deflection of +4inch, 60ft x 12in/ft / 240 = 3" NG (DFF = 240)
I have used the dj1 and dj2 parameters, so the check should be over the full 60ft
I only have gravity…
RAM Concept Load History Deflection Analysis Results Table
RAM Concept’s load history deflection calculations are complex due to the many non-linear behaviors that are considered (see Load History Deflection Calculations for more information). When unexpected results are obtained, it can be difficult to verify…
RAM Concept Load History Deflection Calculations
Long-term concrete deflections are difficult to predict due to the influence of several non-linear behaviors that complicate the calculations. Historically, design engineers have relied on approximate methods, like deflection multipliers, to simplify…
Max Short Term Load Deflection
Hi there!
I am working on a 2 way podium slab and do not quite understand why I am finding a difference in the Max Short Term Deflection and the Service LC for max deflection.
In my model after running it I check the Service LC: D+L Max Deflection…
Fixed End Composite Beam Deflection In RAM Beam
It would be very useful to be able to calculate the deflection of fixed-end composite beams in RAM Beam.
RAM Concept - Load History Deflections Not Converging
Hi,
I have two RAM Concept suspended slab models which will not converge when running the load history deflections and I am at a loss as too why. Below is the warning provided in the Load History Calc Log:
WARNING: An error has been found while…
RAM Elements Member Deflections (TN)
Applies To
Product(s):
RAM Elements
Version(s):
All
Area:
Design; Analysis
RAM Elements - Member Deflections
In RAM Elements, member deflections are calculated from the finite element results. Internally…
RAM SS Frame - Net Deflection on Cantilever
RAM is returning the wrong net deflection value for cantilevered members in Frame. See images below:
<<< net deflection incorrect
<<< gross deflection correct
Also the graphical output is not very good since the numbers are often right on top of…
RAM Concept Deflections for Service Load Combination
Howdy,
Are the deflections reported in the Max and Min Deflection Plans under a given load combination layer, say Service LC: D+L, based on cross-section effective moment of inertia? Can RAM Concept report max and min deflections based on cross-section…
UC Ratio problem
warehouse.zip
wind calculation also in that folder.... try to fix this probem guys