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Hi everyone; I am not an Abaqus expert and would like to check the overall behavior evolution of a steel girder bridge under the effect of fatigue. I intend to apply a movable (dynamic) load on the deck equal to the Average Daily Traffic ADT and Average Daily Truck traffic times 365 days and...

Thank you

It is standard I think. https://files.engineering.com/getfile.aspx?folder=80b7ca66-2b26-49c7-b515-20312c91f06b&file=Step.jpg

Hi, I am modeling a steel girder bridge and I would like to assess the effect of an increasing damage level on the remaining load-carrying capacity. Therefore, I want to increase the live load for each damage case until reaching the maximum deflection/ stresses for each damage model. Is there...

Hi, I am modeling an existing built-up steel girder bridge (Shell element). The flanges have different thicknesses. The as-built drawings show that the connection is made by welding which stretches for a variable length (4 to 10 cm). When modeling, I didn't consider this detail. now, results...

Hi; I would like to conduct a FEA of a structure using a probabilistic approach. Is it possible in Abaqus? If yes, how to input statistical parameters of materials (mean value, variance, bias factor ...) to Abaqus? Thank you in advance.

So, you mean that there is no way to simulate this for my model (3D shell elements)? In my case, I am assessing the effect of damages on the whole structure (Live load deflection, Maximum stresses in main members ...). The first case of damages was corrosion in different locations. Now, I have...

Thank you for your answer. I found that XFEM can not be used for 3D shell parts. Is it possible to simulate cracks in 3D sell parts using seams(Special --> Crack --> Assign Seam)? Thanks

I am assessing the effect of cracks in steel bridges. I chose the mesh size of 50mm for the whole bridge. When I modeled the crack (Cut in the shell element), I made the mesh smaller in the cracked part. But I had different maximum tensile stress values in the cracked part with different...

Thank you for your answer. Do you recommend I input fail stresses for material?? If yes, does it mean the allowable stresses set by the code ?? https://files.engineering.com/getfile.aspx?folder=d291a46a-71eb-4d20-b161-d71d17d3f9b2&file=Fail_stress.JPG

What about the density or the thickness, can it be 0 to avoid any additional load to the structure?

Hi, I want to assess the load sharing contribution of the deck and secondary members (bracings, diaphragms...) in a non-composite steel girder bridge. I conducted the assessment for the 1st case (deck without secondary members). Now, I want to assess the contribution of secondary members but I...

Hi, I am conducting an analysis of a steel girder bridge. I have to check stresses to be smaller than the allowable value presented in the design code (JSHB 2012 Version). It is an Allowable Stress Design code which means that allowable stresses are a portion of the yield stress ( 50 to 60%)...

Thank you for your answer. Actually, I found that it is a FEM issue called Stress singularity, and it often occurs near the supports (which is my case). This article explains it: https://enterfea.com/stress-singularity-an-honest-discussion/ I shared it with you because I thought it might help...

Hi; I have truss (wires) members in my bridge model, and I want to assess axial (compression and tensile) stresses. In the attached screenshot, you can find the assigned beam orientation. In this case, which stress should I consider: S11, S22, or S33? Thank you in...

Hi, I got excessive stress near the bearing (roller) which is more than the allowable stress. The bridge I am modeling is an existing bridge. Thus, this local stress is not normal. I tried to refine the mesh near the bearing but it doesn't work. What is the solution to this kind of problem...

Hi, I have a bridge model made of two parts: the steel structure and the concrete deck assembled together using tie constraint. The model works normally. but since it is a non-composite bridge, I want to assess the stress in each part (steel girders and concrete deck) and mainly the bending...

Hi Guys; The model is for a non-composite bridge. At first, I put all loads in the top flanges of the girders but I got some unexpected results. Therefore, I want to introduce the deck to assess the difference. What is the best way to connect a concrete deck (Shell part) to steel girders (Shell...

Great, that's exactly what I wanted. Thank you so much.

This is what I am doing. But, that deflection is the total deflection, what I need is the live load deflection for the node with maximum deflection. Is there any way to determine the deflection for each step? Thank you in advance.