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Sofistik FEA is very powerful for analyzing almost any types of structure. Sofistik Infrastructure is a revit plugin for bridge geometry modeling. Allplan Bridge is rebraned RM Bridge, which is a very powerful bridge analysis and design software, but the current Allplan Bridge has only part of...

This is from "An Introduction to Geotechnical Engineering (3e)" by Robert Holtz etc I add "B" and "C" in the above figure. The "u0" is not the excess pore pressure, it's the background pressure which ensure the 100% saturation for the soil specimen. This is what I'm understanding When the pore...

The APDL basically models a grid (space truss) structure, and tries to optimize the section dimention of the truss to get minimum weight while maintaining the proper stress. When running /OPT in APDL, it shows Error: "There are too many levels of *Do" The OPT part is as follows /OPT...

As you can see, if I use Automatic meshing option, There are 4 divisions along Z dir. If I want to change it to 2 divisions along Z dir, There are errors How to change the divisions from 4 to 2 along Z dir? The model (v19.1) is attached...

https://www.technia.se/software/brigade/brigade-plus/ How to sweep the cross sectio along SPIRAL axis?

In most cases the Hexahedron Dominant Meshing will include Hexahedron, Pentahedron, Pyramid and Tetrahedron elements. I want to generate the Hexahedron Dominant Meshing with Hexahedron and Tetrahedron only. or convert the Hexahedron Dominant Meshing into a new mesh with Hexahedron and...

Ansys 2022 R1 Mechanical （Workbench）can be launched But Mechanical APDL shows lots of errors: "无法定位程序输入点" means ""Procedure Entry Point Could Not Be Located"" "动态链接库" means "dynamic link library"

something like Sydney Opera?

The 1st photo shows a 2-span continuous truss bridge. The 2nd photo shows a 2 simply-supported truss bridge. The span of continuous bridge generally is larger than simply-supported truss bridge. For shor span bridge, simply-supported bridge is easy to built and costs less.

Sofistik is the most powerful parametric modeling, analysis and design software. It can handel buidling, bridge, tunnel, cable, membrane, almost any structure. It can also handle 2D geotecnical problem. NO rival. Midas Gen for Building and Midas Civil for Bridge are also very powerful.

Findings: 1. Sofistik and RM Bridge have very similar results of internal forces in all the stages, 2. Midas Civil has very similar results of internal forces as those from Sofistik and RM Bridge in all the stages except the last stage. 3. The stress results from Sofistik and RM Bridge are very...

Thanks for the suggestion. I will try to compare the stresses from different softwares. The geometry linear analysis results from Midas (and Autodesk Structural Bridge Design) shows no change from stage 2 to 3 and from stage 4 to 5, which is the same as that in Doug's "morphed" result

Hi Doug, FE_struct1 and I both think there should be moment at support in stage 4, because the support location remains at the steel section centroid.

In realy project, there will be two arches, out-of-plane support such as wind bracing between arches will be available.

I follow you suggestion, replacing the self-weight with line load. The results from Midas are almost the same as before. There is no extra load in stage 3. But since concrete is hardened in this stage, the neutral axis is NOT at support. For Midas Civil If I use Geometry Linear & Accumulative...

I model the wet concrete. It has 5 stages Stage 1, Steel section Stage 2, wet concrete in the bottom tube Stage 3, hard concrete in the bottom tube Stage 4, wet concrete in the top tube Stage 5, hard concrete in the top tube As you said, when wet concrete is poured at STG 2, there is no...

For simplicity, I model the concrete rib as "precast" concrete, so it has both weight and stiffness at the same time. The supports in all 3 stages are fixed at center of steel sections. In stage 1 & 3, the center of gravity (CG) is the same as the center of steel sections, in Stage 2, CG is...

Below is the summary of moment from various softwares

@IDS 1. I didn't model wet concrete in my models, so the weight and stiffness of the concrete are added together in Stage 2 and 3. 2. As FE_struct1 and I explained before, there should be moments at pin supports at Stage 2

@IDS Thank you for the analysis. AFAIK, Strand7 has an option "Construction Sequence" for construction stage analysis. Did you use it in your analysis?