I am using Leap Bridge Concrete to design a skewed wall pier. After analyzing the pier, I noticed that for the braking force, that the sum of the forces in the z-direction at the top of the wall did not equal the sum of the forces in the z-direction at the bottom of the wall. Additionally, I performed hand calculations to compute the moment at the bottom of the wall by taking the force in the z-direction at the top of the wall and multiplying it by the wall height; this moment did not match the moment that the program computes. In order to look into this further, all of the loads in the file were deleted except for a single braking load. A 100 kip force was applied to the top of the wall at each end as a braking force, and again, the forces and moments the program computed at the bottom of the wall were different from the forces and moments expected when doing simple statics. To try to further zero in on the problem, the compressive strength of the concrete in the wall was increased from 3000 psi to essentially infinity (i.e. 3000 x 10^20). After analyzing this using the program, the force in the z-direction and the induced moment about the x-axis at the bottom of the wall were then the same as what one would expect doing simple statics. We also tried doing this same exercise with a Friction FR force, and got the same results, so it isn't just the braking force causing the concern. Additionally, we tried running the program with 0 skew and got the same results.
Has anyone else had this happen? It appears this is all related to how the program accounts for the stiffness of the wall, but it is difficult to justify that the results being produced by the program are correct. I tried attaching my file, but get an error message. Please provide me an email address I can send my file to.
Please see file attached. I am using version 17.00.01.01. Thanks!
Please email me the concerned skewed file to Vinay.mysore@bentley.com