I am very happy to announce the release of LEMSlope 0.3.0.
This release includes an exciting new feature – GUI model input. It is understood that not all users are familiar with Python language and creating analysis model through graphical user interface may be a better choice for some users. A tree structure is able to be used in this release now to set up the analysis model. The model set up with GUI can be converted to Python script and vice versa.
An additional new feature is copying svg file (Ctrl + Shift + C) and pasting the file into MS Office programs without exporting the svg file.
LEMSlope 0.2.0 is available today. This release focuses on reinforcement, new soil models, and running program with command line.
Reinforcements in LEMSlope consist of geosynthetics (geogrid and geotextile), soil anchors, and soil nails. Geosynthetics are considered as extensible reinforcement and factor of safety dependent, which means that the geosynthetics are share the same factor of safety of the slices. Soil anchors and soil nails essentially have similar setup. Soil anchors and soil nails are considered as inextensible reinforcement and factor of safety independent; therefore, reduction factors are required to be used in the input. Different friction resistances can be specified for different sections on a single soil anchor, which provides flexibility for considering anchors installed in different soil strata. At the same time, concentrated resistances can also be used to simulate individual helixes on soil anchors.
The exact start point is not required to add a reinforcement element. The program will find the nearest ground surface based on the provided elevation. Multiple reinforcement elements can be easily added with a Python loop.
New Soil Models
With this release, users can run the program in command line mode without graphical user interface. The input file can be either LEMSlope file *.lem or Python script *.py. The analysis results will be write into *.lem. The *.lem file is in JSON format and readily to be parsed to retrieve the results. The command line format is:
After some hard work, I am very happy that PyPile 0.9.0 is released today. There are several new features implemented in this release:
Reinforced Concrete Piles
Round piles and rectangular piles with reinforced concrete material are readily available for lateral pile analysis. Pile moment-curvature relationship graph also incorporated in this release.
With the rapid growth of solar power industry, finned piles are used more and more to resist lateral loads. Finned piles are implemented in this release to help engineers quickly estimate the impact of the fins on the pile lateral resistance.
Predefined General Pile List
If some pile types are used on a daily basis, a predefined pile list will speed up the data entry process. In PyPile, a predefined pile list is saved in an Excel file and the list can be updated by users. Each pile class is saved in a separate sheet.
Please feel free to let me know if you have any comments or suggestions, or if you would like to report any bugs.
LEMSlope can quickly generate geometry model with parametric input for slope stability analysis. If you have already had Slope/W in your firm, you can still take advantage of the parametric model generation with LEMSlope.
The following video shows how easy you can set up the model geometry in Slope/W with data in LEMSlope.
I am so excited to release the first version of LEMSlope today. I believe LEMSlope will provide geotechnical engineers with new slope analysis experiences.
The initial motivation for creating LEMSlope is to have a declarative way to define the model geometry for slope analysis and free engineers from tedious geometry calculation, especially for design projects, in which many iterations of adjustment are required.
To ensure the declarative nature of model definition and maximize the flexibility, Python, as one of the most popular script languages in the world, is selected as the script language for LEMSlope. Many young engineers and student are familiar with Python. Even if you don’t know Python, the simplicity of the language should not steepen the learning curve too much.
Each analysis model, defined with the script, consists of one base case and one or many analysis cases. The analysis cases are based on the base case and modified with fill, excavation, phreatic surfaces, loads, and different materials.
The default script in the program should be able to provide users with a general idea about how the script structure looks like. Many example files are available in the example folder with the program package. The function cheat sheet in the program provides a list of all the modelling functions and associated function explanation.
Since this is the very first version, many functions are still in the todo list. If you think any functions need to be prioritized, please leave me a message or send me an email. Enjoy!
Compared to uniform piles, tapered pile has a varied pile width and varied bending stiffness along the pile length. Since usually the angle of tapering is relatively small, the lateral soil resistance affected by the pile width variation is relatively small. To analyze tapered pile under lateral load with PyPile 0.8.5, one can simply changes the pile bending stiffness along the pile length through User Defined Function bending stiffness type.
I am very happy to announce that BSTunnelLining is released today.
BSTunnelLining is a finite element modeling program using beam and spring elements to analyze multi-ring segmental tunnel linings.
This is just the very first version of BSTunnelLining. I believe that there will be many aspects of it required to be improved or implemented. I am more than happy to hear from you if you have any questions, suggestions, or comments.
I am very happy to announce PyPile 0.8.0 is released today.
After a long period of quiet time, I am so excited to announce the release of PyPile 0.7.0. Some significant changes and new functions will be discussed below.
Finite element method is implemented to replace the original finite difference method. FEM brings much higher flexibility for current functions and higher future extensibility for PyPile.
With this new release, lateral single ground springs, rotational springs, distributed springs provided by soils can be assigned to any depth along the piles. Piles can be fixed for lateral movement and rotation at any depths.
Concentrated lateral loads and moments, distributed lateral forces can be assigned to any depths along the analyzed piles. Distributed forces generated by relative soil movement can be easily applied to piles.
Distributed force generated by relative soil movement can be exported and used as input in other software programs, such as slope stability analysis programs.
In addition, weak rock and c-phi soil models are also implemented in this release.