ANALYSIS
Pushover and static analysis of masonry structures
3Muri is a software for analysis of structures built in masonry and mixed materials through a non-linear (pushover) and static analysis. The strengths of 3Muri is its innovative computation method (FME) that is able to give more information on the structure’s real behaviour to seismic actions, aside an extreme simplicity of use.
3Muri offers a drawing area for insertion of the structure with intuitive controls, an engine for the creation of computation models and their solutions, and a post-processor for immediate presentation of the results and creation of the computation report.
3Muri was created by a joint project of S.T.A. DATA and the research group headed by Professor Sergio Lagomarsino, from the Construction Technique department of Genova University. Along with other specialists (eng. Andrea Penna and eng. Alessandro Galasco from Pavia’s Eucentre, and eng. Serena Cattari, Genova University) they finalized the theoretical aspects of 3Muri through laboratory’s experiments and analysis on real structures. That continuous collaboration guarantee an always updated software, completely operative and reliable for the most professional requirement.
Video:
Gallery examples
Modeling the structures
Analysis and results
MODULES
In addition to the main software, that is dedicated to the global analysis of the structure, there are the following optional modules available. You can buy only the necessary ones, optimizing costs. You can always integrate the 3Muri software with the modules you need.
Local mechanisms
When the box-like behavior is not sure due to a lack of connections between floors and walls, verification of local mechanisms (the control of the possible separation of walls out of their floor) is necessary. You can use the module Local Mechanisms to verify this, starting from the model used for the global verification. Integrated the model with geometric data, loads and constraints, you can perform the local verifications, just specifying the local area.
Sensitivity
The Sensitivity analysis is a calculation method useful to obtain a better understanding of the structural functioning and accurate planning of the site investigation plan. As known, doubts during modeling directly affect the evaluation of seismic safety. The sensitivity analysis methodology includes the identification of parameters groups that express the uncertainty degree, through the execution of multiple different non-linear analysis it identifies a level of sensitivity for each parameter in order to furnish a weight in terms of importance. The result is the acquisition of a better knowledge of the structure’s characteristics and the single elements contribution to the global functioning.
Multithreading
The module allows to speed up the calculation by selecting the calculation method and using the multiprocessor. Two different solver parameters are now available: the selection of the calculation method by dense matrices and or sparse matrices and the use of multiprocessor. 3Muri software performs the calculation using the FEM method (finite element method), that needs to know the stiffness matrix K. Performing operations using the sparse matrix algorithms, that can be easily compressed, makes the calculations faster with a less memory use. With the use of the multiprocessor you can perform each different analysis on a different PC processor, saving time.
EC6
The EC6 module makes available the Eurocode 6 for static verification.
EC8
The EC8 module makes available the Eurocode 8 for seismic verification.
Connecting with Axis VM
3Muri is a complete software with all the functionality for checking masonry and mixed structures. To complete the analysis and design with additional elements such as: special foundations (platee, poles, etc.), design new beams, pillars, sets, insert stairs or new plants, you can use Axis VM software directly connected to 3Muri. With Axis VM, you can automatically import what is done in 3Muri, obtaining an equivalent model for further processing.
EXISTING BUILDINGS
Modifications and improvements
Some existing structures can’t sustain the supposed seismic intensity, so it may be necessary to make reinforcement works.
Additionally, reinforcement elements may have been added over time to the structure that needs to be taken into account in the calculation model.
NTC Chapter 10 concerns the local modifications and improvements. 3Muri can easily simulate these interventions through a range of reinforcing elements such as chains, FRP applications, reinforced plaster, injections on walls, stiffening of floors etc.
You can also insert new elements such as beams, columns, reinforced concrete walls, steel frames and braces.
If it is not possible to determine the elements, you can make a simulation project using the elements that were expected at the time of the construction of the building.
For the design of these elements there is an automatic connection to the Piano NTC and AxisVM software. Further analysis can be made with the ET Engineering Tools and SaiTu programs.
MATERIAL LIBRARY – MAPEI
Now you can use MAPEI library of materials and strengthening systems for your structure models inside 3Muri. Download the library file and use it for free!
Installation instructions: Install the 3muri demo or the 3muri software, then download the Mapei Libraries file, save it in the same 3Muri installation folder, and run it by double-clicking it.