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Mander Concrete Model in SAP 2000: A Guide to Download and Use

Mander concrete model is a widely used model for simulating the stress-strain relationship of confined and unconfined concrete under cyclic loading. It was developed by Mander et al. (1988) based on the equations of Popovics (1973) for monotonic loading. The model considers the increase in both strength and ductility of concrete due to confinement by transverse reinforcement, steel jacket or FRP wrapping.

SAP 2000 is a popular software for structural analysis and design of various types of structures. It has a built-in library of material models, including Mander concrete model, that can be assigned to fiber elements. Fiber elements are one-dimensional elements that can capture the nonlinear behavior of cross-sections under axial force and bending moment. They are suitable for modeling reinforced concrete members such as beams, columns and frames.

In this article, we will show you how to download and use Mander concrete model in SAP 2000 for your structural analysis and design projects. We will also provide some examples and references for further reading.

How to Download Mander Concrete Model in SAP 2000

Mander concrete model is already included in the latest version of SAP 2000, which is SAP 2000 v23. You can download it from the official website of Computers and Structures, Inc. (CSI), the developer of SAP 2000. You will need a valid license and registration to access the download page. Alternatively, you can also use the link below to download SAP 2000 v23 directly:

https://www.csiamerica.com/products/sap2000/downloads

After downloading the installation file, run it and follow the instructions to install SAP 2000 v23 on your computer. You may need to restart your computer after the installation is completed.

How to Use Mander Concrete Model in SAP 2000

To use Mander concrete model in SAP 2000, you need to follow these steps:

Create a new model or open an existing model in SAP 2000.

Define the material properties of concrete and steel reinforcement. You can use the default values or enter your own values based on your design specifications.

Assign Mander concrete model to the concrete material. To do this, go to Define > Materials > Modify/Show Material > Concrete > Stress-Strain Curve > Mander Unconfined or Mander Confined. You will need to enter some additional parameters for Mander confined concrete model, such as confinement ratio, confinement effectiveness factor and confinement strain at peak stress.

Create fiber sections for your reinforced concrete members. To do this, go to Define > Section Properties > Frame Sections > Add New Property > Fiber Section. You will need to specify the shape, size and orientation of your cross-section, as well as the distribution and properties of fibers along the cross-section. You can use the built-in shapes or draw your own shape using polygons.

Assign fiber sections to your frame elements. To do this, select your frame elements and go to Assign > Frame > Section Properties > Fiber Section. You can also use the Assign menu or the Assignments spreadsheet to assign fiber sections to multiple frame elements at once.

Perform analysis and design of your structure using SAP 2000 features and tools. You can use linear or nonlinear static or dynamic analysis methods, depending on your project requirements. You can also use design codes such as ACI 318 or Eurocode 2 for reinforced concrete design.

Examples and References

To help you understand and apply Mander concrete model in SAP 2000 better, we have provided some examples and references below:

Mander's Model for Stress-Strain Relationship for Confined Concrete Download Scientific Diagram aa16f39245