ProtaStructure addresses the effects of vertical earthquake action in design through two primary methods:

Approximate Static Approach
This method simplifies the consideration of vertical seismic effects by focusing on a modified gravity load case. Unlike other methods that incorporate vertical vibration modes or a dedicated vertical spectrum, it applies a fraction of the horizontal spectral acceleration to gravity loads. As a result, it offers a quick and straightforward way to approximate vertical seismic action without complex analyses. It is particularly useful for initial design estimates, providing reliable results in less time.

Modal Spectrum Analysis Method
For a more detailed approach, this method considers the vertical vibration modes of the structure alongside a vertical acceleration spectrum. The inclusion of these parameters allows for a more accurate assessment of how a structure responds to vertical seismic activity. By reflecting the structure’s behavior under vertical forces realistically, this method ensures higher accuracy in design.

ProtaStructure provides detailed guidance on using these Vertical Earthquake Design methods to help users optimize structural safety and meet relevant standards. Comprehensive resources are available in the attached documentation to support precise and effective design implementation.

ProtaStructure, developed by structural engineers, is committed to offering advanced tools for safe and efficient design. The 2025 release expands seismic capabilities and code coverage, setting a new benchmark for structural engineering software. Enhanced features provide robust solutions to complex challenges, including seismic assessments and vertical earthquake effects. This ensures engineers have the tools to create safer structures.

To explore the full range of new capabilities and see a complete list of supported design codes, refer to the “ProtaStructure Suite 2025 New Features” document on our website. You can also view successful projects in our Project Gallery and find practical guides, articles, and instant support in the Prota Help Center to enhance your experience and understanding of the software.