MODULAR SYSTEMS - Asma Germe

Suspension and Tension Modular Systems: Structural Design Principles, Modularity Logic, and Engineering Performance

Suspended tension modular systems are lightweight, flexible, and high-performance surface systems created by assembling individual membrane panels in a specific geometric pattern. The modular design enables rapid production, mass installation, easy maintenance, and scalability.

These systems are widely used for shading structures, temporary architectural solutions, atrium cladding, and lightweight roofing systems.

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Structural Principles

Suspended tension modular systems are based on the principle that the membrane surface operates stably under tensile stresses. Each module is a self-supporting unit that maintains its shape; when joined together, they form a larger surface.

Pre-Tensioning

On the edges of each membrane module:

1–6 kN/m pre-tensioning
Orthotropic material behavior
Cord–profile

ensures surface stability. Pre-tensioning prevents buckling within the module and provides resistance against wind loads.

Boundary and Connection Elements

Modules typically feature the following boundary elements:

Steel or aluminum frame profiles
Cable edge details
Cable channels
Module-to-module connection brackets

While the supporting subsystem remains stationary, the membrane modules are tensioned and installed independently.

The Logic of Modularity and System Design

In modular systems, the primary goal of design is to create repeatable panel types.

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Repeatable Panel Types

Typical panel geometries:

Triangular membrane modules
Rectangular (quad) panels
Free-form single-surface modules
Hyperbolic paraboloid (hypar) panel variations

These geometries provide high performance because they are suited to the natural stress distribution of tension membranes.

Suitability for Mass Production

Modular panel production:

Die-cutting techniques
CNC membrane cutting
Standardized edge and joint details

offers a solution that is both fast and cost-effective.

Assembly Logic

Installation generally involves:

Installation of the steel/aluminum support subsystem
Placement of module frames
Tensioning and attaching the membrane panels to the frame
Sealing the joints between modules

Materials Technology

Membranes used in modular suspension systems:

PVC/PES membranes
PTFE-coated glass fiber
PU- or silicone-coated technical textiles

. The flexibility, UV resistance, and pre-tensioning capacity of these materials affect the longevity of the modular system.

Edge Details

Edge Profiles
Steel Cable Edges
Load-bearing webbing

Inter-module connections can be designed as open joints when sealing is not required.

Structural Analysis and Calculation Process

In modular systems, the analysis process involves both the behavior of a single module and the interaction of the entire surface.

Single-Module Analysis

Each module:

Form-finding
Nonlinear membrane analysis
Is evaluated using maximum stress control.

System-Wide Interaction

Wind load effects can create different pressure zones between modules. Therefore:

Wind tunnel simulations
Shear force analysis at module connection points
Moment transfer from the modules to the load-bearing subsystem

are calculated.

Performance Criteria

Performance objectives for suspended tension modular systems:

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Structural Performance

No cracking due to insufficient tension
Control of flapping under wind loads
Modules operating rigidly in conjunction with the subsystem

Aesthetic and Functional Performance

Visual consistency of repeating module geometries
Surface continuity (e.g., minimal seams)
Shading and lighting performance

Maintenance and Replaceability

The modular design allows for the replacement of only the affected unit when a panel is damaged. This offers a significant advantage, particularly in open-air structures.

Areas of Application

Suspended modular systems are typically used in the following areas:

Suspended tension modular systems are one of the indispensable solutions in modern architecture thanks to features such as light weight, quick installation, ease of maintenance, and aesthetic flexibility. With proper pretensioning, a modular panel design, durable edge details, and a reliable supporting subsystem, it is possible to create a surface system that is both durable and high-performing.