Boiler Supporting Structure and Boiler Roof in India

Structures Analysed with Dlubal Software

  • Customer project

Customer Project

The boiler supporting structure contains the combustion chamber and is used as the main stiffening element of the coal‑fired plant in Neyveli, Tamil Nadu, India. The boiler supporting structure measures 100 ft x 100 ft x 406.8 ft and, together with the boiler roof arranged above, it has to withstand loads of about 50,706 t.

Structural Engineering Structural Analysis and Design
Voss & Kamb und Partner GmbH, Kaiserslautern, Germany
www.voka-kl.com
Contractor Alstom Boiler Deutschland GmbH, Stuttgart, Germany
www.alstom.com

Model

The engineering office of Voss & Kamb, a customer of Dlubal Software,  was in charge of the structural analysis and the connections.

Boiler Supporting Structure and Boiler Roof

The load capacity of the 406.8-foot-high boiler supporting structure amounts to about 9,259 t. Due to the high loading, the structure is made completely of box sections. At the floor level, the support sections have dimensions of 7.9 x 7.9 ft and a wall thickness of 3.1 in.

All platforms are fastened at the boiler supporting structure. In the final state, half of the platforms (at a height of about 230 - 400 ft) hang on the brackets of the boiler supporting structure as "hanging houses".

At the rear wall, the flue gas duct (d ~ 49 ft) is also suspended at the brackets of the boiler supporting structure.

Due to its location, the structure has to withstand very high wind loads. The analysis and design of the boiler supporting structure (including buckling analysis) was performed with RSTAB.

The boiler roof, with a load capacity of about 992 t, was analyzed and designed with RFEM. The model consists of a combination of members and surfaces (24.6‑foot-high beams of the boiler roof). Eurocode 3 was used as the design standard.

Connections in Tekla Structures

The model created in Tekla was imported to RSTAB using the direct interface. The structure was further modified during the analysis.

The detailing of the connections was again performed in Tekla Structures according to the structural analysis.

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  • Updated 21 June 2021

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