Boiler Supporting Structure and Boiler Roof in India

Structures Analyzed with Dlubal Software

  • Customer Project

Customer Project

The boiler supporting structure with a combustion chamber 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 to the boiler supporting structure. Half of the platforms (at a height of about 70 m - 122 m) hang in the final state as "hanging houses" on the brackets of the boiler support.

At the rear wall, the flue gas duct (d ~ 49 ft) is also suspended on 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) were 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 08/30/2022

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