Boiler Supporting Structure and Boiler Roof in India
Structural Analysis and Design
Voss & Kamb und Partner GmbH, Kaiserslautern, Germany
Alstom Boiler Deutschland GmbH, Stuttgart, Germany
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 30.5 m x 30.5 m x 124.0 m and together with the boiler roof arranged above, it has to withstand loads of about 46,000 t.
The customer of Dlubal Software, engineering office Voss & Kamb, was in charge of the structural analysis and the connections.
Boiler Supporting Structure and Boiler Roof
The load capacity of the 124‑meter high boiler supporting structure amounts to about 8,400 t. Due to the high loading, the structure is completely made of box sections. At the floor level, the support sections have dimensions of 2.4 m x 2.4 m and a wall thickness of 80 mm.
All platforms are fastened at the boiler supporting structure. In the final state, half of the platforms (at a height of about 70 m - 122 m) hang on the brackets of the boiler supporting structure as "hanging houses".
At the rear wall, the flue gas duct (d ~ 15 m) 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 900 t was analyzed and designed with RFEM. The model consists of a combination of members and surfaces (7.50‑meter 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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Programs Used for Structural Analysis
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Design of steel members according to Eurocode 3