Design of Boiler Membrane Wall Support for Large Earthquake Actions

Abstract eng:
The submission contains a presentation of theoretical analyses and practical application of the results to the design of membrane (water wall) skeleton for two steam boilers installed in a highly active seismic region of Chile. Boiler membrane skeleton was one of the most difficult problems, which was necessary to solve during designing of the boilers. It was caused due to the impossibility to change design dimensions related to the technological process for steam production with required parameters, large dimensions of each membrane panel, important operation loads, but mainly due to strong interaction between the membrane skeleton and other parts of the steel support structure, due to which the dynamic response has a large influence on its operation and emergency loads. The computation of the seismic loads for membrane skeleton was performed using a sequence of analyses, but with interaction of surrounding construction. The membrane skeleton was solved together with buckstay system, dynamic behaviour of internal tube systems and with connection to steel structure through spring hanger elements and the guiding system. The theoretical and detail design of special highly ductile elements in the guiding system is the most significant part of membrane skeleton design solution.

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