Asian Journal of Engineering and Applied Technology (AJEAT)
Behaviour of Thermal Power Plant Boiler Support Steel Structure under Seismic Excitations
Author : R. Arun Kumar and C. UmaraniVolume 8 No.1 January-March 2019 pp 74-80
Abstract
Static and dynamic analysis of a thermal power plant boiler support steel structure is carried out to study its behaviour and responses. Non-Linear Time History Analysis (NLTHA) method is adopted to study the behaviour and response of the structure in addition with Equivalent Static Analysis (ESA) and Response Spectrum Analysis (RSA) methods using SAP2000 software application. Though NLTHA method is not used extensively in Indian boiler support structure design practices, in the present study, an attempt is made to study about the realistic behaviour and performance of boiler support steel structure using NLTHA. Three different ground motions are used for analysing the boiler support steel structure with compatible scale factors and during the analysis, behaviour of the structure under different seismic excitations are usually compared in terms of [5] load-deflection, moment-rotation, moment-curvature and stress-stain relationships. Hence it is found that NLTHA method provides more accurate and dynamic results compared to the ESA and RSA methods. Various seismic demand parameters like mode shapes, displacements, drifts, base shear forces, floor accelerations and floor response spectra curves are presented in the results to understand the behaviour and response of the boiler support steel structures during the seismic excitations.
Keywords
Boiler Support Steel Structure, Ground Motion, Equivalent Static, Response Spectrum, Non-Linear Time History, SAP2000, Scale Factor, Mode Shape and Excitations
Full Text:
References
[1] IS 1893 (Par-1 & 4) Criteria for Earthquake Resistant Design of Structures.
[2] IS: 800-1984 & 2007 Indian Standard code of practice for general construction of steel.
[3] IS: 875 (Part 1 to 3) – 1987 Code of practices for loads.
[4] Computers & Structures Inc, SAP2000, Automated Lateral Loads, October 2016.
[5] C. V. R. Murty, Rupen Goswami, A. R. Vijayanarayanan and Vipul V. Mehta, “Some Concepts in Earthquake Behaviour of Buildings”.
[6] N. S. Trahair, M. A. Bradford, D. A. Nethercot and L. Gardner, “The Behaviour and Design of Steel Structures to EC3”.
[7] Anil K, Chopra, Dynamics of Structures, 2007 Edition.
[8] Mario Paz and William Leigh, Structural Dynamics, Theory and computation, 5th edition.
[9] C. F. Beards, Structural vibration: Analysis and Damping.
[10] A Minigraph by Ajai S. Pisharady, A. D. Roshan and Vijay V. Methekar, Seismic Safety of Nuclear Power Plants
[11] Ziguo Xu, Chongcui Ren and Congzhen Xiao, CTBUH Research paper: The Aseismic design and nonlinear dynamic analysis of a 350m high braced steel frame.
[12] Bungale S. Taranath, Wind and Earthquake resistant buildings structural analysis and design.
[13] E. Cruz, R. Garcia, G. Vera and D. Valdivia, “Evaluation of a Simplified Analysis Model for the Earthquake Response of a Coal Fired Boiler and its Steel Support Structure”, Journal of WCEE, The 14th World Conference on Earthquake Engineering, Beijing, China, October 12-17, 2008.
[14] T. Hari Krishna, M. Penchal Reddy and K. Baskar, “Static and Dynamic Analysis of Boiler Supporting Structure Designed Using Concrete Filled Square Steel Tubular Columns and Comparison with Structural Steel Columns”, International Journal of Science and Research (IJSR), Paper ID: 02015607, Vol. 3, No. 8, August 2014.
[15] Motoki Kato, Kunihiro Morishita, Masaki Shimono, Yasuharu Chuman, Takashi Okafuji and Toshiaki Monaka, “Development of Rational Design Technique for Frame Steel Structure Combining Seismic Resistance and Economic Performance”, Mitsubishi Heavy Industries Technical Review, Vol. 52, No. 1, March 2015.
[16] Kiyoshi Muto, Koji Shibata, Taunehisa Tsugawa and Kazuhiko Yamada, “Earthquake Resistant design of Boiler building of thermal power plant”, Journal of WCEE, Proceedings of Ninth World Conference on Earthquake Engineering, Tokyo-Kyoto, Japan, Vol. 6, August 2-9, 1988.
[17] [Online] Available: https://strongmotioncenter.org/