Design of Experiments for Structural Model Updating of Steel Structure using Dynamic Testing
Ansuman Panda1, Ginjala Venkata Ganesh2, Shivaraj Kashinath Panigavi3, Chakravarthula B Ajay Mani Teja4, Uppari Ramkrishna5, Kalyana Rama J.S.6, Mohan S C7
1Ansuman Panda, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
2Ginjala Venkata Ganesh, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
3Shivaraj Kashinath Panigavi, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
4Chakravarthula B Ajay Mani Teja, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
5Uppari Ramkrishna, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
6Kalyana Rama J.S, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
7Mohan S C, Department of Civil Engineering, BITS PILANI, Hyderabad Campus, Hyderabad (Telangana), India.
Manuscript received on 03 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript Published on 28 May 2019 | PP: 599-604 | Volume-7 Issue-6C2 April 2019 | Retrieval Number: F11090476C219/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: There can be a lot of uncertainty in material properties and dimensions of a structure when it comes to fabrication. For this reason, in many cases, the outcomes of the numerical and experimental modal analyses mismatch. For this, the numerical models of the structures need to be updated to match the experimental test results. Model updating is one way to develop a numerical model of structure in any analysis software by considering the dynamic properties. It is basically a method to equalize the dynamic properties of an existing structure with the structure being tested. The present study deals with the structural model updating of a three-storied steel building frame model using SAP 2000 and STAAD Pro V8i in comparison with the experimental results. The natural frequencies of the test structure are obtained using shake table testing or an impulse hammer test. The numerical model natural frequencies are simulated to match the experimental natural frequency (target value) using the proposed model updating technique. In this method, the material properties, geometrical element properties, damping properties of the structure are varied within the desirable upper and lower limits. Design of experiment (DOE) is adopted to predict the suitable chosen parameters to be varied by introducing valid upper and lower limits to the input (dependent) variables, output (response) variables, and control (constant) variables. The numerical results obtained from SAP 2000 and STAAD Pro V8i are then compared with the experimental results by varying different material and geometrical elemental properties thereby suggesting successful implementation of DOE. It is also observed that the model designed in SAP 2000 results are closely matching with experimental results and is considered to be accurate compared to STAAD Pro. Also, the comparison of earthquake response for experimental structure and numerical model are carried out and the responses are very well matching.
Keywords: Model Updating, Natural Frequency, SAP 2000, STAAD Pro.
Scope of the Article: Structural Engineering