Shaking table test of steel truss frame focusing on acceleration and strain response for post-earthquake buckling evaluation

Abstract Large-span steel structures have been widely adopted in stadiums, airports, factories, and train stations because they provide a large space for multi-functional use. To ensure business continuity, post-earthquake damage surveys structural status estimation of such important large-spaced buildings attracted increasing attention. Structural health monitoring using accelerometers is already widespread use; however, measuring the acceleration response alone cannot directly estimate individual members. Another potential approach to measure strain; its application building very limited. The goal this study establish method quantitatively determining large-scale truss structure immediately after an earthquake. Truss specimens were statically loaded or shaken by shaking table cause buckling damage, relationship between changes strain before progress investigated. properties both changed as progressed. However, amplitude measured on chord members showed significant change according while predominant frequency mode shape calculated from small. It was shown that observed out-of-plane deformation almost linear response, indicating possibility quantitative assessment measurement.