Abstract
To achieve rational and precise seismic response predictions of large span spatial structures (LSSSs), the inherent non-uniformity and multidimensionality characteristics of earthquake ground motions should be properly taken into consideration. However, due to the limitations of available earthquake stations to record seismic rotational components, the effects of rocking and torsional earthquake components are commonly neglected in the seismic analyses of LSSSs. In this study, a newly developed method to extract the rocking and torsion components at any point along the area of a deployed dense array from the translational earthquake recordings is applied to obtain the rotational seismic inputs for a LSSS. The numerical model of an actual LSSS, the Dalian International Conference Center (DICC), is developed to study the influences of multi-support and multidimensional excitations on the seismic responses of LSSSs. The numerical results reveal that the non-uniformity and multidimensionality of ground motion input can considerably affect the dynamic response of the DICC. The specific degree of influence on the overall and local structural displacements, deformations and forces are comprehensively investigated and discussed.
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Supported by: National Natural Science Foundation of China under Grant Nos. 51738007, 51808099, the Fundamental Research Funds for the Central Universities under Grant No. DUT20RC(3)005
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Zhang, J., Li, H. & Li, C. Seismic response of large-span spatial structures under multi-support and multidimensional excitations including rotational components. Earthq. Eng. Eng. Vib. 20, 141–159 (2021). https://doi.org/10.1007/s11803-021-2011-1
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DOI: https://doi.org/10.1007/s11803-021-2011-1