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Response Characteristics of Large Span Structures Subjected to Non-Uniform Vertical Excitations

The objective of this paper is to study the response characteristics of large span structures subjected to multiple vertical excitations by means of time history analyses. The spatial variation of ground motions are represented as the combined effect of wave-passage and incoherency. They are simulated by the method of conditional simulation based on the selected four series of typical recorded ground motions. Some important responses such as internal force, displacement are monitored and compared between different cases. These analytical simulations provide a tentative work for investigating destructive effects of the multiple vertical excitations which can be solidified by further study and post-earthquake survey.