Research on dynamic response of historic timber structure with platform-foundation under metro-induced loads

摘要

Timber structure with high-platform foundation is the main form of historic buildings in China such as bell tower, drum tower and so on. Taking Xi'an Bell Tower as research background, firstly, according to theory of Euler Bernoulli beam in Winkler foundation, analysis model of train-track-foundation system was established, and then, time-history curve of metro-induced loading acts on tunnel structure is obtained by using the corresponding calculation program, which was implemented by Matlab, secondly, three-dimensional finite element model of the Bell Tower-soil-tunnel structure interaction was established, and by means of implicit dynamic finite element analysis, which was accomplished by ABAQUS/Standard, dynamic response law of the bell tower under the simulated metro-induced loads which had been got previously was obtained, and furthermore, evaluated according to the technical specifications, the conclusions can serve as a reference for dynamic response analysis and assessment of similar historic buildings which is caused by metro.