MONITORING THE SEASONALLY FROZEN SOIL EFFECTS ON THE DYNAMIC BEHAVIOR OF A PARKING GARAGE IN ANCHORAGE, ALASKA
This paper presents the results from experimental and analytical studies of seasonally frozen ground effects on the dynamic properties of a three-story unheated RC parking garage in Alaska, USA. Both ambient and forced-vibration test data were collected with a 16-channel portable accelerograph. The test data were processed and analyzed by system identification software ARTeMIS Extractor to identify the structural dynamic properties. Meanwhile, a three-dimensional Finite Element model including both superstructure and soil has been developed in order to simulate the seasonally frozen ground effects. It is found through the field tests and further confirmed by FE simulation that the fundamental frequency of the structure-soil system increases nearly 50％ as the frost action penetrates from the ground surface to 1.5m deep. The FE results also indicate that the dynamic properties of a RC garage structure are only sensitive to the freezing of shallow soils (up to 1.5 to 2m).
Fei-Fei Bai Zhao-Hui Yang Feng Xiong He Liu
School of Engineering, University of Alaska, Anchorage, USA
国际会议
长沙
英文
867-872
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）