Analytical investigation on the variation of natural frequencies with temperature

초록

It is well known through the observations of field measurements that natural frequencies of a bridge structure vary depending on the temperature change. However, few analytical investigations have been carried out to verify this observed phenomenon. In addition, it is also known that temperature varies through the thickness of a bridge deck system as reflected in the design codes, but the effects of temperature change on the natural frequencies of a bridge structure have not been analytically investigated properly. This paper introduces an analytical approach to predict the variation of natural frequencies due to temperature change through the thickness of a bridge. The proposed analytical method is applied to evaluate the properness of the design codes by comparing the determined analytical natural frequencies with the measured data.