Effect of Temperature Variation on Modal Frequency of Reinforced Concrete Slab and Beam in Cold Regions

• DOI: 10.1155/2016/4792786
• Publication Date: 2016-06-28T21:31:26Z
• Authors: Hanbing Liu; Xianqiang Wang; Yubo Jiao
• Keywords: Slab

Changes of modal frequencies induced by temperature variation can be more obvious than those caused structural damage, which will lead to the false damage identification results. Therefore, quantifying effect on is a critical step eliminate its interference in detection. Due nonuniform and time-dependent characteristics distribution, it insufficient obtain reliable relationships between temperatures using air or at surface. In this paper, correlations measured (air temperature, surface mean etc.) for slab beam are comparatively analyzed. And quantitative models constructed considering distribution. Firstly, reinforced concrete were placed outside laboratory monitored. Secondly, correlation coefficients three kinds calculated, respectively. Thirdly, simple linear regression established beam. Finally, five variables selected construct multiple models. Prediction results reveal that proposed possess favorable accuracy quantify