【摘要】：針對混凝土結(jié)構(gòu)在太陽輻射和氣溫變化等環(huán)境因素的影響下容易產(chǎn)生不均勻溫度分布,從而引起結(jié)構(gòu)靜動力性能變化的問題,設(shè)計、制作了混凝土板溫度效應(yīng)實驗?zāi)Ｐ?安裝多個溫度傳感器測試結(jié)構(gòu)的溫度梯度和環(huán)境溫度,并測量了一整天的溫度變化狀況及結(jié)構(gòu)的動力特性.基于模態(tài)測試理論開發(fā)了模態(tài)識別程序包,以識別結(jié)構(gòu)的頻率、振型和阻尼比等動力特性參數(shù).實驗結(jié)果表明,溫度對結(jié)構(gòu)的自振頻率造成了一定的影響,結(jié)構(gòu)溫度升高1℃時引起的第1階和第2階頻率分別減小0.074和0.228 Hz.
[Abstract]:In order to solve the problem that concrete structure is prone to produce uneven temperature distribution under the influence of environmental factors such as solar radiation and temperature change, the experimental model of temperature effect of concrete slab is designed and made, which leads to the change of static and dynamic performance of concrete structure. Several temperature sensors were installed to test the temperature gradient and ambient temperature of the structure, and the temperature variation and the dynamic characteristics of the structure were measured throughout the day. Based on the modal testing theory, a modal identification package is developed to identify the dynamic parameters of the structure, such as frequency, mode shape and damping ratio. The experimental results show that the temperature has a certain effect on the natural frequency of the structure. The first and second order frequencies of the structure are reduced by 0.074 and 0.228 Hz. respectively when the temperature rises at 1 鈩，

本文編號：2388248