In this thesis , the experimental research of the behavior of high strength concrete axial compression columns and eccentric compression columns under non - uniform temperature field are conducted . from the experimental analysis , the variational regularity of ultimate load capacity and deformation of high strength concrete compression - flexure members under non - uniform temperature field is obtained . the influences of different factors including temperature , stirrup contents , strength grade of concrete , pre - loading level , eccentricity and different loading - temperature paths to refractory capability of members are investigated 文中還對高強混凝土軸心受壓柱和偏心受壓柱在不均勻溫度場下的力學(xué)性能進行了試驗研究,通過試驗分析了高強混凝土壓彎構(gòu)件極限承載力和變形在不均勻溫度場下的變化規(guī)律,考察了不同升溫溫度、箍筋用量、混凝土強度等級、預(yù)加荷載水平、荷載偏心以及荷載?溫度途徑等對構(gòu)件耐火性能的影響,通過試驗量測,得到了構(gòu)件的截面溫度場。
The assumption about deformation character and constitutional relationship of high strength concrete and reinforcement under elevated temperature is proposed making use of the general regularity of high strength concrete compression - flexure member . the ultimate load capacity and deformation of high strength concrete compression - flexure members under elevated temperature are analyzed by means of full - range and non - linear analysis method . the computing results and test data are in good agreement 根據(jù)高溫時高強混凝土壓彎構(gòu)件的一般規(guī)律,給出了高溫時高強混凝土和鋼筋變形特征的假設(shè)和本構(gòu)關(guān)系,利用全過程非線性分析方法分析了高溫時高強混凝土壓彎構(gòu)件的極限承載力和變形,計算結(jié)果與試驗結(jié)果吻合較好。
Neglecting the influence of concrete stress - path , relative program is presented to make full - process analysis on compression - flexure members confined with cfrp in the compression zone , a key research is to analyze the effect of some parameters including axial compression ratio , thickness of cfrp , concrete strength on strength capacity and displacement ductility of reinforced compression - flexure members 在忽略混凝土應(yīng)力路徑的影響下,編制相應(yīng)程序?qū)μ祭w維布粘貼鋼筋混凝土壓彎構(gòu)件進行了全過程分析及相關(guān)參數(shù)研究,并把計算結(jié)果與試驗結(jié)果進行了對比,兩者吻合較好。