低屈服点钢剪切耗能板抗震性能试验

鉴于目前对国产低屈服点钢材生产剪切板阻尼器的研究和应用还没有系统开展,采用宝山钢铁股份有限公司自主研发生产的低屈服点钢LYP160,设计制作了3种不同尺寸的剪切板阻尼器,开展其低周往复循环荷载试验,并在试验基础上,对影响剪切板耗能性能的因素进行了分析.研究结果表明:由国产LYP160制成的剪切耗能板在低周反复荷载作用下,滞洄曲线饱满,具有良好的耗能性能;经过合理设计和施工,该剪切板可以作为消能阻尼器应用于实际工程

EXPERIMENTAL STUDY ON THE TIME-DEPENDENTBEHAVIOR of SHORT STEEL-REINFORCED CONCRETE COLUMNS UNDER SUSTAINED AXIAL LOADING

钢骨混凝土柱结构在过去几十年间已得到广泛的运用。但是目前关于这种柱结构在长期荷载作用下由于徐变和收缩引起的与时间相关的力学性能研究还开展得很少。该文开展了钢骨混凝土短柱的长期轴向荷载试验研究,还进行了这些柱的极限承载力破坏试验。试验监测了由徐变和收缩引起的柱的轴向长期变形。基于该实测曲线的分析表明,采用ACI 209r-92的收缩模型和CEb-fIP90的徐变模型,利用龄期调整有效模量法可以较好地模拟钢骨混凝土柱在长期轴向荷载作用下的变形发展。经历了长期加载后的试验柱的极限承载力破坏试验还表明,长期轴向荷载对柱的轴压承载力没有显著影响。Steel-reinforced concrete(SRC) columns have been widely used over the past few decades.However, very limited research has been conducted on the time-dependent behavior of these columns caused by creep and shrinkage under sustained loadings.This paper provides an experimental study on the long-term behavior of short SRC columns under sustained axial loadings and their ultimate axial bearing capacity.Long-term axial deformation due to shrinkage and creep of the concrete were recorded.Based on test results, time-dependent analysis of the SRC columns under sustained axial loadings using the age-adjusted effective modulus method was proved to be effective by employing the ACI 209R-92 model for the prediction of shrinkage and the CEB-FIP90 model for creep.The ultimate strength of the columns after long-term loading was also determined and results showed that the axial sustained load had no significant effect upon the axial compressive strength of SRC columns.国家自然科学基金项目(50908197); 福建省自然科学基金项目(2009J05135

Study on Hysteretic Behavior of Shear Panel Damper Made of Low Yield Point Steel BLY160

低屈服点钢具有屈服点低、塑性好的特点。由低屈服点钢制成剪切板，剪切变形模式可以在小面积下消耗大量能量，且便于制作及安装替换。低屈服点钢剪切板在地震中将先于主体结构进入塑性消耗能量，达到减震的目的，因此，由低屈服点钢制成的剪切消能板阻尼器具有优良的耗能性能及很好的经济性，应用前景广阔。目前国内低屈服点钢剪切消能板相关技术尚不够成熟并缺乏相应的工程应用，开展相关的理论和试验研究工作具有重要的意义。 本文采用宝山钢铁股份有限公司自主研发生产的低屈服点钢BLY160，开展了BLY160剪切消能板的低周往复循环加载试验研究。主要工作内容如下： 1、对低屈服点钢BLY160及普通钢Q345B进行了准静...Low yield point steel BLY160 have the characteristics of low yield point and good plasticity. Dampers made by low yield point steel can dissipate lots of energy by shear deformation with small area, and easy to be manufactured, installed and replaced. In addition, shear panel damper made of low yield point steel can enter plastic stage to dissipate energy prior to other components of main structur...学位：工程硕士院系专业：建筑与土木工程学院_工程硕士(建筑与土木工程)学号：2532013115180