【摘 要】
：
为研究钢管混凝土柱-钢梁错层节点的抗震性能,按1∶3的缩尺比例设计并制作了8个钢管混凝土柱-钢梁错层节点试件,进行了低周往复荷载下的破坏试验.研究了轴压比、钢梁错开高度及剪压比对钢管混凝土柱-钢梁错层节点抗震性能的影响.通过对试件的滞回曲线、骨架曲线、刚度退化、承载力退化及延性、耗能能力等参数分析可知:轴压比的提高与剪压比的减小可以使钢管混凝土柱-钢梁错层节点获得更好的延性及耗能性能,轴压比提高0.2,试件延性系数μ与等效粘滞阻尼系数he分别提升5.3％与40％,剪压比减小33.5％,试件延性系数μ及等效
【机 构】
：
武汉科技大学城市建设学院,湖北武汉430063
论文部分内容阅读
为研究钢管混凝土柱-钢梁错层节点的抗震性能,按1∶3的缩尺比例设计并制作了8个钢管混凝土柱-钢梁错层节点试件,进行了低周往复荷载下的破坏试验.研究了轴压比、钢梁错开高度及剪压比对钢管混凝土柱-钢梁错层节点抗震性能的影响.通过对试件的滞回曲线、骨架曲线、刚度退化、承载力退化及延性、耗能能力等参数分析可知:轴压比的提高与剪压比的减小可以使钢管混凝土柱-钢梁错层节点获得更好的延性及耗能性能,轴压比提高0.2,试件延性系数μ与等效粘滞阻尼系数he分别提升5.3％与40％,剪压比减小33.5％,试件延性系数μ及等效粘滞系数he分别提升6.5％与39.5％;随着钢梁错开高度的增加,试件极限承载力呈现先增加后降低的趋势,钢梁错开高度达到一个梁高以后,受节点中部短柱影响,错层节点刚度增加,破坏趋向于边节点.
其他文献
A facile modification strategy is developed to promote the proliferation and osteogenic differentiation of rat bone marrow stromal cells (rBMSCs) through deposition of a bioactive calcium silicate (CS) coating on the porous surface of poly (ether-ether-ke
Rolling process based on the plastic deformation as a surface strengthening treatment was employed, aiming to improve the wear resistance ability and functional performance of the high carbon equivalent gray cast iron (HCEGCI). The microstructures and tri
The feasibility of applying the grain boundary character distribution (GBCD) optimization to Inconel 625 for improving the intergranular corrosion (IGC) resistance was studied. The GBCD was obtained and characterized by electron backscatter diffraction (E
The solidification microstructures of undercooled Ni90Cu10 alloys under different undercoolings were studied systematically by means of melt coating and cyclic superheating. In the obtained undercooling range, the solidification structures of the two unde
To synthesize three different grafting ratios of gallic acid (GA)-chitosan (CS) copolymer by a free radical mediated grafting method, which is further applied to the field of antibacterial materials, crosslinking structures of the compound GA-CS copolymer
本文针对金沙江上游某库区滑坡,从滑坡稳定性、滑坡运动规律和滑坡诱发涌浪灾害3个方面评估了滑坡的整体和局部稳定性,模拟了滑坡启动后的动力学过程,探讨了滑坡入水产生的涌浪对大坝的影响.滑坡在天然水位工况下基本稳定,在正常蓄水位工况下失稳滑动的可能性大,进一步建立了水库蓄水后滑坡的2种失稳模式:Ⅱ区整体滑动和Ⅱ区中下部滑动.在稳定性分析的基础上,采用潘家铮滑速计算方法,定量计算了滑坡从启动到停止的全过程,获得了各工况失稳滑动的滑速时程曲线和滑坡堆积形态.最后采用经验公式,对滑坡涌浪进行了预测.计算结果表明:水库
旱涝灾害是长江中游地区社会经济发展的瓶颈之一,旱涝灾害在近二三十年来发生了显著变化,但对其演变规律和成因还缺乏全面研究.以长江中游梅雨锋暴雨幕阜山地区典型流域隽水河为研究对象,基于标准化径流指数(standardized runoff index,SRI),利用趋势和变点检验、交叉小波变换、增强回归树机器学习(boosted regression tree,BRT)等方法探究典型流域旱涝与旱涝/涝旱急转演变规律及其驱动因子.研究发现:1)基于1、3、6、12个月4个时间尺度的SRI变化表明,1973-20
A compound, 3-ethyl-3-hydroxymethyloxetane (EHO), was synthesized with diethyl carbonate and trihydroxypropane as raw materials, 3-ethyl-3-allylmethoxy oxetane (EAMO) was synthesized with EHO and allyl bromide, and 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-
The effects of various general and heavy metal ions in acidic cadmium-containing wastewater on SBR desulfurization and cadmium removal under different concentrations were studied. CrO42-and S2- inhibited SRB mineralization, and Mg2+, Ca2+, Fe2+, and Fe3+
为了提高沥青及其混合料的性能,将2种废旧聚丙烯(white polypropylene,WPP;green polypropylene,GPP)分别与丁苯橡胶(styrene butadiene rubber,SBR)复配掺入基质沥青中,对改性沥青进行沥青常规性能试验和高温流变性能试验,并通过高温车辙试验、低温弯曲试验、浸水马歇尔试验以及冻融劈裂试验,与苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene butadiene styrene block copolymer,SBS)沥青混合料对比分析改性沥青混