【摘要】 将隔震支座与防屈曲支撑应用于三心圆立体钢管拱桁架体系,以开展其集成减震与隔震效应研究。通过利用SAP 2000软件和几何与材料双重非线性的集中塑性铰理论,开展其在地震波作用下的动力弹塑性性能分析,分别获得原结构和减震与隔震结构的塑性铰分布、整体变形、失效形态及结构延性系数,比较并评定了原结构和减震与隔震结构的失效类型、极限承载力和变形能力。结果表明,减震与隔震结构自振周期得到延长,失效界限地震波加速度峰值相比原结构提高了131.2%,抗震性能显著提高;原结构和减震与隔震结构的失效破坏类型均为弹塑性动力失稳破坏,地震波作用下两种结构在失效界限时出现的塑性铰杆件数量均较少,但分布比较均匀;两种结构模型在两个主要受力方向均具有一定的延性性能,但其失效前的绝对变形较小,破坏前预兆性不显著。更多还原

【Abstract】 This article presents an investigation on the earthquake damping effect by applying isolation bearing and buckling restrained brace to the steel tube arch truss system. By using SAP 2000 software and based on concentrated plastic hinge theory including geometric and material nonlinearity,many dynamic increment analyses of both original and damping structure systems were carried out under earthquake waves. Their dynamic performance including plastic hinge distribution,deformation,failure form and structure ductility coefficient obtained. Their dynamic performances were evaluated and compared. The results showed that the self-vibration period of the damping structure was extended; the critical failure limitation capability of damping structure was 131. 2% higher than the original structure,and its seismic performance was improved significantly; The failure types of both original structure and damping structure were elastic-plastic dynamic buckling; the quantity of plastic hinges for them were less before their failure,and their distributions of plastic hinges were uniform; They all had some ductility,their absolute deformation was small before failure,and their failure sign was not significant.更多还原