【摘要】 为研究传统抗震结构设置黏弹性阻尼器对巨震作用的抗倒塌性能，采用增量动力分析（incremental dynamic analysis,IDA）方法，针对II类场地23条具有代表性的巨震波作用对结构楼层位移、能量耗散、结构倒塌的易损性曲线及结构塑性铰分布等分别进行动力弹塑性分析。工程算例分析表明：巨震作用下，设置黏弹性阻尼器的减震结构楼层最大位移和层间最大位移角均明显减小，其倒塌概率远低于相应传统抗震结构相应值，而抗倒塌安全储备系数明显高于相应抗震结构相应值；另外，减震结构塑性铰远未达到承载力丧失的程度，而抗震结构的塑性铰处于承载能力即将失效状态。由此表明，巨震作用下，黏弹性阻尼器减震结构相较于传统抗震结构能有效耗散地震能量，改善框架结构的屈服机制，增大结构抗倒塌安全储备，因而能显著提高结构抗倒塌性能。更多还原

【Abstract】 The collapse resistance of frame structure with viscoelastic dampers is studied. For the frame structure subjected from 23 representative mega earthquake waves in the class II site, the incremental dynamic analysis method is used for dynamic elastoplastic study of the floor displacement, energy dissipation, collapse vulnerability curve and distribution of structural plastic hinge. The analysis of engineering example shows that the floor displacement and the story layer angle of the damping structure with viscoelastic dampers are obviously reduced under the mega earthquake, the collapse probability is much lower than the corresponding value of the traditional frame structure without viscoelastic damper, but the safety reserve coefficient of collapse resistance is obviously higher than the corresponding value of the traditional structure. In addition, the plastic hinges of the damping structure are far from bearing capacity loss, but the plastic hinges of the traditional frame structure are in the state of bearing capacity failure. From this, the viscoelastic damper structure can effectively dissipate the seismic energy, improve the yield mechanism of the frame structure, and increase the structural collapse resistance safety reserve, so the viscoelastic dampers can significantly improve the collapse resistance performance of the structure.更多还原