Approximating peak responses in seismically Isolated buildings using generalized modal analvsis
Approximating peak responses in seismically Isolated buildings using generalized modal analvsis
复制标题
使用广义模态分析来近似隔震建筑物中的峰值响应
DOI：
10.1002/eqe.2299
复制
发表时间：
2013
影响因子：
4.5
通讯作者：
Tracy Becker and Stephen Mahin
中科院分区：
文献类型：
--
作者：
KANG Larf;GE Hanbin;HADA Shinki;Tracy Becker and Stephen Mahin;Tracy Becker and Stephen Mahin
虽然能够准确地模拟非线性隔震支座的详细行为和这种非线性对隔震建筑物动力响应的影响是可取的，但在初始设计阶段，当选择支座性能时，这种详细的分析是不可行的。然而，如果能够在设计的早期阶段准确地估计关键工程需求参数，以了解隔震结构的动态响应特性，并平衡和优化支座和结构特性，以实现为建筑物设定的性能目标，这将是非常有益的。不幸的是，经典的模态反应谱分析方法不能提供准确的结果，大的，非经典阻尼的问题，是孤立的建筑物的特点。为了找到一种方法，即使在大的非经典阻尼的峰值建筑物的反应，广义模态反应谱分析实现。研究了不同高度的建筑物在线性粘性、三重摩擦摆和单重摩擦摆隔震系统中的反应。广义模态反应谱分析方法被发现给所有系统的预测显着优于经典方法相比。当有效阻尼增加时，无论是常规的还是经典的模态反应谱分析，都不能很好地预测单摩擦摆隔震体系刚度突变时的隔震性能。版权所有© 2013约翰威利父子有限公司.
Although the ability to simulate accurately the detailed behavior of nonlinear isolation bearings and the effects of this nonlinearity on dynamic response of the isolated building is desirable, such detailed analyses are not feasible during initial design stages when bearing properties are being selected. However, it would be very beneficial to be able to estimate accurately key engineering demand parameters at the early stages of design to understand the dynamic response characteristics of the isolated structure and to balance and optimize the bearing and structural characteristics to achieve the performance goals set for the building. Unfortunately, classical modal response spectrum analysis methods do not provide accurate results for problems with large, nonclassical damping, as is characteristic of isolated buildings. To find a method capable of predicting peak building responses even with large nonclassical damping, generalized modal response spectrum analysis is implemented. The responses of several buildings having different heights and isolated by linear viscous as well as triple friction pendulum and single friction pendulum isolation systems are investigated. Generalized modal response spectrum analysis methods were found to give significantly better predictions for all systems compared with classical methods. The behavior of buildings isolated with single friction pendulum systems exhibiting sudden changes in stiffness could not be well predicted by either general or classical modal response spectrum analysis when effective damping was increased. Copyright © 2013 John Wiley & Sons, Ltd.