...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Base-isolation systems for the seismic retrofitting of r.c. framed buildings with soft-storey subjected to near-fault earthquakes
【24h】

Base-isolation systems for the seismic retrofitting of r.c. framed buildings with soft-storey subjected to near-fault earthquakes

机译：用于地震改装的基础隔离系统。 框架建筑与靠近故障地震的软店

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

More studies are needed to evaluate the effectiveness of the base-isolation in seismic retrofitting of reinforced concrete (r.c.) framed structures in the case of masonry infills (MIs) not uniformly distributed in elevation. Moreover, amplification of the inelastic demand is generally expected for base-isolated structures located in a near-fault area, in the event of long-duration velocity pulses. In order to understand the nonlinear seismic behaviour of masonry-infilled base-isolated r.c. framed structures, first a six-storey r.c. framed building is primarily designed (as fixed-base) in compliance with a former Italian seismic code, for a medium-risk zone. Then it is retrofitted by the insertion of a base-isolation system with elastomeric and sliding bearings to meet the requirements of the current Italian code, in a high-risk seismic zone. Failure mechanisms of totally and partly infilled structures are compared by considering three structural models: (i) bare structure with nonstructural MIs; (ii) infilled structure with in-elevation uniform distribution of structural MIs; (iii) infilled structure with in elevation uneven distribution of structural MIs. Nonlinear dynamic analysis of the original (fixed-base) and retrofitted (base-isolated) structures is carried out by a lumped plasticity model describing the inelastic behaviour of the r.c. frame members, while nonlinear force-displacement laws are considered for the elastomeric and sliding bearings. A pivot hysteretic model is assumed to predict the nonlinear force-displacement law of the equivalent diagonal strut adopted for modelling the MIs. Finally, near-fault ground motions with significant horizontal pulses are selected and scaled on the basis of the design hypotheses adopted for the test structures.
机译：需要更多的研究来评估钢筋混凝土（R.C.）框架结构的抗震混凝土（R.C.）框架结构中的底座隔离的有效性。此外，在长持续时间速度脉冲的情况下，通常预期位于近断层区域的基部隔离结构的弹性需求的放大。为了了解砌体 - infilled碱基分离的非线性地震行为。框架结构，首先是六层r.c。框架大楼主要设计（作为固定基地），符合前意大利地震代码，用于中等风险区域。然后，通过插入具有弹性和滑动轴承的碱隔离系统来改造，以满足当前意大利代码的要求，高风险地震区。通过考虑三种结构模型来比较完全和部分缺陷结构的失效机制：（i）具有非结构MIS的裸结构; （ii）具有升高的结构均匀的结构MIS分布的结构; （iii）填充结构，具有高度的结构MIS分布不均匀。原始（固定底座）和改装（基序）结构的非线性动力分析由描述R.C的无弹性行为的集总塑性模型进行。框架构件，而非线性力 - 位移定律被认为是弹性体和滑动轴承。假设枢轴滞后模型预测用于建模MIS的等效对角线支柱的非线性力 - 位移规律。最后，根据用于测试结构采用的设计假设，选择和缩放具有显着水平脉冲的接近故障接地运动。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号