首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Collapse assessment of moment frame buildings, considering vertical ground shaking
【24h】

Collapse assessment of moment frame buildings, considering vertical ground shaking

机译:考虑垂直地面震动的弯矩框架建筑物倒塌评估

获取原文
获取原文并翻译 | 示例

摘要

While many cases of structural damage in past earthquakes have been attributed to strong vertical ground shaking, our understanding of vertical seismic load effects and their influence on collapse mechanisms of buildings is limited. This study quantifies ground motion parameters that are capable of predicting trends in building collapse because of vertical shaking, identifies the types of buildings that are most likely affected by strong vertical ground motions, and investigates the relationship between element level responses and structural collapse under multi-directional shaking. To do so, two sets of incremental dynamic analyses (IDA) are run on five nonlinear building models of varying height, geometry, and design era. The first IDA is run using the horizontal component alone; the second IDA applies the vertical and horizontal motions simultaneously. When ground motion parameters are considered independently, acceleration-based measures of the vertical shaking best predict trends in building collapse associated with vertical shaking. When multiple parameters are considered, Housner intensity (SI), computed as a ratio between vertical and horizontal components of a record (SIV/SIH), predicts the significance of vertical shaking for collapse. The building with extensive structural cantilevered members is the most influenced by vertical ground shaking, but all frame structures (with either flexural and shear critical columns) are impacted. In addition, the load effect from vertical ground motions is found to be significantly larger than the nominal value used in US building design. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译:尽管在过去的地震中许多结构损坏的案例都归因于强烈的垂直地面震动,但我们对垂直地震荷载作用及其对建筑物倒塌机制的影响的理解仍然有限。这项研究量化了能够预测建筑物因垂直震动而倒塌趋势的地震动参数,确定了最有可能受到强烈的垂直地面震动影响的建筑物的类型,并研究了多级地震作用下元素水平响应与结构倒塌之间的关系。定向摇动。为此,在五个具有不同高度,几何形状和设计时代的非线性建筑模型上运行了两组增量动态分析(IDA)。第一个IDA仅使用水平组件运行;第二个IDA同时应用垂直和水平运动。当独立考虑地面运动参数时,垂直震动的基于加速度的度量可以最好地预测与垂直震动相关的建筑物倒塌的趋势。当考虑多个参数时,以记录的垂直分量和水平分量之间的比率(SIV / SIH)计算的Housner强度(SI)可以预测垂直震动对于坍塌的重要性。具有悬臂结构的建筑物受到竖向地面震动的影响最大,但是所有框架结构(具有抗弯和抗剪临界柱)都会受到影响。另外,发现垂直地面运动产生的载荷效应明显大于美国建筑设计中使用的标称值。版权所有(c)2016 John Wiley&Sons,Ltd.

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