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首页> 外文期刊>Bulletin of earthquake engineering >The influence of vibration duration on the structure of irregular RC buildings
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The influence of vibration duration on the structure of irregular RC buildings

机译：振动持续时间对不规则RC建筑物结构的影响

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摘要

In the twenty-first century, the seismic design of buildings seems to have become a fully recognised topic. There are guidelines and standards which should be taken into account by designers in seismic areas. Designers using modern international guidelines have ascertained that the behaviour of structures is not as expected. This may be the result of not taking into account the duration of the shock. The duration of surface vibrations could be one of the basic reasons why some buildings collapse or suffer severe damage to bearing systems as a result of long-duration earthquakes despite being properly designed in accordance with current understanding. Another primary reason for such collapse or damage is that some buildings in seismic areas have irregular structural systems that are sensitive to torsional vibrations. In this paper, a five-storey, irregular-shaped RC building model was subjected to different types of excitations: mining tremors, short-duration earthquakes, long-duration earthquakes. The first stage was a modal analysis based on in situ measurement. After model verification using in situ measurements, the building was then subjected to the three forms of excitation. Numerical studies were performed using a verified FEA model of the building in the time domain. The results of the calculations prove that the duration of the intensive phase of extortion is one of the reasons for the lack of building collapse in mining areas. In cases of mining shocks with a short duration of surface vibration, damage to buildings may occur which does not threaten the safety of their construction. Building collapses occur with earthquakes which are characterised by a much longer duration of the intensive phase of excitation compared to mining shocks. The results of in situ observations of RC structures that have survived a history of mining shocks of varied intensities confirm the results of numerical analyses.
机译：在二十一世纪，建筑物的地震设计似乎已成为一个充分认可的主题。有指导方针和标准应由地震区域的设计师考虑。使用现代国际指南的设计师已经确定了结构的行为并非预期。这可能是没有考虑到休克的持续时间的结果。表面振动的持续时间可能是由于根据目前的理解正确设计，因此在长期地震的情况下，一些建筑物折叠或对轴承系统遭受严重损害的基本原因之一。这种崩溃或损坏的另一个主要原因是地震区域的一些建筑具有不规则的结构系统，对扭转振动敏感。在本文中，对五层不规则形状的RC建筑模型进行了不同类型的激励：挖掘震颤，短持续的地震，长期地震。第一阶段是基于原位测量的模态分析。在使用原位测量的模型验证之后，将建筑物进行三种励磁形式。使用时域中的建筑物的验证的FEA模型进行数值研究。计算结果证明，勒索强化阶段的持续时间是矿区缺乏建筑物崩溃的原因之一。在较短的表面振动持续时间的采矿冲击的情况下，可能会出现对建筑物的损坏，这不会威胁其建筑的安全性。与采矿冲击相比，建筑物坍塌的特征在于，其特征在于，其特征在于，其特征在于，与采矿冲击相比，较长的激励阶段的持续时间更长。在不同强度采矿休克历史上的RC结构的原位观察结果证实了数值分析的结果。

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