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首页> 外文会议>Asia-Pacific Conference on Shock amp; Impact Loads on Structures; 20031112-14; Changsha, Hunan,(CN) >STUDY OF PLAN IRREGULARITY EFFECTS ON SEISMIC VULNERABILITY OF MOMENT RESISTING FRAMED STRUCTURES
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STUDY OF PLAN IRREGULARITY EFFECTS ON SEISMIC VULNERABILITY OF MOMENT RESISTING FRAMED STRUCTURES

机译：计划的不规则性对抗弯框架结构地震易损性的影响研究

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摘要

Basic intend of seismic provision in the design codes has been to provide building with an ability to withstand intense ground shaking without collapse. In order to accomplish this, one of the basic principles inherent in modern codal provisions is to use regular structural system. In reality, it is very difficult to predict with certainty how much damage building will experience for a given level of ground motion because there are many factors that affect the behavior of the structural systems such as stiffness of non-structural elements, strength of individual building components, quality of construction etc. These factors cannot be precisely defined and also the analysis procedures used to predict building response are not completely accurate. Therefore, in this study, the effects of plan irregularities (re-entrant corner type) of moment resistant framed structures on its seismic vulnerability are investigated by analyzing mathematical models of RC framed structures with different re-entrant comer ratio (A/L) for various shapes viz.-a-viz. square shaped, rectangular shaped, L-shaped, T-shaped, and star shaped four storey buildings. Design tables are prepared based on the numerical results obtained which can serve as a ready reckoner for design engineers to interpolate the corresponding base shear values due to the effect of re-entrant corners in comparison with that of regular buildings. It is seen from the results that though the total base shear is decreasing with the increase in A/L ratio, the effective base shear per column along the irregular direction is increased for all values of A/L ranging from 0.15 to 0.2. Also the base shear computations for various soil conditions and based on various international codal provisions are presented in a broad sphere to highlight the effect of re-entrant corner ratio (A/L) on the seismic vulnerability of four storey buildings.
机译：设计规范中提供地震的基本目的是使建筑物能够承受剧烈的地面震动而不会倒塌。为了实现这一目标，现代规范条款固有的基本原则之一是使用规则的结构系统。实际上，要确定给定的地面运动水平，建筑物很难承受多少破坏是非常困难的，因为有许多因素会影响结构系统的性能，例如非结构性元素的刚度，建筑物的强度这些因素无法精确定义，并且用于预测建筑物响应的分析程序也不是完全准确的。因此，在本研究中，通过分析具有不同凹角比（A / L）的RC框架结构的数学模型，研究了抗弯框架结构的平面不平整度（凹角类型）对其抗震性的影响。各种形状。方形，矩形，L形，T形和星形四层建筑。根据获得的数值结果准备设计表，这些数据表可以作为设计工程师的现成推算工具，以便与常规建筑物相比，由于折角的影响，可以插入相应的基础剪力值。从结果可以看出，尽管总基础剪切力随着A / L比的增加而减小，但对于所有A / L值（从0.15到0.2），沿着不规则方向的每列有效基础剪切力都增加了。此外，在广泛的领域中介绍了各种土壤条件和基于各种国际规范的基础剪力计算，以强调折返角比（A / L）对四层建筑地震易损性的影响。

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