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首页> 外文会议>Third International Conference on Earthquake Resistant Engineering Structures ERES Ⅲ, 3rd, Sep, 2001, Malaga >Seismic response of buildings with setback
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Seismic response of buildings with setback

机译：受挫建筑物的地震反应

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摘要

The behavior of multistory buildings during earthquake motions depends on the distribution of mass, stiffness, and strength in both the horizontal and vertical planes of the building. Building codes distinguish between regular and setback buildings for earthquake resistant design. Equivalent lateral force (ELF) procedure may be used to determine the design forces in regular buildings, while linear dynamic analysis is required for setback structures. Due to the sudden change in stiffness at the setback the load distribution is often complex in the neighborhood of the setback level. The load distribution among the elements can be determined by means of a three-dimensional program. However, such an approach is often not suitable in the preliminary design stage and it is preferable to have a simple calculation procedure to estimate the fundamental period and lateral load distribution on the different elements at this stage. In this study, the earthquake response of setback buildings with mass irregularity over their height is evaluated. It is concluded that if the shift in period associated with variation in mass is accounted for, it is possible to determine the fundamental period reliably using ELF approach. It is also found that the relative increase in main period could be reasonably well presented by a simple formula.
机译：多层建筑物在地震运动中的行为取决于建筑物在水平和垂直方向上的质量，刚度和强度的分布。建筑法规区分常规建筑和挫折建筑以进行抗震设计。等效横向力（ELF）程序可用于确定常规建筑物中的设计力，而后退结构需要进行线性动力分析。由于挫折处刚度的突然变化，在挫折水平附近，载荷分布通常很复杂。元件之间的载荷分布可以通过三维程序确定。但是，这种方法通常不适用于初步设计阶段，因此，最好具有简单的计算程序来估算该阶段在不同元件上的基本周期和侧向载荷分布。在这项研究中，评估了在其高度上具有质量不规则性的后退建筑物的地震反应。结论是，如果考虑到与质量变化有关的周期变化，则可以使用ELF方法可靠地确定基本周期。还发现，用一个简单的公式可以很好地说明主要时期的相对增长。

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