Practical study on structural performance index considering human performance limit in buildings

我们一直关注室内人员在强地面运动中的反应和疏散行为。例如，疏散行动并不意味着躲避大楼，而是意味着躲在桌子下或关掉厨房炉子。我们之所以关注疏散行动，是因为建筑物内的人的安全比建筑物本身的安全更重要。这个概念可能会把我们带到结构性能可以代表的情况下，疏散行动容易。我们开发了绳索式长行程振动台，因为在近海发生大地震时，更重要的是要考虑长周期的地面运动。该工作台采用钢丝绳传动，与动力驱动器连接，理论上使其位移增加了6组滑块和13倍的驱动器变形。可以说，高频楼层反应给室内人员带来了强烈的焦虑。低频楼层反应对室内人员的影响与速度成正比，在1.0 S~3.3 S范围内与速度成正比，在超过3.3 S的较长周期内，与加速度成正比。通过动作捕捉系统的分析，得到了不稳定指数，其中一个指数(采用1.6%S的记录)与动作难度有很强的相关性。通过对基础隔震与隔震相结合的结构体系的分析研究，得到了基于性能化设计的较好的楼层反应。

We have paid attention with indoor human response and evacuation action in the strong ground motion. The evacuation action does not mean refuge from the building, but means hiding under the table or turning off the kitchen stove, for example. The reason why we paid attention with the evacuation action was that the safety of human inside the buildings was more important than the safety of the buildings itself. The concept might lead us to the situation that the structural performance could represent with the ease of evacuation action. We developed wire-driven long stroke shaking table, because long period ground motion is more important to consider with off shore huge earthquakes. This table is driven by wire connected with dynamic actuator and its displacement is increased by 6 sets of tackles and 13 times of actuator's deformation, theoretically. It could be said that high frequency floor response causes strong anxiety for indoor people. Low frequency floor response cause stagger for indoor people proportional with velocity in the range of 1.0 s to 3.3 s. For longer period than 3.3 s, it seems proportional with acceleration. After the analysis with motion capture system, the authors got unsteadiness indices and one of them (index using the record of 1.6 s) has very strong correlation with action difficulty. After the analytical study on structural system with connected vibration control and base isolation system, we got the preferable floor response for performance-based design.