Temporal Characteristics of Velocity/Acceleration Pulses and Seismic Damage of Structures

该奖项关注开发一种新技术，以研究近场地震地面运动的潜在破坏性特征及其对建筑结构的影响。 通过使用移动参考坐标系，运动（加速度、速度和位移）轨迹可以被分解成运动学上分离的参数，这些参数表示组合动态力的不同效果。 这种方法是有用的，以探测由近场地面运动与突出的速度或加速度脉冲的现象，已被观察到的各种类型的近场结构损伤的原因所造成的各种类型的结构损伤。 本研究主要包括三个方面的工作：（1）。分析和提取近期大震地震动的损伤参数;开发新的传感系统测量损伤参数;（3）。将识别的关键损伤参数整合到结构需求和能力模型中，以供潜在的地震工程应用

This award is concerned about developing a new technology to study potentially damaging characteristics of near-field seismic ground motions and their impacts to building structures. By using a moving reference coordinate system, the motion (acceleration, velocity and displacement) trajectories can be decomposed into kinetically separated parameters that represent different effects of the combined dynamic forces. This approach is useful to probe the various types of structural damages caused by a near-field ground motion with prominent velocity or acceleration pulses-a phenomenon that has been observed as the cause of various types of near-field structural damages. The research will consist of three major tasks: (1). Analyze and extract damage parameters from recent major earthquake ground motions; (2). Develop a new sensing system to measure the damage parameters; (3). Integrate the identified key damage parameters into structural demand and capacity models for potential earthquake engineering application