Measurement of wind-induced response of buildings using RTK-GPS
Measurement of wind-induced response of buildings using RTK-GPS
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DOI：
10.1016/s0167-6105(02)00287-8
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发表时间：
2002-12-01
影响因子：
4.8
通讯作者：
Yoshida, A
中科院分区：
文献类型：
--
作者：
Tamura, Y;Matsui, M;Yoshida, A
加速度计已被用于建筑物风致响应的现场测量。然而，风致响应由静态分量（即平均值）和动态波动分量组成。静态分量很难用加速度计测量。RTK-GPS（Leica MC 1000）的标称精度为+/- 1 cm + 1 ppm（水平位移）和+/-2 cm +2 ppm（垂直位移），采样率为10 Hz。为了验证RTK-GPS在风振响应测量中的可行性及其在实尺寸塔架位移测量中的有效性，首次采用电子激振器对RTK-GPS测量正弦位移的精度进行了试验研究。当振动频率小于2 Hz，振幅大于2cm时，RTK-GPS测量结果与实际位移接近，并通过对一实际钢塔的足尺测量验证了RTK-GPS的有效性。通过对RTK-GPS用于建筑物风振响应测量的可行性研究，RTK-GPS可以测量振幅大于2 cm、自振频率小于2 Hz的风振响应。(C)2002爱思唯尔科技有限公司版权所有。
Accelerometers have been used for field measurements of wind-induced responses of buildings. However, wind-induced response consists of a static component, i.e. a mean value, and a dynamic fluctuating component. The static component is difficult to measure by accelerometers. An RTK-GPS (Leica MC1000) has a nominal accuracy of +/- 1 cm + 1 ppm for horizontal displacements and +/- 2cm + 2ppm for vertical displacements with a sampling rate of 10 Hz. This study aims to demonstrate the feasibility of RTK-GPS for wind-induced response measurements and its efficiency in measuring the displacement of a full-scale tower.As the first experiment, the accuracy of Real-Time Kinematic-Global Positioning System (RTK-GPS) in measuring sinusoidal displacements was examined, using an electronic exciter. When the vibration frequency was lower than 2 Hz and the vibration amplitude was larger than 2cm, RTK-GPS results seemed to closely follow the actual displacement.The efficiency of RTK-GPS was then demonstrated in the full-scale measurement of an actual steel tower. Based on the feasibility study of RTK-GPS for measuring wind-induced responses of buildings, the responses with amplitudes larger than 2 cm and natural frequencies lower than 2 Hz can be detected by RTK-GPS. (C) 2002 Elsevier Science Ltd. All rights reserved.