Method for estimating horizontal dynamic displacement of high-rise structure and monitoring system thereof
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A high-level structure and monitoring system technology, applied in measurement devices, instruments, optical devices, etc., can solve the problems of short measurement distance, inability to guarantee real-time monitoring of structural changes, manual readings, etc.
Active Publication Date: 2020-06-30
HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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[0003] The existing horizontal dynamic displacement monitoring technology of high-rise structures mainly adopts the secondary integration method of the acceleration sensor, GPS system measurement, total station measurement, etc., but the above-mentioned measurement methods have defects in the measurement. The horizontal acceleration of the floor can be used to obtain the horizontal dynamic displacement of the structure, but the accuracy is low; the GPS system is susceptible to electromagnetic interference, and cannot guarantee real-time monitoring of changes in the horizontal dynamic displacement of the structure under bad weather conditions; the measurement accuracy of the total station is relatively high , but generally requires manual readings, there are human errors, and the measurement distance is short, it is impossible to perform real-time and simultaneous measurement of multiple points, and it is also impossible to perform long-term continuous measurement in extreme weather
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Embodiment 1
[0043] With the development of society, the structural system of super high-rise buildings is gradually becoming more complex. A large number of super high-rise buildings adopt the structural system of "frame-core tube-outrigger truss". moving displacement. Super high-rise structures are more sensitive to horizontal loads such as wind loads, which may cause excessive deformation of the structure, resulting in comfort and safety issues. Therefore, monitoring and controlling the horizontal dynamic displacement of the structure under wind load is one of the key issues in the health monitoring of super high-rise structures. Real-time monitoring of horizontal dynamic displacement of super high-rise structures under different wind loads plays a key role in structural safety assessment and vibration control.
[0044] The existing horizontal dynamic displacement monitoring technologies of high-rise structures mainly include the following types: acceleration sensor secondary integrat...
Embodiment 2
[0136] This embodiment provides a monitoring system for the horizontal dynamic displacement of a high-rise structure, including a measurement module for measuring the horizontal dynamic displacement u at point x of the structure d and the inclination angle u at point x of the structure θ ; The data processing module is used to establish the horizontal dynamic displacement curve function u with the change of time t d (x, t) and inclination curve function u θ (x, t); retain the horizontal displacement u by bandpass filtering d (x, t) and inclination u θ The first-order modal contribution u of (x,t) d1 (x,t) and u θ1 (x,t), the horizontal displacement u in the curve fitting first-order mode d1 (x,t) and inclination u θ1 (x, t) to get the linear coefficient β, according to the linear coefficient β, calculate the horizontal displacement u at the point x of the structure that changes with time t dS1 (x,t), satisfy: u d1 (x,t)=β×u θ1 (x, t); the master controller is electric...
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Abstract
The invention provides a method for estimating horizontal dynamic displacement of a high-rise structure and a monitoring system thereof. The invention belongs to the technical field of structural horizontal displacement monitoring. The method comprises the following steps: under normal wind load in a good environment, synchronously measuring the horizontal dynamic displacement ud (x, t) and an inclination angle utheta (x, t) changing along with time t at the x point of the structure for multiple times within a period of time t, wherein first-order modal contribution plays a dominant role in the horizontal displacement of the structure under the action of wind load, and obtaining the horizontal dynamic displacement ud1 (x, t) and the inclination angle utheta 1 (x, t) under the first-order modal respectively, wherein ud1 (x, t) = beta * utheta 1 (x, t) is met; performing curve fitting on the horizontal dynamic displacement ud1 (x, t) and the inclination angle utheta1 (x, t) to obtain a linear coefficient beta; under other wind loads, especially extreme wind loads, only measuring the inclination angle u theta S (x, t), changing along with time t, of the x point of the structure actually; reserving a first-order modal contribution signal u theta S1 (x, t); obtaining the real-time horizontal dynamic displacement udS1 (x, t) changing along with time t at the x point of the structure,and approximately estimating the real horizontal dynamic displacement udS (x, t) of the structure, so real-time dynamic monitoring is achieved, calculation is convenient, precision is high, interference of environmental factors such as weather and noise is avoided, and the accuracy of the monitoring structure is improved.
Description
technical field [0001] The invention relates to the technical field of structural horizontal dynamic displacement monitoring, in particular to a method for estimating the horizontal dynamic displacement of high-rise structures and a monitoring system thereof. Background technique [0002] With the progress of society, a large number of super high-rise buildings with novel structures and complex shapes are constantly emerging. In order to ensure the safe and reliable operation of the structure, certain methods should be adopted to monitor and control the internal force changes and deformation of the structure. Dynamic displacement is an important indicator reflecting structural performance and safety. Whether it is structural construction control or structural health monitoring, displacement is the basic monitoring content. [0003] The existing horizontal dynamic displacement monitoring technology of high-rise structures mainly adopts the secondary integration method of the ...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 胡卫华刘明月滕军韩晓辉
Owner HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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