A Method for Separating Temperature Effects and Long-Term Deflection of Bridge Deflection

A temperature effect, long-term deflection technology, applied in special data processing applications, instruments, geometric CAD, etc., can solve problems such as inaccurate data

Active Publication Date: 2019-06-25
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method relies heavily on human experience, resulting in inaccurate data

Method used

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  • A Method for Separating Temperature Effects and Long-Term Deflection of Bridge Deflection
  • A Method for Separating Temperature Effects and Long-Term Deflection of Bridge Deflection
  • A Method for Separating Temperature Effects and Long-Term Deflection of Bridge Deflection

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Embodiment 1

[0079] In order to illustrate the specific steps of a method for separating the temperature effect of bridge deflection and long-term deflection according to the present invention, this embodiment takes the extension bridge of Tanzhou Bridge in Foshan City, Guangdong Province as an example for specific description.

[0080] In order to obtain the real deflection signal of the bridge structure, continuous 48-hour on-site deflection monitoring was carried out on the extension bridge of Tanzhou Bridge in Foshan City, Guangdong Province. The Tanzhou Bridge is located in the Tanzhou Waterway downstream of the Liantang Sluice in Foshan. The main bridge of the expanded bridge adopts a 75m+125m+75m prestressed concrete continuous rigid frame box girder bridge (see figure 1 ), the bridge width is 14.25m (including 1.75m sidewalk), the box girder adopts a single-box single-chamber section, the pier body adopts a thin-walled hollow pier, and the pier body section adopts a single-box singl...

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Abstract

The invention discloses a separation method of bridge deflection temperature effect and long-term deflection. Perform multi-scale data fusion processing in units of hours to obtain the first fusion data; apply the IHSSM model to separate the time series of the first fusion data, and separate the daily temperature effect and the first trend item; the separated first trend item Multi-scale data fusion processing is carried out in units of days to obtain the second fusion data; the second fusion data is divided into several fragments, and the data at the same position in the fragments are formed into several data groups, and an IHSSM model is established for each group of data to separate the second season item and the second trend term, which are combined to form the annual temperature effect and long-term deflection, respectively. The invention can accurately obtain each response component of the deflection monitoring signal, and provides a basis for diagnosing bridge structural diseases, evaluating its working state, and the like.

Description

technical field [0001] The invention relates to the field of bridge monitoring research, in particular to a method for separating temperature effects of bridge deflection and long-term deflection. Background technique [0002] Deflection is a crucial parameter in bridge safety evaluation, the effect of load and environment, and the variation of structural materials can be expressed through the change of deflection. Accurately obtaining each response component of the deflection monitoring signal is the premise and basis for correctly diagnosing bridge structural disease, accurately evaluating its working state, and analyzing the mechanism of disease occurrence. [0003] In the actual monitoring data of bridge deflection, the seasonal characteristics, trend characteristics and irregular changes contained in it cannot be directly observed, so the influence of the temperature field on the deflection cannot be directly studied from it, and it can only be decomposed by artificial ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 杨红刘夏平
Owner GUANGZHOU UNIVERSITY
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