Performance alarming method for bridge expansion joints based on temperature displacement relationship model

Patent metadata

Field	Value
Publication number	US-10970427-B2
Application number	US-201816336807-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Jun 26, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

The present invention belongs to the technical field of health monitoring for civil structures, and a performance alarming method for bridge expansion joints based on temperature displacement relationship model is proposed. First, the canonically correlated temperature is proposed to maximize the correlation between bridge temperature field and expansion joint displacement; second, a temperature displacement relationship model for bridge expansion joints is established based on canonically correlated temperatures; then, a mean-value control chart is constructed to the error of temperature displacement relationship model; finally, reasonable control limits are determined for the mean-value control chart. A more accurate temperature displacement relationship model can be established based on canonically correlated temperatures, which is of important value to improve the performance alarming ability for expansion joint.

First claim

The invention claimed is:

1. A performance alarming method for bridge expansion joints based on temperature displacement relationship model, wherein specific steps of which are as follows:
step 1: calculate canonically correlated temperatures of a bridge structure acquire T and D of the bridge structure, T=[T 1 , T 2 , . . . T m ] T represents a measurement sample of m temperature measurement point in a structural health monitoring system, D=[D 1 , D 2 , . . . , D n ] T represents a measurement sample of n expansion joint displacements, calculate a covariance matrix and a cross-covariance matrix of temperature and displacement monitoring data as follows:

R
TT

=

1

l
-
1

⁢

∑

t
=
1

l

⁢

{

T
⁡

(
t
)

-

T
_

}

⁢

{

T
⁡

(
t
)

-

T
_

}

T

R
DD

=

1

l
-
1

⁢

∑

t
=
1

l

⁢

{

D
⁡

(
t
)

-

D
_

}

⁢

{

D
⁡

(
t
)

-

D
_

}

T

R
TD

=

1

Assignees

• Univ Dalian Tech

Inventors

• Yi Tinghua
• Huang Haibin
• Li Hongnan

Classifications

• G06F17/16

  Matrix or vector computation {, e.g. matrix-matrix or matrix-vector multiplication, matrix factorization (matrix transposition G06F7/78)} · CPC title

• E01D19/06

  Arrangement, construction or bridging of expansion joints ({E01D19/005 takes precedence; in movable bridges E01D15/005 - E01D15/10}; sealing joints not restricted to expansion joints for bridges E04B1/68) · CPC title

• G06F30/13 Primary

  Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads · CPC title

• G06F17/15

  Correlation function computation {including computation of convolution operations (arithmetic circuits for sum of products per se, e.g. multiply-accumulators G06F7/5443; digital filters, e.g. FIR, IIR, adaptive filters H03H17/00)} · CPC title

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title