A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-pile wharf foundation pile damage diagnosis method based on structural residual modal force
The invention discloses a high-pile wharf foundation pile damage diagnosis method based on structural residual modal force. The method includes the steps that a finite element model of a high-pile wharf foundation pile structure is established, the structure is divided into a plurality of units, and each unit comprises two nodes; an acceleration sensor is arranged on each unit, and modal test data detected under natural environment excitation are recorded and saved; modal parameter recognition is performed on the modal test data, and a low-order modal frequency and a vibration mode of previous orders are recognized; model correction is performed, and a reference finite element model is obtained; under the non-damage and damage condition, a rigidity matrix and a mass matrix of each unit are extracted; and each freedom-degree residual modal force vector in each unit is calculated, when the absolute value of each freedom-degree residual modal force vector in each unit is larger than a set value, it is judged that damage exists, and the position where structural damage is located is positioned according to the nodes corresponding to freedom degrees. Only through low-order modal information generated before and after structural damage, damage diagnosis can be performed under the condition that the structure has single damage and multi-site damage.
High-pile wharf foundation pile damage diagnosis method based on structural residual modal force
The invention discloses a high-pile wharf foundation pile damage diagnosis method based on structural residual modal force. The method includes the steps that a finite element model of a high-pile wharf foundation pile structure is established, the structure is divided into a plurality of units, and each unit comprises two nodes; an acceleration sensor is arranged on each unit, and modal test data detected under natural environment excitation are recorded and saved; modal parameter recognition is performed on the modal test data, and a low-order modal frequency and a vibration mode of previous orders are recognized; model correction is performed, and a reference finite element model is obtained; under the non-damage and damage condition, a rigidity matrix and a mass matrix of each unit are extracted; and each freedom-degree residual modal force vector in each unit is calculated, when the absolute value of each freedom-degree residual modal force vector in each unit is larger than a set value, it is judged that damage exists, and the position where structural damage is located is positioned according to the nodes corresponding to freedom degrees. Only through low-order modal information generated before and after structural damage, damage diagnosis can be performed under the condition that the structure has single damage and multi-site damage.
High-pile wharf foundation pile damage diagnosis method based on structural residual modal force
SUN XIPING (author) / ZHANG GAN (author) / ZHANG QIANG (author) / ZHANG BAOHUA (author) / LI TIELIANG (author)
2015-11-18
Patent
Electronic Resource
English
| European Patent Office | 2024
Method for repairing fracture damage of wharf pile foundation
| European Patent Office | 2023
Method for reinforcing high-pile wharf pile foundation through anchor bar piles
| European Patent Office | 2024
Tubular pile guide device for wharf pile foundation structure construction
| European Patent Office | 2023