Paper Title:
Damage Detection for Truss Structures Depending on Method of Change in Elemental Modal Strain
  Abstract

In order to improve efficiency and reliability for damage detection, based on the characteristics of truss structures, the elemental modal strain can be derived from the nodal modal displacements by means of the finite element method on spatial truss elements connected by pin at elemental two nodes. Therefore it is presented as a new dynamic detective indicator using changes between an intact structure and a corresponding destructive structure in the elemental lower modal strain, and then a new method of damage localization named as change in elemental modal strain is set up for truss structures. A numerical example for a planar truss structure is provided to verify the practicability of the method only by one lower mode. The results show that this method is effective to locate not only single damage but also multiple ones, both light damages and severe ones. Furthermore, the results indicate that the proposed method based on modal strain of truss elements can accurately detect damage locations of truss structures with the noisy modal data.

  Info
Periodical
Advanced Materials Research (Volumes 163-167)
Edited by
Lijuan Li
Pages
2537-2542
DOI
10.4028/www.scientific.net/AMR.163-167.2537
Citation
Y. M. Li, G. F. Sun, B. Y. Yang, X. Y. Zhou, X. Y. Gao, "Damage Detection for Truss Structures Depending on Method of Change in Elemental Modal Strain", Advanced Materials Research, Vols. 163-167, pp. 2537-2542, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhi Hua Wang, Jianyun Chen, Yonggang Zhao, Hong Wei Ma
Abstract:In the present paper, the Damage Location Assurance Criterion (DLAC) is extended to locate and assess damage in a circular cylindrical shell...
565
Authors: Fei Zheng, Jin Yu Xu, Yong Chen, De Hui Zhao
Abstract:Underground arch structure is an important structure form of civil air defense engineering, and its damage detection is an important link in...
2576
Authors: Yan Song Diao, Fei Yu, Dong Mei Meng
Chapter 2: Monitoring and Control of Structures
Abstract:When the AR model is used to identify the structural damage, one problem is often met, that is the method can only make a decision whether...
1211
Authors: You Bao Jiang, Guo Yu Liao
Chapter 1: Vibration Engineering
Abstract:Modal parameters are widely adopted to identify structural damages. This paper explores the mode jumping problems in damage identification...
307
Authors: Feng Ge Li, Hong Yu
Chapter 2: Disaster Prevention and Reduction of Civil Engineering
Abstract:A new method to diagnose the damage of masonry structure using artificial network is brought forward. The frequencies and the ratio of change...
1148