Analysis on Arithmetic and Application of Rigidity Distribution for Simply Supported Structure
Bridges under life–long service often suffered from invisible diseases which could cause the bridge stiffness decay (rigidity) and pose great threatening to human lives. This paper focused on studying the real stiffness distribution in a simple beam. The relationship between stiffness and deflection in a bridge segment has been established which is based on the material mechanics, numerical modeling, and reciprocal displacement theorem. The conversion of the deflection curve at mid span resulted from three axle vehicle and single unit load has been developed so that by measuring the deflection caused by low speed vehicle passing over the bridge, the real stiffness distribution of the bridge could then be obtained and the assessment of the bridge damage could be carried out. Compatible software was developed in accordance with the proposed stiffness calculation method. The software was found worked well in predicting the stiffness distribution and the test results supported that the proposed prediction method is applicable. The test results showed that the stiffness distribution in longitudinal direction varied significantly, which is due to the different degrees of damage. The analysis showed that it is not good to use the overall stiffness to evaluate the damage of the whole beam.
simple supported beam longitudinal stiffness invisible damage damage assessment
Ling-bo WANG Xin Kang Pei-wen JIANG
Key Laboratory for Bridge and Tunnel of Shaanxi Province,Changan University,710064,China Civil Engineering,Missouri University of Science and Technology,65401,USA Basic Construction Project Quality Supervision Station,Shaanxi Provincial Transport
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）