Study on Iterative Modification Method of Parameters in the Health Monitoring of Large-Span Continuous Rigid Frame Bridges

2022 ◽  
Author(s):  
Duo Wu ◽  
Laijun Liu
Keyword(s):  
Health Monitoring ◽  
Large Span ◽  
Rigid Frame ◽  
Modification Method

Load testing and health monitoring of monolithic bridges with innovative reinforcement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kexin Zhang ◽  
Tianyu Qi ◽  
Dachao Li ◽  
Xingwei Xue ◽  
Zhimin Zhu
Keyword(s):  
Health Monitoring ◽  
Construction Process ◽  
Content Type ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Steel Strand ◽  
Before And After ◽  
Load Tests ◽  
Rigid Frame Bridge ◽  
Strengthening Method

PurposeThe paper aims to investigate effectiveness of the strengthening method, the construction process monitoring, fielding-load tests before and after strengthening, and health monitoring after reinforcement were carried out. The results of concrete strain and deflection show that the flexural strength and stiffness of the strengthened beam are improved.Design/methodology/approachThis paper describes prestressed steel strand as a way to strengthen a 25-year-old continuous rigid frame bridge. High strength, low relaxation steel strand with high tensile strain and good corrosion resistance were used in this reinforcement. The construction process for strengthening with prestressed steel strand and steel plate was described. Ultimate bearing capacity of the bridge after strengthening was discussed based on finite element model.FindingsThe cumulative upward deflection of the second span the third span was 39.7 mm, which is basically consistent with the theoretical value, and the measured value is smaller than the theoretical value. The deflection value of the second span during data acquisition was −20 mm–10 mm, which does not exceed the maximum deflection value of live load, and the deflection of the bridge is in a safe state during normal use. Thus, this strengthened way with prestressed steel wire rope is feasible and effective.Originality/valueThis paper describes prestressed steel strand as a way to strengthen a 25-year-old continuous rigid frame bridge. To investigate effectiveness of the strengthening method, the construction process monitoring, fielding-load tests before and after strengthening and health monitoring after reinforcement were carried out.

scholarly journals Anomaly detection for large span bridges during operational phase using structural health monitoring data

2020 ◽  
Vol 29 (4) ◽  
pp. 045029 ◽  
Author(s):  
Xiang Xu ◽  
Yuan Ren ◽  
Qiao Huang ◽  
Zi-Yuan Fan ◽  
Zhao-Jie Tong ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Anomaly Detection ◽  
Health Monitoring ◽  
Monitoring Data ◽  
Large Span ◽  
Structural Health ◽  
Operational Phase

Analysis of Sensitive Factors of Long-Span Continuous Rigid Frame Bridge’s Stability with Thin-Wall Piers in the Construction Stage

2011 ◽  
Vol 255-260 ◽  
pp. 921-925 ◽  
Author(s):  
Hai Jun Wu ◽  
Yu Qiang Kang ◽  
Lei Zhang
Keyword(s):  
Prestressed Concrete ◽  
Wind Load ◽  
Basic Theory ◽  
Thin Wall ◽  
Large Span ◽  
Long Span ◽  
Rigid Frame ◽  
Main Factors ◽  
High Pier ◽  
The Stability

Analyzing the basic theory of stability, with a high pier of large span prestressed concrete continuous bridge as the example, the stability was analyzed when constructing, considering wind load, hanging basket, pier etc. Both eigenvalue and mode are got for the longest cantilever ting condition, the sensitivity of stability to various loads being analyzed. It is concluded that the unbalanced weight and the falling of basket are the main factors.

Application of Health Monitoring Technology in Steel Structure Engineering of Jinan Olympic Sports Center

2014 ◽  
Vol 578-579 ◽  
pp. 1170-1176 ◽  
Author(s):  
Xue Jun Zhou ◽  
Rong Qian Yang ◽  
Xiao Ma ◽  
Yuan Xu
Keyword(s):  
Health Monitoring ◽  
Steel Structure ◽  
Steel Structures ◽  
World Health ◽  
Monitoring Technology ◽  
Large Span ◽  
Complex Structural ◽  
And Behavior ◽  
Structure Result ◽  
Structure Engineering

Complex structural pattern and behavior of Large-span steel structure result in famous research of health monitoring technology of this kind structure all over the world. Health monitoring to key parts of large-span steel structures during the construction and service process grasp the stress situation, which can ensure the safety of structures. In this paper, health monitoring project of Jinan Olympic Sports Center is introduced and the basis of test points’ layout is elaborated in detail. The result shows that the system designed is running stable, which means it has certain application value to other health monitoring to major engineering.

Finite Element Modeling for Health Monitoring and Condition Assessment of Large-Span Steel Roof Unloading Process

2012 ◽  
Vol 166-169 ◽  
pp. 1370-1374
Author(s):  
Ya Xiong Liang ◽  
Xiu Li Wang ◽  
Hai Min Zhong
Keyword(s):  
Finite Element ◽  
Health Monitoring ◽  
Health Assessment ◽  
Steel Structure ◽  
Internal Force ◽  
Large Span ◽  
Structural Health Assessment ◽  
Finite Element Software ◽  
On Line ◽  
Steel Roof

The health monitoring and diagnosis of the major engineering structure is increasingly extensive attention from all the community. In particular, for the complex large-span steel roof unloading process, it is important especially. The unloading process will cause the change of structure stiffness include the internal force redistribution. The real-time and on-line monitoring have been applied to Xining stadium of the stress in the process of unloading for the purpose of structural health assessment in the paper, so as to achieve the purpose of the early warning of the problems which may arise in construction process. At the same time, through the comparison of the finite element software ANSYS analogue simulation and the value of the actual, it is obtained for the quality problem of steel structure in the process of unloading.

Study on Optimizing Design of Structural Rigidity of Super-Large Span Continuous Rigid Frame Bridge Using ANSYS

2012 ◽  
Vol 446-449 ◽  
pp. 1243-1247 ◽  
Author(s):  
Xing Wei Xue ◽  
Hong Yuan ◽  
Shan Qing Li
Keyword(s):  
Large Span ◽  
Continuous Rigid Frame Bridge ◽  
Structural Rigidity ◽  
Rigid Frame ◽  
Meaningful Result ◽  
Optimizing Design ◽  
Sutong Bridge ◽  
Rigid Frame Bridge ◽  
Midspan Deflection

In this paper, the situation of the midspan deflection of the span continuous rigid frame bridge is described, and the cause of the deflection is explained. It may be caused by the problem of the rigidity. Then the ANSYS is used to conduct analysis. The deflection of the biggest cantilever of the rigid frame bridge is the controlled target, and the optimizing design of the Sutong bridge is conducted. A meaningful result is obtained, and it provides a basis of the choice of the height of beams.

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