Abstract
A sufficiently strict conduction of supervision during bridge operation is a crucial matter for many countries, including the underdeveloped country of Viet Nam. In recent times, the budgets in developed countries used for funding the implementation of quality-assessment procedures are quite high compared to the lower budgets in underdeveloped countries. The plan proposed in this work addresses the current lack of information available in the process of structure-quality evaluation. The vibration signals will be acquired from the random circulation status to determine the structure’s behavior so as to utilize the signal information during the bridge span’s operation. The study’s main goal is to find various parameters that can be used to evaluate the actual bridge performance. These parameters must meet certain criteria, such as high sensitivity, low measurement cost, and efficiency in the measurement process, but must not affect the itinerary of vehicles moving on the bridge. The actual structural vibration signals used in this work currently serve as a best trend model for evaluating the operation of the bridge span structure. This study will focus on determining the relationship among deflection, acceleration, and vehicle load so as to evaluate the structure’s working process. This study has also fabricated an experimental model to evaluate and test the sensitivity of the parameters utilized in this study in order to verify the results obtained. The results obtained in this research will be applied for the quality-control process in several bridge models with span structures built with the composite steel concrete cross section of the beam. Many developing countries, including Viet Nam, will receive benefit in the future from the useful advantages presented in this study.
Highlights
Viet Nam is similar to other Southeast Asian countries [1, 2] located in the region, in that it has an interlace system of rivers and canals
After conducting extensive surveys in the Ho Chi Minh City area [3, 4], it was determined that there are more than 1000 bridges [5, 6] and safe operations of these bridges are especially considered as a key focus because of their important role in so many socioeconomic activities. e normal measures of assessing the quality conditions of the bridge structure will be undertaken through an assessment of the bridge structure’s concrete beams and the composite steel concrete cross section of the beam [7, 8]
The inspection, monitoring, and verification of bridge quality are commonly implemented through three main measures as follows: (i) e first measure is a system of human monitoring, giving information that is often more qualitative than quantitative, and that can be somewhat subjective. e techniques of this measure include inspection and monitoring by manual methods, visual inspection, and use of specialized equipment [9,10,11]. is measure has significant advantages and is simple and easy to implement, and the inspection cost for initial investment is low, but it has disadvantages as well: the damages in the details of the bridge structure cannot be detected in a timely fashion, and the bridge material mechanical changes cannot be evaluated
Summary
Viet Nam is similar to other Southeast Asian countries [1, 2] located in the region, in that it has an interlace system of rivers and canals. Is measure has significant advantages and is simple and easy to implement, and the inspection cost for initial investment is low, but it has disadvantages as well: the damages in the details of the bridge structure cannot be detected in a timely fashion, and the bridge material mechanical changes cannot be evaluated. Is measure allows the advantages of characterizing the actual situation of the load, detecting changes in mechanical parameters, locating weakened portions of the structure, and determining the weakening rate over time. Assessing the advantages and disadvantages of all three methods above, this study proposes several methods for building relationships between important parameters in the bridge structure’s vibration process so as to collect data for the vibrations and deformation of the structure under the effects of random loads during operation and utilization. The results in this study, which have been implemented in practice, will establish a database source facilitating the application of these advanced methods in quality assessment and project management. is is the basis for expanding these research methods and conducting future bridge evaluations
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