Method of separating temperature effect of daily solar radiation from strain monitoring of a concrete bridge

Wang, Yubin; Wang, Lei; Yan, Kai

doi:10.1117/12.2589002

Cited by 3 publications

(3 citation statements)

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“…𝑓 𝐴 = 0.931𝑥 𝐴 + 2.774 (10) 𝑓 𝐷 = 0.208𝑥 𝐷 + 0.009 (11) 𝑓 𝑚𝑎𝑥 = 𝑓 𝐴 + 0.5𝑓 𝐷 (12) 𝑓 𝑚𝑖𝑛 = 𝑓 𝐴 − 0.5𝑓 𝐷 (13) Where: 𝑓 𝐴 is the daily mean hollow pier temperature of the day; 𝑓 𝐷 is the daily variation of the mean hollow pier temperature; 𝑥 𝐴 is the maximum and minimum values of the daily mean air temperature; and 𝑥 𝐷 is the daily variation of the air temperature.…”

Section: Time/daysmentioning

confidence: 99%

“…Therefore, an accurate understanding of the bridge temperature is the key to evaluating its performance during the bridge design and in-service stages [10]. Research on the existing concrete temperature testing found that most of the traditional temperature monitoring programs require temperature sensors to be pre-buried in the concrete structure, which has the advantages of intuition and accuracy, but it cannot be applied to the concrete structure in the service stage and the lack of internal concrete temperature information [11], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

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Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

WU,

Chen,

Yun

et al. 2024

Preprint

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In order to accurately and easily predict the variation of the average temperature of the concrete rectangular hollow pier. Firstly, the temperature distribution of the concrete rectangular hollow pier of Changjiahe Special Bridge was observed for 212 days. Then, based on the observation data, the functional relationship between the average concrete hollow pier temperature and the outside air temperature, and the air temperature inside the hollow pier was studied. Finally, based on this functional relationship, a prediction model for the range of variation of the mean temperature of the hollow pier was given and verified. The results of the study show that: the change of external shade temperature can be regarded as the superposition of different cyclic changes and random changes; the change rule of the average temperature of the concrete hollow pier is the same as that of the air temperature, both presenting day-by-day cyclic and step changes; the linear correlation coefficients between the daily maximum and daily minimum average hollow pier temperature and the daily average air temperature are R = 0.980 and R = 0.973, respectively; the daily average air temperature, the daily average air temperature inside the pier and daily average hollow pier temperature are R = 0.980, R = 0.998; the daily variation of the average hollow pier temperature and the daily variation of the air temperature are approximately linear, with a correlation coefficient of R = 0.899; assuming that the average temperature of the concrete hollow pier is a folding change, based on the above relationship, a method of predicting the time-by-time average temperature of the concrete hollow piers is proposed, as well as two methods of predicting the average temperature of the test piers. average temperature change range method. Comparing the predicted values with the measured values, it is found that the predicted values are in good agreement with the measured values.

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Section: Time/daysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

WU,

Chen,

Yun

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…For in-service stage bridges, due to the thermal expansion and contraction of concrete materials, the larger temperature action of the cross-section will lead to structural deformation, and a large number of concrete disease analyses show that many bridges cracking, breakage, and other diseases are related to the temperature action [6], [7], [8], [9]. Therefore, an accurate understanding of the temperature condition of bridges is the key to evaluating their working performance during the design and service stages [10].…”

Section: Introductionmentioning

confidence: 99%

Prediction of uniform temperature of rectangular hollow concrete pier based on measured temperature data

Chen,

Wu,

Yun

et al. 2023

Preprint

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The standard value of uniform temperature action for bridges is more loosely defined in local bridge design codes. Currently, there is an increasing tendency to determine the range of variation of uniform temperature of bridges based on air temperature information from various locations. In this study, in order to accurately and conveniently predict the range of temperature change of concrete during the design reference period. The temperature distribution of concrete rectangular hollow piers of Changjiahe Special Bridge was observed for 212 days. According to the observation data, the average temperature of the concrete hollow pier was studied as a function of the outside air temperature and the air temperature inside the hollow pier. The method of predicting the range of variation of the average concrete temperature according to the local air temperature material is proposed; the method of predicting the time-by-time uniform temperature of the concrete hollow pier based on the same temperature data inside and outside the hollow pier is proposed. The research results show that: the average temperature change rule of concrete hollow piers and air temperature, are presented day by day cycle and step change, and the hollow pier average temperature extremes appear time lagging behind the air temperature; day maximum, day minimum hollow pier average temperature and the average daily air temperature is linearly correlated between the average daily air temperature, the average daily air temperature, average daily air temperature inside the pier and the average daily hollow pier temperature is linearly correlated between the average daily air temperature and the average daily hollow pier temperature; the average temperature of the hollow pier The magnitude of change is less than the air temperature, hollow pier average temperature daily variation and air temperature daily difference is approximately linear; concrete hollow pier average temperature prediction and measured values, the maximum difference between − 1.1 ~ 0.8 ºC; in the design reference period, in the day of the highest, lowest daily average air temperature on the basis of an increase of 2 degrees Celsius, can be obtained from the range of uniform temperature changes in the bridge abutment.

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Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

Chen,

Wu,

Yun

et al. 2024

Sci Rep

View full text Add to dashboard Cite

In order to accurately and easily predict the variation of the average temperature of the concrete rectangular hollow pier. Firstly, the temperature distribution of the concrete rectangular hollow pier of Changjiahe Special Bridge was observed for 212 days. Then, based on the observation data, the functional relationship between the average concrete hollow pier temperature and the outside air temperature, and the air temperature inside the hollow pier was studied. Finally, based on this functional relationship, a prediction model for the range of variation of the mean temperature of the hollow pier was given and verified. The results of the study show that: the change of external shade temperature can be regarded as the superposition of different cyclic changes and random changes; the change rule of the average temperature of the concrete hollow pier is the same as that of the air temperature, both presenting day-by-day cyclic and step changes; the linear correlation coefficients between the daily maximum and daily minimum average hollow pier temperature and the daily average air temperature are R = 0.980 and R = 0.973, respectively; the daily average air temperature, the daily average air temperature inside the pier and daily average hollow pier temperature are R = 0.980, R = 0.998; the daily variation of the average hollow pier temperature and the daily variation of the air temperature are approximately linear, with a correlation coefficient of R = 0.899; assuming that the average temperature of the concrete hollow pier is a folding change, based on the above relationship, a method of predicting the time-by-time average temperature of the concrete hollow piers is proposed, as well as two methods of predicting the average temperature of the test piers. Average temperature change range method. Comparing the predicted values with the measured values, it is found that the predicted values are in good agreement with the measured values.

show abstract

Method of separating temperature effect of daily solar radiation from strain monitoring of a concrete bridge

Cited by 3 publications

References 0 publications

Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

Prediction of uniform temperature of rectangular hollow concrete pier based on measured temperature data

Prediction of uniform temperature effect on rectangular hollow concrete pier based on measured temperature data

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