Investigation of concrete box girder positive temperature gradient patterns considering different climatic regions

Cai, Chenzhi; Huang, Shiji; He, Xuhui; Zhou, Tan; Zou, Yunfeng

doi:10.1016/j.istruc.2021.11.030

Cited by 25 publications

(9 citation statements)

References 20 publications

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“…where f (x,y,z) represents the beam's temperature distribution at the starting time and the terms n x , n y , and n z stand for the direction cosines of the normal vectors. The total heat flux q on the boundary surfaces consists of the following four portions [21][22][23]: the convection heat flux q c , the total solar radiation heat flux q s , the long-wave radiation heat flux q l , and the mutual radiation heat flux q m . The heat flux induced by convection can be evaluated with following equation:…”

Section: Finite Element Model Of the Steel Beam 41 Basic Theory For T...mentioning

confidence: 99%

“…The surface solar radiation is dependent on the solar constant I sc and the transmission in the atmosphere. The temporal variations of the solar radiation can be calculated by the empirical equations provided below [21,31,32]:…”

Section: Long-term Environmental Data Environmental Datamentioning

confidence: 99%

“…In this section, the steel beam's extreme daily temperature difference is determined on the basis of the probability theory considering a return period of 50 years. The probability P for the temperature gradients exceeding the extreme value can be calculated as [21,35]:…”

Section: Extreme Value Analysis For Thermal Gradientmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Temperature Variations and Extreme Temperature Differences for the Corrugated Web Steel Beams under Solar Radiation

Huang

Cai

Zou

et al. 2022

Sensors

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Due to the coupling impacts of solar radiation, wind, air temperature and other environmental parameters, the temperature field of steel structures is significantly non-uniform during their construction and service stages. Corrugated web steel beams have gained popularity in structural engineering during the last few decades, while their thermal actions are barely investigated. In this paper, both experimental and numerical investigations were conducted to reveal the non-uniform features and time variation of the corrugated web steel beams under various environmental conditions. The heat-transfer simulation model was established and verified using the experimental temperature data. Both the experiment and simulation results demonstrate that the steel beam has a complicated and non-uniform temperature field. Moreover, 2-year continuous numerical simulations of steel beams’ thermal actions regarding eight different cities were carried out to investigate the long-term temperature variations. Finally, based on the long-term simulation results and extreme value analysis (EVA), the representative values of steel beams’ daily temperature difference with a 50-year return period were determined. The extreme temperature difference of the steel beam in Harbin reached up to 46.9 °C, while the extreme temperature difference in Haikou was 28.8 °C. The extreme temperature difference is highly associated with the steel beam’s location and surrounding climate. Ideally, the outcomes will provide some contributions for the structural design regarding the corrugated web steel beam.

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Section: Finite Element Model Of the Steel Beam 41 Basic Theory For T...mentioning

confidence: 99%

Section: Long-term Environmental Data Environmental Datamentioning

confidence: 99%

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Investigation of Temperature Variations and Extreme Temperature Differences for the Corrugated Web Steel Beams under Solar Radiation

Huang

Cai

Zou

et al. 2022

Sensors

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“…Several empirical equations were obtained by regression analysis for predicting the cross‐sectional maximum vertical and horizontal temperature differences in concrete box‐girders. Cai et al 9 numerical investigated the temperature variations of concrete box‐girders located in different climatic regions. Based on the simulation and statistical method, a temperature pattern had been put forward to evaluate the thermal actions on concrete box‐girders over different regions.…”

Section: Introductionmentioning

confidence: 99%

“…Lots of investigations have been conducted to explore the impacts of environmental factors on the temperature distributions in concrete, [8][9][10][11][12][13] steel, [14][15][16][17][18][19][20] and composite bridges. [21][22][23][24][25][26][27][28][29][30][31] Abid et al 8 conducted an experimental investigation on a full-scale box-girder segment for one and a half years.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on the temperature distribution of composite box‐girders with corrugated steel webs

Huang

Cai

Zou

et al. 2022

Structural Contr & Hlth

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Although composite box-girders with corrugated steel webs have been widely applied in practical bridge constructions, the nonuniform temperature field in the composite box-girders without sufficient study may lead to negative effects on the durability of bridge structures. Thus, this paper focuses on the temperature distribution characteristics of the composite box-girder with corrugated steel webs. The temperature data of a corrugated steel web box-girder specimen has been measured. An apparent nonuniform temperature distribution of

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Data-driven methods for predicting the representative temperature of bridge cable based on limited measured data

Wang,

Dai,

et al. 2024

J. Cent. South Univ.

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Investigation of concrete box girder positive temperature gradient patterns considering different climatic regions

Cited by 25 publications

References 20 publications

Investigation of Temperature Variations and Extreme Temperature Differences for the Corrugated Web Steel Beams under Solar Radiation

Investigation of Temperature Variations and Extreme Temperature Differences for the Corrugated Web Steel Beams under Solar Radiation

Experimental and numerical investigation on the temperature distribution of composite box‐girders with corrugated steel webs

Data-driven methods for predicting the representative temperature of bridge cable based on limited measured data

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