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

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

doi:10.3390/s22124557

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…In this paper, the data were analyzed using the visual analysis method, i.e., the polar difference method. The "extreme difference" is a way to visualize the influence of the factors in the test, expressed numerically; the greater the value of the extreme difference, the greater the influence of the factor and vice versa [19][20][21].…”

Section: Nanopowder-cement-modified Silty Soil Orthogonal Testmentioning

confidence: 99%

Mechanical Properties of Composite Silty Soil Modified with Cement and Zirconia-Based Nanopowder

Ren

et al. 2023

Materials

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This study assessed the modification effects of zirconia-based nanopowder and cement contents and curing age on the mechanical properties of silty soil. The orthogonal test design was applied to derive the best combination of each influencing factor using the lateral unconfined compressive test. Two-dimensional particle flow code (PFC2D) distinct-element modeling software was also used to fit and analyze the test curves, as well as simulate the triaxial test with the derived parameters. The test results reveal the optimal combination of 20% cement, 2% zirconia-based nanopowder, and 28 d curing age. The extreme difference table was used to plot the orthogonal trend diagram, and cement content was found to be the most significant factor controlling the silty soil strength. The maximum peak stress was 2196.33 kPa under the optimum combination of factors, which could be obtained through the index estimation, and these results were experimentally verified. According to the predicted strength envelope, the cohesive force of nanopowder-cement-modified silty soil in the optimal proportion was 717.11 kPa, and the internal friction angle was 21.05°. Nano zirconium dioxide will accelerate the hydration reaction of cement, the flocculent structure produced by the hydration of cement and soil particles connected to each other, play the role of filling and anchoring, and thus increase the strength of the nano-zirconium dioxide, and the optimal dosage of nano-zirconium dioxide is 2%.

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Section: Nanopowder-cement-modified Silty Soil Orthogonal Testmentioning

confidence: 99%

Mechanical Properties of Composite Silty Soil Modified with Cement and Zirconia-Based Nanopowder

Ren

et al. 2023

Materials

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“…Abid et al [32] conducted an FE thermal analysis to investigate the behavior of the temperatures across the steel girder section and along the girder depth, finding that the thermal gradient variations at the top and bottom surfaces were comparable. Shiji Huang et al [33] used experimental and numerical thermal analysis methods to investigate the nonuniform and time-dependent temperatures of corrugated web steel beams under environmental thermal loads. To study the effect of the location and its corresponding climatic conditions, a thermal analysis study was conducted for eight cities.…”

Section: Experimental and Numerical Thermal Analyses Of Temperature D...mentioning

confidence: 99%

“…The results indicated a complex and nonuniform action of the steel girder. The maximum temperature difference of approximately 47 • C was determined in the steel girder [33]. Wucheng Xu et al [34] showed that the heat exchange between the different solar radiation components, heat convection and other factors and the boundaries of the steel structures resulted in a significant nonuniform distribution of the temperatures in steel structures.…”

Section: Experimental and Numerical Thermal Analyses Of Temperature D...mentioning

confidence: 99%

Predicting Maximum Effective Temperatures and Thermal Gradients for Steel I-Girder in Canadian Climate Regions

Nassar

Amleh

2023

Applied Sciences

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The constant fluctuation of thermal loads on steel members, especially during construction, causes non-uniform distributions of temperatures, resulting in possible constructional and structural defects leading to unfavorable thermally induced responses and potential safety risks. The Canadian Highway Bridge Design Code (CHBDC) provides one thermal gradient variation profile without accounting for the differences in the geometrical parameters of the steel members and the variations in the climate regions of Canada. Therefore, in this study, three-dimensional finite element (FE) thermal simulations were conducted to investigate the maximum effective temperatures and positive vertical thermal gradients for different Canadian climate regions. Parametric studies were performed to conduct the FE thermal analysis using the thermal model validated in ANSYS. The comprehensive study results showed that Canada could be divided into two main zones for vertical thermal gradient calculations, meaning that one stationary thermal gradient profile cannot be applicable to all climate regions of Canada, as recommended by the CHBDC. Based on the FE thermal analysis results, empirical formulas as a function of the significant parameters were proposed to predict the maximum effective temperature and thermal gradient variations of the steel I-girder. The predicted maximum effective temperature and thermal gradient variation values were found to be highly correlated with the FE values with coefficients of determination R2 of approximately 0.97 and 0.98, respectively.

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“…Li et al [24] proposed that large temperature changes and strong solar radiation would hinder concrete temperature control and crack prevention. Zhu et al [25] proposed that the seasonal variation in the solar azimuth angle will make the solar radiation absorbed by different regions of high arch dams vary greatly, which may lead to an uneven temperature distribution on the surface of high arch dams and then to adverse stress in the construction and operation of high arch dams. Chang et al [26] calculated the influence of solar radiation on the temperature state of a roller compacted concrete (RCC) dam in the high-temperature season and determined that the calculated temperature field considering the influence of sunshine was closer to the actual temperature field.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of the Influence of Solar Radiation on the Surface Temperature Field of Low-Heat Concrete in a Pouring Block

et al. 2023

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With the influence of intense solar radiation heat and the greater temperature difference between day and night, surface concrete with a drastic temperature change can easily experience a great nonlinear temperature difference, which increases the risk of early-age concrete cracking. In this study, a distributed optical fiber temperature sensing (DTS) system is used to monitor the surface temperature gradient of concrete in real time, and a solar radiation heat monitoring test is also carried out based on the Baihetan project. Based on this, a solar radiation loading model and a finite element model of a typical pouring block considering solar radiation are established. Combined with the measured temperature data and different calculation conditions, the surface temperature changes of medium-heat and low-heat concrete experiencing solar radiation are analyzed, and the temperature control effect of surface concrete with different surface insulation measures is further analyzed. The results show that the temperature variation of medium-heat concrete at the same depth is more obvious than that of low-heat concrete. Additionally, the temperature variation of low-heat concrete is noticeable within 20 cm of the top surface. In addition, in an intense solar radiation environment, covering the concrete with a 4- or 5-centimeter-thick polyethylene coil can effectively control the surface temperature gradient and maximum daily amplitude of low-heat concrete, and surface concrete cured by running water has a significant temperature control effect. Therefore, it is suggested that 22–24 °C water temperatures be used for water curing during periods of intense solar radiation during the day and a 4-centimeter-thick polyethylene coil be used for coverage at night. These study results have been employed in the Baihetan project to optimize the temperature control scheme of the pouring blocks.

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

Cited by 4 publications

References 29 publications

Mechanical Properties of Composite Silty Soil Modified with Cement and Zirconia-Based Nanopowder

Mechanical Properties of Composite Silty Soil Modified with Cement and Zirconia-Based Nanopowder

Predicting Maximum Effective Temperatures and Thermal Gradients for Steel I-Girder in Canadian Climate Regions

Experimental and Numerical Study of the Influence of Solar Radiation on the Surface Temperature Field of Low-Heat Concrete in a Pouring Block

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