Analysis on the Daily Temperature Variation of a Concrete Slab under Environmental Effects

The dynamic temperature field of a concrete slab is actively studied in this study with the aiding of the commercial package ANSYS. Fine finite element model of the concrete slab is constructed and different boundary conditions are applied to obtain the temperature distribution within the slab with the aid of the commercial software package ANSYS. The solar radiation model is utilized to estimate the solar radiation received by the slab and the shelter effects are also taken into consideration. The numerical models can successfully predict the structural temperature at different time. The made observations demonstrate that the simulated temperature variation of the concrete slab based on the solar radiation model agrees well with measurement results. It is seen that the numerical models can successfully predict the structural temperature field at different time. The methodology employed in the paper can be applied to other concrete structures as well.

Download Full-text

Evaluation on the Thermal Stresses of a Concrete Slab under Solar Radiation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.2542 ◽

2013 ◽

Vol 671-674 ◽

pp. 2542-2546 ◽

Cited By ~ 1

Author(s):

Jian Ping Wang ◽

Bo Chen ◽

Jin Zheng ◽

Peng Yun Li

Keyword(s):

Stress Distribution ◽

Solar Radiation ◽

Thermal Stresses ◽

Numerical Models ◽

Concrete Slab ◽

Element Model ◽

Time Varying ◽

Radiation Model ◽

Structural Temperature ◽

Solar Radiation Model

The time-varying temperature field and stress distribution of a concrete roof slab is actively investigated in this study with the aiding of the commercial package ANSYS. Fine finite element model of the concrete slab is constructed and different boundary conditions are applied to obtain the temperature distribution within the slab. The solar radiation model is utilized to estimate the solar radiation received by the slab and the shelter effects are also taken into consideration. The numerical models can successfully predict the structural temperature gradient and thermal stress distribution at different time. The made observations indicate that the simulated temperature variation of the concrete slab based on the solar radiation model agrees well with measurement results. It is seen that the numerical models can successfully predict the structural time-varying thermal effects.

Download Full-text

Solar Radiation-Induced Temperature Variation of Concrete Bridge Piers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.178-181.2451 ◽

2012 ◽

Vol 178-181 ◽

pp. 2451-2455 ◽

Cited By ~ 1

Author(s):

Bo Chen ◽

Xiu Jin Li ◽

Han Ming Pan ◽

Jin Zheng

Keyword(s):

Temperature Field ◽

Temperature Variation ◽

Numerical Models ◽

Time Instant ◽

Concrete Bridges ◽

Concrete Bridge ◽

Thermal Boundary Conditions ◽

Infrared Imager ◽

Structural Temperature ◽

Radiation Induced

The dynamic temperature field of a concrete pier is actively studied in this study with the aiding of the commercial package ANSYS. Thermal boundary conditions are utilized to obtain the temperature distribution of the concrete bridge pier. The surface temperature of the pier is measured by using a thermal infrared imager at different time instant. The ambient temperature and wind velocity are also collected at the same time. The made observations demonstrate that the simulated temperature variation of the concrete pier agrees well with measurement results. The thermal gradient of the concrete in the thickness direction is a little large. It is seen that the numerical models can successfully predict the structural temperature field at different time. The methodology employed in the paper can be applied to other concrete bridges as well.

Download Full-text

Temperature Variation of Concrete-Steel Deck Plate under Solar Radiation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.158 ◽

2010 ◽

Vol 44-47 ◽

pp. 158-162

Author(s):

Bo Chen ◽

Jin Zheng ◽

Jian Ping Wang

Keyword(s):

Heat Transfer ◽

Temperature Distribution ◽

Solar Radiation ◽

Temperature Variation ◽

Heat Transfer Analysis ◽

Time Varying ◽

Radiation Model ◽

Deck Plate ◽

Solar Radiation Model ◽

Steel Deck

The analysis of time-varying temperature field of a composite concrete-steel deck plate under strong solar radiation is carried out in this study. By assuming the temperature distribution along the bridge longitudinal direction is basically constant, one typical segment of the deck plate is investigated. Two-dimensional heat transfer models are utilized to determine the time-dependent temperature distribution of deck plate, deck trough and deck pavement of the bridge. A modified solar radiation model is utilized to predict the variation of solar radiation in a whole day. A thermodynamic model is established and a transient heat transfer analysis is conducted to predict the time-varying temperature distribution of the deck plate at different time. The measured ambient temperature data are used as thermal boundary conditions during the numerical analysis. The made observations demonstrate that the simulated temperature variation of the deck plate based on the modified solar radiation model agrees well with measurement results, as compared with those obtained from the traditional solar radiation model..

Download Full-text

A SOLAR RADIATION MODEL FOR SOMALIA

Intersol Eighty Five ◽

10.1016/b978-0-08-033177-5.50475-0 ◽

1986 ◽

pp. 2523-2527

Author(s):

A.Y. Habbane ◽

J.C. McVeigh

Keyword(s):

Solar Radiation ◽

Radiation Model ◽

Solar Radiation Model

Download Full-text

A New Solar Radiation Model for a Power System Reliability Study

IEEE Access ◽

10.1109/access.2019.2916168 ◽

2019 ◽

Vol 7 ◽

pp. 64758-64766 ◽

Cited By ~ 4

Author(s):

Hamza Abunima ◽

Jiashen Teh ◽

Hussein Jumma Jabir

Keyword(s):

Solar Radiation ◽

Power System ◽

System Reliability ◽

Power System Reliability ◽

Reliability Study ◽

Radiation Model ◽

Solar Radiation Model

Download Full-text

Effect of Non-Uniform Solar Temperature Field on Cable-Net Structure of Reflector of Large Radio Telescope-FAST

Advances in Structural Engineering ◽

10.1260/136943309789508447 ◽

2009 ◽

Vol 12 (4) ◽

pp. 503-512 ◽

Cited By ~ 16

Author(s):

Feng Fan ◽

Xiao-Fei Jin ◽

Shi-Zhao Shen

Keyword(s):

Temperature Field ◽

Radio Telescope ◽

Element Model ◽

Wave Radiation ◽

Worst Case ◽

Climate Conditions ◽

Surrounding Environment ◽

Long Wave ◽

Structural Temperature ◽

Reflector Geometry

The effect of a non-uniform solar temperature field on the cable-net structure of the reflector of a five-hundred-meter aperture spherical radio telescope-FAST was analyzed using the thermal analysis module of ANSYS. The integral parametric finite element model of the reflector structure with its measured landform was built, and the boundary conditions of periodic air temperature, solar radiation, long-wave radiation and shadows of surrounding environment, etc, were computed at intervals of half an hour under a cloudless sky on a summer day, as one of the worst-case climate conditions. The transient structural temperatures were then analyzed under sunshine which lasted for several days with a rational initial structural temperature distribution until the whole set of structural temperatures converged to the results obtained the day before. The corresponding structural analysis was then carried out. The results indicate that the highest local temperature difference goes up to 11° and the maximum r.m.s. error of fitting of the reflector geometry is about 2.2mm.

Download Full-text