Study on the Mechanical Properties of the Pavement Layer of Urban Simply Supported Concrete Bridge Deck
The bridge deck pavement directly bears the vehicle load and also plays a role in protecting the bridge deck.Damage to the pavement will have a significant impact on the use and safety of the bridge.Taking the Yunyanhe Bridge on Huaguoshan Avenue in Lianyungang City as the research object,this study analyzes the bending normal stress of the bridge deck pavement layer under live load,derives its analytical formula,and conducts example calculations.The results show that the surface bending stress of the upper and lower layers increases linearly with the increase of their elastic modulus,and decreases with the increase of their thickness;The study uses MIDAS/Civil finite element software to simulate the temperature field of bridge deck pavement.The results show that the larger the temperature difference gets,the greater the temperature stress generates,and the temperature stress increases linearly with the increase of concrete elastic modulus;Simultaneously the study analyzes the temperature and stress changes of the cement concrete pavement layer under the action of hydration heat,it is found that the maximum temperature rise occurs near 10 hours of pouring the concrete pavement layer,with a maximum temperature of 24.11 ℃.The maximum tensile stress of the pavement layer during the construction stage is mainly distributed on the surface of the pavement layer and within a range of 5 cm below it,with a maximum value of about 2.3 MPa.
bridge deck pavement layerfinite element modelbending normal stresshydration heat
万方数据
维普
