论文部分内容阅读
连续配筋水泥混凝土(Continuously Reinforced Concrete,简称为CRC)+沥青混凝土(Asphalt Concrete,简称为AC)复合式路面的配筋设计方法尚不完善,根据气候条件,各地用的配筋量也有较大区别。在连续配筋水泥混凝土路面上加铺不同厚度的沥青层,将改变连续配筋水泥混凝土路面内的温度场和温度应力分布状态,并影响钢筋位置的裂缝宽度。文中利用自行开发的RP_TMP路面温度场计算程序,计算了5cm、10cm、15cm等3种加铺层厚度对水泥混凝土路面温度应力及钢筋位置裂缝宽度的影响;采用美国AASHTO2002设计指南中平均开裂间距和裂缝宽度确定方法,以裂缝宽度不超过0.5mm作为控制指标。计算结果显示,AC层的厚度每增加1cm,配筋率大约可以降低0.01%。研究计算结果可以用于指导复合式路面的配筋设计。
The design method of continuous reinforcement concrete (Continuously Reinforced Concrete, CRC for short) and Asphalt Concrete (AC) composite road surface is not perfect, and the amount of reinforcement used in each area is also larger according to the climatic conditions the difference. Laying asphalt layers with different thicknesses on continuous reinforced concrete pavement will change the temperature field and temperature stress distribution in continuous reinforced concrete pavement and affect the crack width at the location of steel bar. In this paper, the self-developed RP_TMP pavement temperature field calculation program was used to calculate the influence of three kinds of overlay thickness, such as 5cm, 10cm and 15cm, on the temperature stress of cement concrete pavement and the crack width at the location of rebar. Using the average cracking distance in the design guide of AASHTO 2002 Crack width to determine the method to crack width of not more than 0.5mm as a control indicator. The calculated results show that for every 1 cm AC thickness increase, the reinforcement ratio can be reduced by about 0.01%. The results of the study can be used to guide the reinforcement design of composite pavement.