【摘要】 由于桥面铺装层的存在,可以有效地降低箱梁内的梯度温度,从而减小温差应力,但是新桥规只给出了单一桥面铺装层的温度基数取值,对于经常遇到的双层或多层桥面铺装并没有明确规定。通过一座双层桥面铺装的连续箱梁桥的计算与对比分析,提出了常见的双层桥面铺装的箱梁内温度梯度计算的实用方法,研究表明,对于有双层铺装层的箱梁桥,设计时考虑每层铺装层对箱梁梯度温度的影响更符合实际。更多还原

【Abstract】 Bridge-deck pavement can reduce temperature gradient of box girder with temperature stress declined.But it only gives temperature number of single bridge-deck pavement in New Bridge Code without definitude provisions of two or multi-layer pavement which is wide spread availability.According to the calculation and comparison analysis of a continuous box girder bridge,utility method for calculating temperature gradient of double layer box girder-deck pavement is provided.The results show that it′s practical to consider influence of each pavement on temperature gradient while designing box girder with two pavement layers.更多还原