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随着我国基础设施建设的迅速发展,大跨径先简支后连续预制T梁,以显著的经济性和安全性优势,在桥梁建设中被广泛应用,通常设计图纸中除对预制T梁有预应力混凝土张拉强度要求外,同时对预应力混凝土抗拉凝期有要求。以控制预制T梁的后期徐变和跨中挠度,文章以新疆伊犁可克达拉特大桥工程为例,分析了预应力混凝土张拉凝期及存放时间对挠度的影响程度,具有一定的理论依据和参考价值,以达到互相学习和借鉴,并应用于类似工程的目的。
With the rapid development of China’s infrastructure construction, the long-span first prefabricated T-beam is simply prefabricated, and it is widely used in the construction of bridges with obvious economic and security advantages. In general, Prestressed concrete tensile strength requirements, while prestressed concrete tensile resistance requirements. In order to control the post-creep and mid-span deflection of prefabricated T-beams, the paper takes the Kekelarat Bridge in Yili, Xinjiang as an example to analyze the degree of influence of prestressing concrete on the deflections and deflation, and has some theories Based on reference value, in order to achieve mutual learning and reference, and applied to the purpose of similar projects.