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结合位于日本的一座在建公路高架立交桥,对其独柱桥墩进行受力分析,重点研究张拉预应力钢筋阶段和竣工阶段预应力混凝土盖梁上例及其与钢筋混凝土墩柱结合处的受力状态,并针对张拉预应力钢筋阶段可能出现的问题采取适当的措施。与此同时,研究盖梁中有效预应力的不同取值对其受力性能的影响,检验结构设计的合理性。研究表明,施加适当预应力能够有效地改善桥墩的受力性能,且桥墩结构的设计是合理的,但是在施工过程中应该采取适当的安全措施以避免发生混凝土开裂等问题。
Combined with a highway overpass under construction in Japan, the stress analysis of the single-column piers is carried out, focusing on the example of the prestressed concrete capping beams in the prestressed reinforced concrete bar and the completed phase of the prestressed concrete bar and the connection with the reinforced concrete pier Force status, and take appropriate measures for the problems that may occur during the prestressing of the prestressed steel. At the same time, the influence of different prestressing values on the load-bearing capacity of the girder is studied, and the rationality of structural design is verified. The research shows that the appropriate prestressing can effectively improve the mechanical properties of piers, and the design of pier structure is reasonable. However, appropriate safety measures should be taken during the construction to avoid cracking of concrete.