贵广铁路大跨预应力混凝土连续梁端部局部应力分析

Analysis on local Stress of the End of Long-span Prestressed Concrete Continuous Girder in Guiyang-Guangzhou Railway

针对大跨度预应力混凝土连续梁端部预应力锚固区,探讨梁体局部应力分析时预应力钢筋的模拟方法,采用优化后的建模方法建立了三向预应力作用下的梁端锚固区的有限元模型,分析了梁端部锚固区的受力机理,结果表明梁端设计合理,分析方法可靠。

As to the prestressed anchorage zone of long-span railway prestressed concrete continuous girder, the prestressed steel bar simulation method for local stress analysis is researched in this thesis. By using the optimized modeling method, the finite element model of prestressed anchorage zone under the action of three-dimensional prestress is built, and the stress mechanism of anchorage zone at the end of the girder is analyzed. The results show that the design for the girder end is reasonable, and the analysis method is reliable as well.