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波形钢腹板体外预应力组合箱梁的显著特点是用波形钢腹板取代了混凝土腹板,其受力性能与常规预应力混凝土箱梁有较大差别。为了研究剪切变形和日照温度效应对大跨波形钢腹板预应力组合箱梁桥线形控制影响,本文以桃花峪黄河大桥跨大堤桥为背景进行了分析,研究表明:(1)剪切变形对大跨波形钢腹板预应力组合箱梁挠度影响不可忽略,需要以能精确模拟此类结构构造特点的空间有限元分析计算为基础进行该类结构线形控制。(2)在日照温度挠度效应方面,波形钢腹板预应力组合箱梁的日照温度挠度效应趋势和常规PC箱梁相同,但是其温度挠度变化比同跨径常规PC箱梁小。
The notable feature of externally prestressed composite box girder with corrugated steel webs is that the corrugated steel webs replace the concrete webs and the mechanical properties of corrugated steel webs are different from those of conventional prestressed concrete box girders. In order to study the effect of shear deformation and sunshine temperature on the linear control of long-span prestressed composite box girder bridge with corrugated steel webs, this paper analyzed the peach embankment bridge of Taohuayu Yellow River as the background. The results show that: (1) Shear deformation The deflection of prestressed composite box girder with large-span corrugated steel webs can not be neglected. The linear control of such structures needs to be based on the finite element analysis of space which can accurately simulate the structural features of such structures. (2) In sunshine temperature deflection effect, the sunshine temperature deflection effect of corrugated steel web prestressed composite box girder tends to be the same as that of conventional PC box girder, but its temperature deflection change is smaller than that of conventional cross-diameter PC box girder.