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通过对有机玻璃波形腹板悬臂组合箱梁模型试验研究,考察了在单点对称加载作用下悬臂波形腹板箱梁的力学性能,同时对结构截面应变、变形和腹板剪应力计算进行了理论分析,并提出了考虑剪切变形影响的悬臂波形腹板组合箱梁的挠度计算公式。结果表明:悬臂波形腹板组合箱梁的实测应力与理论结果一致;腹板纵向应变分布满足平截面假定;波形腹板承担了截面大部分的剪力;悬臂波形腹板组合箱梁的挠度计算应计入剪切变形所产生的挠度增量,该结果可为工程设计和施工控制提供重要的参考依据。
Based on the model test of cantilever composite box girder with corrugated webs of plexiglass, the mechanical properties of cantilever corrugated web box girder under single-point symmetrical loading were investigated. The theory of strain, deformation and web shear stress calculation The deflection formula of cantilever corrugated webs with box girder considering the influence of shear deformation is proposed. The results show that the measured stress of cantilever corrugated web box girder is consistent with the theoretical results. The longitudinal strain distribution of the web satisfies the assumption of flat section. The corrugated web assumes most of the shear force. The deflection of cantilevered corrugated web box girder The increment of deflection caused by shear deformation shall be taken into account. This result can provide important reference for engineering design and construction control.