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地裂缝作为一种典型的地质灾害会导致桥跨结构及桥梁附属设施的变位与破坏,缩短桥梁的使用寿命。通过在试验场地进行的桥梁跨越地裂缝结构模型试验,利用沉降平台模拟地裂缝活动,探讨了地裂缝影响下的桥梁灾变机理,采用ANSYS有限元软件对地裂缝作用下的桥梁的受力及变形情况进行数值模拟,并与模型试验结果进行对比,确定了地裂缝作用下应力应变特征及受力模式,为地裂缝作用下桥梁结构设计提供了科学依据。
As a typical geological disasters, ground fissures will lead to the displacement and destruction of bridge structures and bridges ancillary facilities, and shorten the service life of bridges. Through the model test of the bridge across the ground fissure in the test site, the settlement platform is used to simulate the ground fissure activity, the bridge disaster mechanism under the influence of ground fissure is discussed, and the stress and deformation of the bridge under the action of ground fissure are analyzed by ANSYS finite element software The numerical simulation is carried out and compared with the model test results to determine the stress-strain characteristics and stress modes under the action of ground fissures. This provides a scientific basis for the design of bridge structures under the influence of ground fissures.