【作者】 卜良桃；

【导师】 尚守平； 黄纲；

【作者基本信息】 湖南大学 ， 建筑与土木工程， 2001， 硕士

【摘要】 本文结合商开高速公路跨陇海铁路和跨京九铁路处的两座多跨拼接连续刚构桥，完成了本文的专题研究。通过现场测试、模型和试块的模拟振动成型试验、加载破坏试验、理论分析、现场减振隔振试验、施工工艺和质量控制等一系列全面、系统的研究工作，认真、深入地研究了现浇混凝土受火车行驶振动的影响，特别是在约束构件后浇湿接头区段内现浇混凝土受火车行驶振动影响研究方面作出了开创性的工作，完成了振动使湿接头区段受到弯曲变形影响条件下的构件模拟振动试验、抗剪强度试验。在一定的振幅范围内，对混凝土强度没有不利影响，当激振频率在40Hz以下，最大竖向位移振幅在0.2mm以内，受振与非振构件相比较，其破坏荷载值没有降低。混凝土立方体试块的试验表明，最大竖向位移振幅在2mm以内，受振构件强度比非振构件强度提高20％左右。试验表明振动持续时间从12小时到72小时的变化，对混凝土强度没有明显差别；湿接头的界面是最薄弱部位是施工质量控制的重点，振动构件模板应做到务必不漏浆；当振动幅值较大，必须采取隔振、减振措施。更多还原

【Abstract】 Postgraduate: Pu liangtao Supervisor: professor Shang shouing Senior engineer Huang gangThe research on influence of the post-casting section of continuous rigid bridge suffered vibration of train travelling is preseated in this thesis according to related project. Based on theorize analysis, expriments of material properties and members under deformed vibration, verification of isolating and reducing vibration in building as well as construction technology and quality control, the effect of post-casting section suffered deformed vibration is studied thoroughly. Through the analysis of 28 tests of shear strength with post-casting section under deformed vibration, the related laws are deduced .And the analysis of finite element method, the studies of quality control and construction technology are also completed. No bad effect on concrete strength is found within a certain range of amplitude. The ultimate loads of vibration members are not lower than those of normal ones am, when vibration frequency is below 40Hz and maximum vertical displacement is within 0.2mm. In the same condition, the tests of concrete cube show that the strengths of vibration members are about 20 percent higher than those of normal ones. As the Concrete members are vibrated from 12 to 72 hours, the difference of its strength between vibration members and normal ones is not obvious. The interface of post-casting section is both the most dangerous position of the structure and focal point of quality control. In addition, the leaking of cement paste out of the formwork of vibration member is of no permission. The effective measure of insulating and reducing of vibration must be applied. In real project, successful application of the research results is obtained.更多还原