索杆肋梁组合楼盖人致振动有限元研究

发布时间：2018-06-20 01:39

本文选题：索杆肋梁组合楼盖 + 人致振动　；参考：《天津大学学报(自然科学与工程技术版)》2017年S1期

【摘要】：索杆肋梁组合楼盖是一种采用拉索通过撑杆支承混凝土肋梁的新型预应力组合楼盖结构,此种结构具有较好的力学性能,可以采用较少材料实现较大跨度.同时,这也使得结构的整体刚度相对较小,在人行荷载激励下,楼盖可能会产生较大的振动.本文采用有限元分析工具MIDAS/GEN,建立了一榀索杆肋梁组合楼盖结构计算模型,研究了结构的自振特性;随后,研究了踏步荷载下结构的加速度响应;最后,对垂度、拉索直径、撑杆直径以及混凝土肋梁梁高这4个参数对人致振动响应的影响规律进行了研究.结果表明,混凝土肋梁梁高和拉索直径对结构加速度的影响最大,其次是撑杆直径,垂度影响最小.
[Abstract]:The cable-beam composite floor structure is a new type of prestressed composite floor structure supported by cables and strands of concrete ribbed beams. This kind of structure has better mechanical properties and can use less materials to realize large span. At the same time, the overall stiffness of the structure is relatively small, and the floor may produce larger vibration under the excitation of walking load. In this paper, the finite element analysis tool Midas / Gen is used to establish a computational model of cable-beam-beam composite floor structure, and the natural vibration characteristics of the structure are studied. Then, the acceleration response of the structure under stepping load is studied, and finally, for the sag, the diameter of the cable, the vibration characteristics of the structure are studied. The influence of four parameters, such as the diameter of brace and the height of concrete ribbed beam, on the response of human induced vibration is studied. The results show that the height of concrete rib beam and the diameter of cable have the greatest influence on the acceleration of the structure, followed by the diameter of the brace and the least influence of the sag.
【作者单位】：石家庄铁道大学土木工程学院;青岛理工大学土木工程学院;北京交通大学交通运输学院;
【基金】：国家自然科学基金资助项目(51208317) 河北省自然科学基金资助项目(E2016210052) 河北省大型基础设施防灾减灾协同创新中心资助项目
【分类号】：TU398.9

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