大跨度预应力加劲式组合梁楼盖动力响应研究

发布时间：2018-01-12 16:40

本文关键词：大跨度预应力加劲式组合梁楼盖动力响应研究　出处：《安徽理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：大跨度预应力加劲式组合梁楼盖体系是在组合梁和预应力结构理论基础上提出的新型楼盖体系。该类楼盖是使用钢管作为骨架,可以有效减少钢材用量;同时对组合楼盖施加预应力,有效减小截面尺寸,降低楼盖自重,可以更好适应大跨度工程施工及承载,能充分发挥组合材料物理力学特性的要求,为楼盖的推广应用奠定基础。论文基于理论分析和数值模拟对楼盖进行研究,主要内容为:基于荷载平衡法,研究大跨度预应力组合梁楼盖的张拉控制力,并确立结构分析参数,为动力响应分析奠定了基础;基于拟板法基本原理,理论推导了肋梁楼盖动力响应计算公式,研究该结构动力响应,确定楼盖动力响应特征值;基于大型有限元分析软件ANS YS,对楼盖进行实体建模,并对楼盖的动力特性做了分析,通过改变偏心距(即预应力筋施加位置)、楼盖板厚及肋梁高度等进行参数讨论,并将有限元结果和理论结果进行了对比分析,验证了有限元简化模型的合理性;基于简化的有限元模型,利用时程分析法,研究了有无预应力钢桁架对楼盖地震动力响应的影响以及预应力布置方式对楼盖地震动力响应的影响。研究结果表明,该组合楼盖具有较好的承载性能和抗震性,舒适度也满足日常使用要求。其中肋梁高度对楼盖基频影响较大,预应力筋布置位置对楼盖地震动力响应影响明显,因此在结构设计中应着重考虑。
[Abstract]:Large span prestressed reinforced composite girder floor system is a new type of floor system proposed in the composite beam and prestressed structure based on the theory. The floor is used as steel skeleton, can effectively reduce the amount of steel; at the same time of prestressed concrete composite slabs, effectively reduce the section size, reduce structural weight, and can better adapt to the big load the span of engineering construction, and give full play to the physical and mechanical properties of the composite materials, lay the foundation for the popularization and application of the floor. The floor of the simulation based on theoretical analysis and numerical, the main contents are as follows: the load balance method based on the research of large span prestressed composite beam slab tension control, and establishes the structure parameters analysis, lay the foundation for dynamic response analysis; quasi principle based on the method, the theoretical calculation formula of dynamic response of rib beam floor is deduced, the structure dynamic response, To determine the floor characteristic values of dynamic response; finite element analysis software ANS YS based on the solid modeling of the dynamic characteristics of the floor slab, and do the analysis, by changing the eccentricity (i.e. tendons applied position), floor plate thickness and beam height parameter were discussed, and the finite element results and theoretical results through comparative analysis, verify the rationality of the simplified finite element model; simplified finite element model based on the time history analysis method, study the effect of prestressed steel truss on floor and seismic response of prestressed arrangement on seismic response floor. The results showed that the composite floor has bearing capability and good resistance, comfort to meet the daily requirements. The rib beam height on the fundamental frequency influence, layout of prestressing tendons on seismic dynamic response of floor effect Therefore, it should be considered in the structure design.

【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9;TU311.3

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