【作者】 杨兵；

【导师】 林拥军；

【作者基本信息】 西南交通大学 ， 建筑与土木工程， 2016， 硕士

【摘要】 针对水平地震作用的随机性、砌体结构自身属性在水平地震作用的过程中会发生改变以及砌体结构墙体受力机制的复杂性,加之现行的构件重要性的研究方法不能完全考虑这些因素的影响,均尚存有一定缺陷。本文采用静力弹塑性分析和动力弹塑性分析方法开展水平地震作用下砌体结构墙体的重要度研究,主要研究内容与成果如下：第一、根据水平地震作用在结构中分配传递模式,提出了与荷载或作用无关的基于结构属性的墙体抗震重要度和与荷载或作用有关的基于静动力弹塑性分析的墙体抗震重要度的定量计算方法。通过模型的计算分析结果对比发现：沿砌体结构房屋竖向从上到下,两者计算的墙体抗压重要度逐渐增大,而抗剪重要度存在较大的随机性,不符合从上到下依次增大的规律。此外,静动力弹塑性分析的结果发现相同楼层抗侧刚度相等的墙体的抗剪重要度并不相等。再有基于结构属性的抗震重要度计算方法的计算精度不高,不能反映相同楼层相同抗侧刚度墙体之间抗震重要度的差异。第二、研究了水平地震作用强度,卓越周期及持续时间对墙体重要度的影响,通过静力弹塑性和动力弹塑性分析方法相互结合,比较不同地震动条件下墙体重要度的差异。第三、研究了不同结构属性(包括几何属性和有无构造柱圈梁)对墙体抗震重要度的影响,比较了不同空间位置和有无构造柱圈梁约束作用的墙体对砌体结构整体抗震性能的影响。得出了不同结构属性的砌体结构墙体的抗震重要度随水平地震作用强度的变化规律,能够反映不同结构性能阶段墙体抗震重要度的差异。本文提出的重要性的分析方法能够适用不同特性的地震动,适用于结构性能的各个阶段。通过计算得出结构中各构件的抗震重要度,能为结构的设计与加固提供一些参考。更多还原

【Abstract】 As a result of the randomness of horizontal seismic effect, the variation of the masonry structure attributes and the complexity of the stress mechanism in masonry structure wall, the current study methods of component importance are still unreasonable. In this dissertation, the static and dynamic elastic-plastic analysis methods are used for the research on the importance of masonry structure wall under horizontal seismic action. The main research contents and results are presented as follows:Firstly, according to the allocation model of horizontal seismic action in structure system, this dissertation proposed two wall anti-seismic importance of quantitative calculation methods. One is based on structure property without external load, another is based on static and dynamic elastic-plastic analysis. By virtue of the analysis results of the finite element models, this dissertation drew a conclusion that the compressive importance of the wall is consistent gradually increases frome up to bottom in the vertical direction of masonry structure, but shearing importance doesn’t meet this rule. In comparision with the merits and demerits of this two methods, the first method does not have high accuracy, and cannot reflect the difference of the anti-seismic importance among wall which are located in the same floor and have the same lateral stiffness. For which the second method is superior to the first one.Secondly, this dissertation carried out some researches on the importance impact factors which included the horizontal seismic action intensity, remarkable period and duration time, and found the wall importance difference between two walls which are under the conditions of different ground motion, taking advantage of the static elastic-plastic and dynamic elastic-plastic analysis methods.Thirdly, this dissertation studied the influence of the structure properties factors that contained geometric properties, constructional column and ring beam on the wall anti-seismic importance and the anti-seismic ability of the masonry structure, and obtained some variation characteristics of the wall anti-seismic importance.In summary, the importance analysis methods In this dissertation is applicable to different characteristics of ground motions and the various stages of the structure the performance, and can provide some references to structural design and reinforcement.更多还原