【摘要】：近年來,我國地震頻發(fā),磚砌體房屋在地震中破壞嚴重,引起學者們的廣泛關注。本文以帶圈梁構造柱的磚砌體結構為研究對象,通過對一個縮尺比例為1/2的2層磚砌體結構模型進行擬靜力試驗,分析結構抗震性能,并采用有限元方法對磚砌體模型進行P-A分析,定量研究約束砌體結構承載力和延性性能的影響因素,為我國砌體結構設計提供參考。論文主要完成了以下三個方面的工作:(1)設計和制作縮尺比例為1/2的2層磚砌體結構模型,分析在低周往復加載下結構的破壞特征、構造柱縱筋的應變、滯回性能、耗能能力及骨架曲線等方面,評價結構的抗震性能。(2)采用ABAQUS建立試驗模型的非線性空間數(shù)值模型,并對其進行P-△模擬加載,模擬結果與試驗結果吻合較好,證明該有限元方法的有效性和合理性。(3)在試驗數(shù)值模型的基礎上,改變層數(shù)、樓層構造柱率、樓層墻率、層高等因素,研究各因素對磚砌體結構模型進行承載力和延性的影響,得到隨墻率和構造柱的增大,模型承載力增大,而隨著層數(shù)和層高的增大,承載力反而減小;墻率、層數(shù)、層高的變化與延性的延性變化呈負相關的關系,而構造柱率變化與延性變化呈正相關的關系;接著以一個兩層砌體結構房屋為例,定量研究層數(shù)、樓層構造柱率、樓層墻率、層高等參數(shù)變化對砌體結構延性的影響,得到樓層墻率變化對延性系數(shù)變化影響最大,樓層構造柱率和層高變化次之,層數(shù)變化對延性系數(shù)變化的影響最小。
[Abstract]:In recent years, earthquakes occur frequently in our country, and brick masonry buildings are seriously damaged in earthquakes, which has attracted wide attention of scholars. This paper takes the brick masonry structure with ring beam structure column as the research object. Through the pseudo-static test of a two-story brick masonry structure model with a scale of 1 ~ 2, the seismic performance of the structure is analyzed. The influence factors of bearing capacity and ductility of confined masonry structure are quantitatively studied by using finite element method (FEM) to analyze brick masonry model in order to provide reference for the design of masonry structure in China. The main work of this paper is as follows: (1) designing and making a two-story brick masonry structure model with scale of 1 ~ 2, analyzing the failure characteristics of the structure under low cycle reciprocating loading, strain and hysteretic behavior of the longitudinal reinforcement of the structural column, and so on. The energy dissipation capacity and skeleton curve are used to evaluate the seismic performance of the structure. (2) the nonlinear spatial numerical model of the experimental model is established by using ABAQUS, and the simulation results are in good agreement with the experimental results, and the simulation results are in good agreement with the experimental results. The validity and rationality of the finite element method are proved. (3) on the basis of the experimental numerical model, the factors such as the number of floors, the ratio of floor structure columns, the ratio of floor wall, the height of story, etc., are changed. The influence of various factors on the bearing capacity and ductility of brick masonry structure model is studied. The results show that with the increase of wall ratio and structural column, the bearing capacity of the model increases, but with the increase of story number and height, the bearing capacity of the model decreases. The change of wall ratio, layer number and layer height has a negative correlation with ductility change, while the change of structural column rate has a positive correlation with ductility change. Then, taking a two-story masonry building as an example, the influence of the number of floors, the ratio of floor structural columns, the ratio of floor wall and the height of floor on the ductility of masonry structure is studied quantitatively. The results show that the change of floor wall ratio has the greatest influence on the ductility coefficient of masonry structure. The change of floor structure column ratio and floor height is the second, and the change of story number has the least effect on the change of ductility coefficient.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU352.11;TU364

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