Stability Analysis Of Masonry Pylon Structure In Loess Area Under Tilted Condition

Ancient masonry pagoda with a large,high center of gravity,poor ductility and other characteristics of the tilt caused by uneven settlement is particularly sensitive.Among them,due to disturbances of the environment,causing local failure,soil bearing capacity reduction and so on to the ancient tower tilt and even damage to the loess area is particularly common.The inclination of the tower body causes the stress of the central axis,the compressive stress of the bottom section and the stress concentration caused by the opening and the stress of the foundation,and so on.Therefore,to identify the foundation failure caused by the overall instability of the tower,the shear stress on the axis of the development of the tower caused by instability,compressive stress and shear stress in the dangerous section caused by damage,weaken the tower bearing capacity,is to protect the tilt masonry tower structure safe Key issues.In this paper,the main factors and the mechanism of the three types of instability problems in the masonry tower are analyzed by means of numerical simulation.Potential Safety Factors and Their Mechanisms in Tilting State.The main contents of the thesis include:(1)The causes of the tilt of the ancient masonry pagoda and the inclination of the pagoda are analyzed.The influence of the inclination on the stability of the tower is pointed out,and the failure form of the pagoda is summarized.(2)Based on the analysis model of tower-foundation-foundation interaction,the variation of stress state,foundation stress and stiffness of tower body under inclined condition are analyzed.(3)Analyze the failure mechanism of masonry piles in the loess area under the inclined condition,and summarize the damage of the tower structure itself and the damage of the foundation.(4)The local failure of the foundation is selected,the compressive stress of the bottom of the tower is broken,and the shear failure of the tower is taken as the three main influencing factors.The finite element model of the initial tilt angle is established by using the tilt angle of the ancient tower as the variable,The variation law and the mechanism of the three kinds of tilting state are analyzed.