帶填充墻鋼交錯桁架結構的抗震性能研究
[Abstract]:The cross-section of the structural system of the steel staggered frame structure is small, the effect of the filling wall on the seismic performance of the structure is large, and the relevant research documents have not yet been published. In this paper, the influence of filling wall on the anti-seismic performance of steel staggered frame structure is discussed through theoretical research and numerical analysis, and a simplified analytical model of the filling wall is established by using the equivalent oblique pressure rod, and the periodic reduction coefficient is given. In this paper, the anti-seismic performance and the yield mechanism of the staggered steel frame with filled wall are studied, and the weak rod and weak layer of the structure are pointed out. The anti-seismic measures for improving the longitudinal yield mechanism of the structure and the design suggestions on the seismic structure of the filling wall and the RC floor are put forward. In order to provide the technical reference for the design of the structure system of the steel staggered frame structure in China. The main contents of the study are as follows: (1) Based on the experimental study of the steel frame structure with filled wall, the reliability of the simulation analysis method is verified. Based on the law of the stress distribution of the filling wall under the influence of the horizontal external force, the simplified analytical model for simplifying the filling wall into the RC equivalent oblique pressure rod is established based on the research literature. In this paper, considering the non-linear, geometric non-linear and contact non-linearity of the material, the relationship between the reinforcement and the surface contact between the filling wall and the main structure is simulated, and the numerical simulation of the staggered frame structure with the filling wall is carried out. In this paper, it is proved that the structure non-linear analysis is feasible by using the equivalent oblique compression rod model. (2) The influence of the stiffness of the filling wall is put forward, and the coefficient of the structural period of the steel interlaced frame with the filling wall is taken as the reduction factor. The self-vibration period and the vibration mode of the filling wall to the steel staggered frame structure are studied by modal analysis of a plurality of structural models. The effect of the equivalent oblique compression bar model on the structure of the staggered frame with filled wall steel is tested and the modal analysis is carried out. applicability. (3) The anti-seismic performance of the staggered frame structure with filled wall steel under the action of multiple earthquake is studied, and the seismic strengthening of the bottom of the structure is put forward. In this paper, the finite element model of the structure of a plurality of staggered steel frames with filled wall is established, and the finite element model of the structure of the steel staggered frame is established. The finite element model of the structure of the steel interlaced frame is analyzed, and the finite element model for filling the wall is compared. By means of the analysis of the structural floor, the displacement of the floor, the displacement angle between the layers and the shear of the base, the anti-seismic performance of the structure of the steel staggered frame is affected by the filling wall. The anti-seismic ability and the yield mechanism of the structural system of the staggered frame with filled wall are studied, and the improvement of the structure's longitudinal direction is put forward. In this paper, the relationship between the displacement of the vertex of the structure and the displacement of the anti-seismic target is studied by the power spectrum analysis of the structure, and the seismic resistance to the transverse and longitudinal direction of the structure is studied. The ability of the structural members is evaluated. The design of the relative stiffness of the structural members is reasonable, the overall safety of the structure and the overall plastic deformation ability of the structure are studied, and the distribution of the hinge sequence, the state of the hinge and the plastic hinge is determined according to the plastic hinge of the steel staggered frame structure with the filling wall. The rule and yield mechanism, pointing out the thinness of the structure The support between the columns of the structure is proposed, the rigidity and strength of the bottom steel column are increased, and the structure is effectively improved. (5) The beneficial effect of the filling wall on the seismic performance of the structure is analyzed, and the existing wall-out plane stability in the process of engineering design and construction is combined with the common practice in engineering design and construction practice. The structure of the filling wall and the main body is put forward for the staggered frame structure with the filling wall steel, etc. The design requirement of the seismic structure of RC floor is an important component of the longitudinal connection of the steel staggered frame structure. The influence of the filling wall on the structural stress of the RC floor is analyzed, and the part of the RC floor is reinforced in the structural design.
【學位授予單位】:北京交通大學
【學位級別】:博士
【學位授予年份】:2013
【分類號】:TU352.11
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