Taiyuan University of Technology
Shanxi Natural Science Foundation
In this paper, the failure mode and damage of pagoda on Shan Xi Jiwang Mountain under different earthquakes are calculated and analyzed by numerical analysis method, which provides the basis for seismic reinforcement for Jiwang pagoda. The plastic damage constitutive model is applied to describe the damage failure of masonry structure under earthquake. The displacement form of pagoda under multiple amplitude-modulated seismic waves is given. The seismic responses of interlayer displacement and dynamic amplification factor are obtained, and the seismic damage distribution is discussed. The results show that the overall stiffness of pagoda on Jiwang Mountain is uniform, and the acceleration amplification factor at the top pagoda is the largest. Although the bottom wall of the pagoda is thicker than that on top, the tensile damage is still initiated from the bottom under earthquake, and it expands upward with the increase of seismic intensity. The stress contours show that the maximum principal tensile stress area at the bottom of the pagoda under earthquake expands obliquely, which is easy to form oblique cracks. The weak layers of the pagoda is the bottom three layers and the top layer.