Seismic response and damage analysis of brick Shengshou Pagoda of Tang dynasty
To study the response and damage mechanism of Shengshou Pagoda under the earthquake and carry out its seismic protection,the numerical model of the pagoda was established by the finite element software ABAQUS with a layered modelling,and its dynamic characteristics were calculated.El-Centro wave,Taft wave and Lanzhou artificial wave were input to obtain the structure's acceleration amplification coefficient,inter-story displacement and inter-story displacement angle by calculating the pagoda's seismic response,and the distribution law of seismic damage of the construction was analyzed.The results show that the acceleration amplification effect at the top of the pagoda is the most significant,the horizontal inter-story displacement angle is the largest,and the early plastic deformation of the structure's upper part leads to its cracking and failure.The earthquake damage at the bottom of the pagoda is apparent,the first floor is the weak part of the structure,and the mortar joints cracked earlier than the block and extended upward layer by layer.The pagoda eaves are damaged in tension before the tower,and the damaged area spreads from the middle of the pagoda eaves to the four corners.The study results provide a basis for the seismic capacity assessment of Shengshou Pagoda and lay foundation for its seismic protection.And this research method can also provide reference for other masonry towers.
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