某古砖塔修缮前后受力性能分析研究

Analysis and Research on the Stress Performance of an Old Brick Tower

以某古砖塔为例,首先介绍了古砖塔修缮前病害状况及其对应的修缮措施,然后应用大型有限元分析软件Ansys,建立了砖塔的三维实体有限元分析模型,对该塔进行了静力分析,并采用分块兰索斯(Block Lanczos)分析方法,对古塔进行模态分析,以求解古塔的自振周期和振型;运用地震反应谱分析法对古砖塔进行了地震响应分析;最后利用列表的形式对古砖塔修缮前后的最大应力、周期及其相应的空间振型、位移进行对比分析,从而对砖塔做出了全面的受力性能评估,亦可对同类古砖塔的保护修缮提供一定的借鉴.

Taking the ancient brick tower as an example, we firstly introduce the ancient brick tower repairment before the disease condition and their corresponding repairing measures, then use large-scale finite element anal- ysis software ANSYS to establish the finite element analysis of brick tower of the three-dimensional entity model, and adopt the Block Lanczos analysis method. Modal analysis was carried out on the ancient towers to solve the natural vibration period and vibration mode of the ancient pagoda; Seismic response analysis was performed by seismic response spectrum analysis. Finally using a list of of maximum stress, cycle and its corresponding space mode and displacement were analyzed. It helped to make the comprehensive mechanical performance evaluation, which can provide certain reference for similar ancient brick tower protection repairment.