兴教寺玄焋塔抗震性能评估与加固

Strengthen and evaluation of seismic performance of Xuanzang Tower in Xingjiao Temple

为了研究兴教寺玄焋塔的抗震性能,结合已有砖石古塔抗震性能评估方法,建立砖石古塔抗震性能综合评估模型,参考汶川地震中砖石古塔震害结果,确定评估模型中各参数的取值标准。并由考虑土与结构相互作用时砖石古塔的地震反应分析结果,对玄焋塔结构抗震性能进行了评估。评估结果表明:塔体底部、塔身沿竖直方向中轴线、塔檐及塔刹处存在薄弱环节,抗震能力不足,易发生破坏,可采用锚杆或抗滑桩加固地基、底部压力灌浆、各层钢板加箍的抗震加固方案。

In order to study the seismic performance and strengthen method of Xuanzhuang Tower of Xingjiao Temple,in light of seismic performance evaluation method to masonry pagodas,the seismic performance integration evaluation model was set up.The seismic disaster of masonry pagodas in Wenchuan earthquake was referenced,the value standard in the evaluation model was confirmed.And according to seismic response analysis results when soil-structure interaction was considered,the seismic performance of Xuanzhuang Tower was evaluated.The related results indicate that the unsubstantial point lies in the bottom,the vertical axial line,the eave and the top of the tower,where the seismic strength is not adequate and is prone to be destroyed.The subsoil strengthened by anchor or anti-slide pile,grouting injected in the bottom,steel plate hooped in each floor can be adopted to strengthen the tower.