龙溪塔整体平移过程中新型防倾覆系统分析  

Analysis on a new overturn-preventing system in the monolithic movement process of Longxi Pagoda

作　　者：商冬凡[1,2] 王铁成[1] 杨志锋[3] 卢明[3] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]河北省建筑科学研究院,石家庄050021 [3]河北建研科技有限公司,石家庄050021

出　　处：《建筑结构》2016年第5期97-101,共5页Building Structure

基　　金：河北省科技计划项目(13255801D)

摘　　要：龙溪塔为七层六边形砖木混合结构,因其西侧水阳江需拓宽治理,决定将其向东北方向平移129m进行保护,对平移过程中采用的由下部钢筋混凝土保护筒和上部钢结构主动施力支撑组成的新型防倾覆系统设计进行详细介绍,并采用ANSYS软件进行有限元分析。结果表明,增设防倾覆系统后,在总重仅增加10%的情况下,抗倾覆安全系数K提高3.0倍,主体结构顶点位移下降54%,避免了塔身拉应力破坏;新型防倾覆系统与塔体采用可拆除柔性连接,既能保证塔体移位过程安全,又能保留塔体原有历史外观,其成果适用于古塔等高耸建筑的平移工程。Longxi Pagoda is a seven-story hexagonal brick and wood composite structure. Because of the need to broaden the Shuiyang river located on the west side of Longxi Pagoda, it needs to move the pagoda of 129m in northeast direction for protection. A detailed introduction was conducted of a new overturn-preventing system during monolithic movement process. The system was composed of bottom reinforced concrete protective tube and top initiative steel structure support. ANSYS software was used to conduct finite element analysis. The results show that after the addition of the overturn-preventing system, the overturn-preventing safety factor K is increased by 3.0 times and the displacement of the vertex is decreased by 54% with only 10% increase in the total weight, avoiding the tensile stress destruction of the pagoda. The removed flexible connection between the pagoda and the new overturn-preventing system can ensure the security during the movement process and preserve the original historical appearance of the pagoda. The results can be applied to movement projects of high-rise buildings such as ancient pagodas.

关 键 词：古塔 整体平移 钢结构主动施力支撑 钢筋混凝土保护筒 倾覆 

分 类 号：TU318[建筑科学—结构工程]