应县木塔顶-拉复位工艺模型试验研究  

Model experiment study on jacking-tensioning reset technology for the Yingxian Timber Pagoda

作　　者：方应财 袁建力[2] 杨韵[2] 

机构地区：[1]江苏农林职业技术学院风景园林学院,江苏镇江212400 [2]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《建筑结构学报》2015年第10期124-130,共7页Journal of Building Structures

基　　金：国家自然科学基金重点项目(51338001)

摘　　要：针对应县木塔的变形特征和"不落架修复"的工艺要求,提出了变形木构架内部顶-拉的复位方法,设计了逐次复位、一次整体复位以及超目标复位3种施工方案;以木塔严重变形的柱圈层为对象,通过缩尺模型试验,研究了竖向荷载对柱圈层复位的影响、顶-拉复位力系与柱圈层复位的变化规律以及柱圈层复位后的回弹性能。试验结果表明:榫卯节点间的摩阻性能和构件之间的牵连作用是影响柱圈层复位的重要因素;竖向荷载越大,柱圈层需要的复位力越大,但复位力卸除后柱圈层的回弹量较小;在相同的竖向荷载下,逐次复位对柱圈层的损伤较小,复位力卸除后柱圈层的回弹量也小。Aiming at the deformation characteristic and technological requirements of ‘non-disassembly repair ＇of Yingxian Timber Pagoda,the interior ‘jacking-tensioning＇reset method for deformed timber frame was proposed,and three construction schemes including successive reset,one-off overall reset and exceeding target reset were designed.The scaled model experiment based on the serious deformed column circle story of the timber pagoda was implemented to understand the influence of vertical load on the story restoration,the change rule between the story restoration and reset force of jacking-tensioning device,as well as the spring-back performance of the story after the restoration. The test results show that the friction between the mortise-tenon joints and the traction function between timber components are important influence factors to the story restoration. The bigger reset force is needed for the story restoration under bigger vertical load but the spring-back of the story is smaller after the reset force is unloaded. Under the same vertical load,the damage of the story under the successive reset is small,and the spring-back is small after the reset force is unloaded.

关 键 词：古建筑 木构架 复位工艺 静力试验 结构变形 

分 类 号：TU366.203[建筑科学—结构工程]