基础刚度对砖石古塔受力机理影响研究

以西安万寿寺塔纠偏工程为研究背景,对纠偏加固后的砖石古塔的在不同基础刚度条件下的受力机理分析.分别建立增加圈梁、圈梁-地梁组合以及圈梁-地梁-托盘组合模型下的塔体与基础协同工作模型.通过数值计算对比分析基础刚度改变引起的塔体受力的变化;同时探讨基础刚度对塔体动力特性的影响.结果表明:基础刚度增大,塔体应力随之削弱,改善了塔体静力作用下的受力状态和稳定性;基础刚度增大,塔体的自振频率增大,基础刚度变化对高阶振型影响较为明显.

Research on Foundation Stiffness Affects the StressMechanism of Ancient Masonry Pagoda Structure

The paper takes Wanshou Temp Pagoda as an object of study. It is the study about the mechanism of the rectification and reinforced the masonry pagodas in different stiffness foundation. Tower with foundation is established collaborative working analysis model by adding the ring beam, the combination of ring beams with ground beams, and the concrete pallet respectively. The numerical computation compares and analyzes the variation of three foundation stiffness caused by changes in the force, Also discussed the impact of the foundation stiffness on the dynamic characteristics of the tower, The results show that foundation stiffness increases, the stress of the tower consequent weaken, the stress state and the stability of the tower under static loads has improved; foundation stiffness increases, the tower body vibration frequency increases, changes of foundation stiffness is more obvious to the high vibration mode.