西安小雁塔结构振动控制试验研究

发布时间：2018-11-03 10:43

【摘要】：为了减小地震对小雁塔结构的影响,利用形状记忆合金(SMA)的超弹性,结合悬摆减震理论,研发了形状记忆合金复合悬摆减震系统(SMA-SPDS),对该减震系统进行了振动台试验,探讨了SMA-SPDS的工作性能和有效性;设计并制作一个1/10的小雁塔结构缩尺模型,并将SMA-SPDS分别设置于小雁塔模型结构中进行模拟地震振动台试验,得到了设置与未设置SMA-SPDS的小雁塔模型结构的地震响应,对比分析了SMA-SPDS的减震效果。结果表明:研发的SMA-SPDS系统性能稳定,便于集成,减震效果明显,能够较好满足古塔结构的减震需求;设置SMA-SPDS后,可以明显地改变塔体结构变形规律,模型结构各点的位移响应均明显降低,特别是塔体顶部效果明显,一般情况下可减小30%;试验结果还表明,地震作用越强烈,SMA-SPDS的减震效果越明显,研发的SMA-SPDS是一种能够有效减小古塔结构地震响应的新型减震系统,对砖石古塔结构的消能减震保护具有参考价值。
[Abstract]:In order to reduce the influence of earthquake on the structure of small wild goose pagoda, a shape memory alloy composite pendulum damping system (SMA-SPDS) was developed by using the hyperelastic shape memory alloy (SMA) and the theory of suspension damping. The vibration table test of the system is carried out, and the performance and effectiveness of SMA-SPDS are discussed. A scale model of a 1 / 10 small goose pagoda structure is designed and made, and the SMA-SPDS is set in the small goose pagoda model structure to carry out the simulated seismic shaking table test, and the seismic response of the small goose pagoda model structure with and without SMA-SPDS is obtained. The shock absorption effect of SMA-SPDS is compared and analyzed. The results show that the developed SMA-SPDS system has the advantages of stable performance, easy integration, obvious shock absorption effect, and can meet the needs of the ancient pagoda structure. After setting SMA-SPDS, the deformation law of tower structure can be obviously changed, and the displacement response of each point of the model structure is obviously reduced, especially the effect on the top of the tower is obvious, and in general, the displacement response of the tower structure can be reduced by 30%. The experimental results also show that the stronger the earthquake action, the more obvious the seismic absorption effect of SMA-SPDS is. The developed SMA-SPDS is a new type of damping system which can effectively reduce the seismic response of ancient pagoda structures. It has reference value for energy dissipation and protection of masonry pagoda structure.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金(51178388;51108035) 国家重点实验室开放项目(08KF02) 陕西省工业攻关项目(2014K06-34) 西安建筑科技大学创新团队资助项目
【分类号】：TU317

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