论文标题:形状记忆合金阻尼器在某古塔抗震加固中的研究与应用
Study and Application of Shape Memory Alloys (SMA) Dampers in the Earthquake Resistant and Strengthening of the Ancient Tower
论文作者
论文导师 王社良；苏三庆,论文学位 硕士,论文专业 防灾减灾工程及防护工程
论文单位 西安建筑科技大学,点击次数 725,论文页数 79页File Size5014k
2006-03-01论文网 http://www.lw23.com/lunwen_83447/
shape memory alloy (SMA);damper;performance test;ancient tower;structure with energy dissipaters;constitutional relationship;hysteretic curve
作为一种新型的功能材料,形状记忆合金在工程结构中有着良好的应用前景,也为结构振动控制技术提供了一个新途径。因此,研究SMA阻尼器及其在结构振动控制的应用进行研究,具有重要的理论意义和应用前景。 本文以古塔建筑为背景,结合形状记忆合金在结构振动控制中的研究和应用现状,采用理论分析、试验研究和计算机模拟相结合的方法对形状记忆合金阻尼器在某古塔抗震加固中的应用进行了研究。文中首先对形状记忆合金在结构振动控制中的研究与应用现状进行了回顾和总结;其次对一种NiTi奥氏体超弹性形状记忆合金丝进行了材料性能试验,考察了这种记忆合金丝的超弹性耗能能力,同时分析了应变幅值,加载频率,循环次数以及工作温度等对其工作性能的影响;在此试验基础上,从形状记忆合金的本构关系入手,设计了一种单拉式形状记忆合金被动耗能阻尼器,建立了这种阻尼器的理论模型,接着通过计算机模拟了该阻尼器的滞回曲线;然后对本文的背景工程,即广州光塔进行了静动力分析,并将本文设计的SMA阻尼器应用于该塔,分析了其控制效果和规律,结果表明,本文所设计的SMA阻尼器可有效减小结构的地震响应,在同类古塔的抗震加固中有着很好的应用前景;最后论文还对SMA耗能减震结构的设计原则和方法进行了初步分析和探讨。
Being a new material, Shape Memory Alloys (SMA) has a good application prospect in structure engineering;it also offers a new approach for the structure vibration control. Hence, the study on the SMA dampers and the structure vibration control with these dampers has considerable value.This thesis presents a study and analysis of SMA damper and its application forearthquake resistant and strengthening of the ancient tower through theory analysis,experiment study and computer simulation, referring to the study and application of SMA instructure vibration control. First, the study and application of SMA in structure vibrationcontrol are reviewed and summarized. The following is the material performance tests of akind of austenitic superelastic NiTi shape memory alloy wire. The energy dissipationcapability of the wire and the influence of strain amplitude, loading frequency, as well asnumber of cycles on working performance of the SMA wire and so on are investigated. Basedon the test, the writer designs a tensioned SMA damper, sets up its theoretical modelaccording to the constitutional relationship of SMA, and gets its hysteretic curve throughfinite element computer simulation. Then this paper"s background project-Guangzhou GuangTower is analyzed in static and dynamic state, especially the control effectiveness by applyingSMA dampers to this tower. It is shown that this type of SMA damper developed in thisproject is very effective to mitigate earthquake responses of structures and has a goodapplication prospect in the earthquake resistant and strengthening of the the similar antienttower. Finally the seismic design principles and methods for structure with energy dissipaters are studied initially.
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