Shaking Table Tests on Multi-Leaf Stone Masonry Structures: Analysis of Stiffness Decay
Shaking Table Tests on Multi-Leaf Stone Masonry Structures: Analysis of Stiffness Decay
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多层石砌体结构振动台试验：刚度衰减分析
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
C. Modena
中科院分区：
文献类型：
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作者：
N. Mazzon;C. Chavez;M. Valluzzi;F. Casarin;C. Modena
本文讨论了天然水硬性石灰基灌浆对注入多层石砌体构件动力性能的影响。已经对两座石砌建筑进行了振动台实验，在注浆前后进行了测试。本文重点分析了底部和每层记录的加速度和相关位移。这导致评估未强化和注射结构的刚度。增加 PGA 的输入允许研究刚度衰减，模拟结构的逐渐损坏。这些结果还根据计算的频率和振型进行了解释。最后，对所有模型获得的结果进行比较，可以加深对石灰基灌浆注入所产生的影响及其在对受损（修复）或未受损（加固）结构进行干预时改变动态行为的能力的了解。
The influence of the natural hydraulic lime-based grout on the dynamic behaviour of injected multi-leaf stone masonry elements is discussed in the paper. Shaking table experiments on two stone masonry buildings, tested before and after grout injection, have been performed. The paper focuses on the analysis of both the recorded accelerations and related displacements, at the bottom and at each further storey. This leads to evaluate the stiffness of the unstrengthened and injected structures. The input at increasing PGA allowed the stiffness decay to be studied, simulating a gradual damaging of the structures. These results were also interpreted in the light of both computed frequencies and mode shapes. Finally, the comparison among these results, obtained from all the models, allows to deepen the knowledge concerning the effects induced by the lime-based grout injection and on its capability to modify the dynamic behaviour, when intervening on a damaged (repairing) or on an undamaged (strengthening) structure.