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首页> 外文会议>ASME(American Society of Mechanical Engineers)/JSME Pressure Vessels and Piping Conference: Seismic Engineering v.2; 20040725-20040729; San Diego,CA; US >Survey of Aging for LRB of a Base-isolated Building Completed 15 Years Ago
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Survey of Aging for LRB of a Base-isolated Building Completed 15 Years Ago

机译：一座完成15年的基础隔离式建筑的LRB老化调查

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摘要

We researched aging of the LRB (Lead Rubber Bearing) installed in a base-isolated building which was constructed 15 years ago. The hardness of the cover rubber and the height were measured for 35 LRBs which were installed in the building. The compression test and combined compression shear test with monitor samples and actually installed LRB were performed to search changes in their hysteresis characteristics. The monitor samples were composed of 4 LRBs and 1 RB. Main results obtained were as follows: 1) The LRBs installed in the TC building crept approximately 1 (mm) during 15 years and did not changed during last 5 years. 2) The hardness of the cover rubber did not change against that of 15 years ago. 3) From the testing of the monitor samples, the compression stiffness increased approximately 17% and the shear stiffness increased approximately 5%, however the yield force changed quite a little during 15 years on average. As a result, the suitability of the design specifica-tions of the LRB was confirmed.
机译：我们研究了安装在15年前建造的基础隔离建筑物中的LRB（铅橡胶轴承）的老化。测量了安装在建筑物中的35个LRB的覆盖橡胶的硬度和高度。进行压缩测试和结​​合监控样品和实际安装的LRB的组合压缩剪切测试，以搜索其磁滞特性的变化。监测样本由4个LRB和1个RB组成。获得的主要结果如下：1）安装在TC大楼中的LRB在15年中大约蠕变了1（mm），在最近5年中没有变化。 2）覆盖橡胶的硬度与15年前相比没有变化。 3）从监测样品的测试中，抗压刚度增加了约17％，抗剪刚度增加了约5％，但是屈服力平均在15年内变化很小。结果，证实了LRB的设计规范的适用性。

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