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玻璃珠-石墨基础滑移隔震砌体结构工作性能试验研究

DOI: 10.13577/j.jnd.2015.0505, PP. 37-46

Keywords: 玻璃珠-石墨滑移层,基础滑移隔震,砌体墙,工作性能,试验研究

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Abstract:

为发展村镇地区低层砌体房屋的低成本隔震技术,提出了一种玻璃珠-石墨基础滑移隔震系统,该隔震系统由上下基础梁、玻璃珠-石墨滑移隔震层、上下基础梁间限位装置构成,根据受力需要,可在上下基础梁间设置砂浆棒,以实现对不同烈度区基础滑移启动荷载的有效控制。进行了4个不同构造的玻璃珠-石墨基础滑移隔震砌体墙试件的低周反复荷载试验,基于试验,分析了玻璃珠-石墨基础滑移隔震系统的工作性能、砂浆棒控制作用、墙体滑移滞回性能、限位装置工作性能、墙体承载力和破坏特征。研究表明:玻璃珠-石墨基础滑移隔震系统工作性能良好,能显著减小上部砌体结构所受的地震作用;在隔震系统中加入砂浆棒提高了隔震系统的滑移启动荷载,实现了对滑移启动荷载的有效控制;限位装置可有效地限制滑动位移,同时在大震下限位钢杆有足够的强度,防止上部结构位移过大;达到极限滑动位移后,随着低周反复荷载的继续施加,试件墙体的损伤破坏过程及破坏形态与抗震墙体类似。玻璃珠-石墨基础滑移隔震砌体结构,适于村镇低层房屋隔震设计。

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