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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。
In order to develop a low-cost seismic isolation technology for low-rise masonry buildings in villages and towns, a glass bead-graphite foundation sliding isolation system is proposed. The isolation system consists of upper and lower base beams, glass bead- According to the force demand, mortar bars can be set up between the upper and lower foundation beams to realize the effective control of the starting load of foundation slip in different area of intensity. Four different configurations of glass beads - graphite base sliding masonry wall specimens under low cyclic loading tests were carried out. Based on the experiments, the performance of glass bead - graphite base sliding isolation system was analyzed. The mortar rod control Function, wall slipping hysteresis, working performance of limit device, wall bearing capacity and failure characteristics. The results show that the performance of the glass bead-graphite sliding base isolation system is good, which can significantly reduce the earthquake effect on the upper masonry structure. Adding mortar bars to the seismic isolation system increases the sliding start-up load of the isolation system, Which can effectively control the slipping start-up load. The limiting device can effectively limit the sliding displacement. At the same time, the steel rod has enough strength to prevent the superstructure from displacing too much. When the limit sliding displacement is reached, Weeks repeated load applied, the specimen wall damage and damage the process of destruction of the form and seismic wall similar. Glass beads - graphite base slippery shock-absorbing masonry structure, suitable for low-rise buildings in villages and towns isolation design.