形状记忆合金橡胶对高架桥梁碰撞减震效果的试验研究

发布时间：2018-01-10 18:04

本文关键词：形状记忆合金橡胶对高架桥梁碰撞减震效果的试验研究　出处：《防灾减灾工程学报》2014年05期 　论文类型：期刊论文

【摘要】：地震作用下,高架桥梁相邻主梁间的碰撞会引起结构位移和加速度响应增大、应力提高,导致混凝土开裂、脱落和伸缩缝被挤压破坏,甚至引发桥梁落梁和倒塌等,因此采取减轻或者避免桥梁结构在地震作用下碰撞的措施显得尤为必要。设计制备了具有变形自恢复能力的形状记忆合金橡胶碰撞缓冲器,通过桥梁地震碰撞的振动台试验,研究了形状记忆合金橡胶缓冲器对桥梁碰撞的控制效果,提出了碰撞缓冲器吸能效率和结构自身耗能控制率指标。研究表明,形状记忆合金橡胶碰撞缓冲器具有稳定的吸能效率,能够大幅度降低桥梁结构碰撞加速度和碰撞力,这对于提高城市交通网络的地震安全性能具有重要意义。
[Abstract]:Under the action of earthquake, the collision between adjacent main beams of elevated bridge will lead to the increase of structural displacement and acceleration response, the increase of stress, the cracking of concrete, the breakage of shedding and the destruction of expansion joints. Even causes the bridge to fall the beam and the collapse and so on. Therefore, it is particularly necessary to take measures to mitigate or avoid the impact of bridge structures under earthquake. A shape memory alloy rubber impact buffer with the ability of self-restoring deformation is designed and fabricated. The control effect of shape memory alloy rubber buffer on bridge impact was studied by shaking table test of bridge seismic impact. The energy absorption efficiency of impact buffer and the control rate of energy consumption of structure were proposed. The shape memory alloy rubber impact buffer has stable energy absorption efficiency and can greatly reduce the impact acceleration and collision force of bridge structure. It is of great significance to improve the seismic safety performance of urban traffic network.
【作者单位】：哈尔滨工业大学土木工程学院;
【基金】：国家科技支撑计划项目(2011BAK02B00) 国家优秀青年科学基金项目(51222808) 中央高校基本科研业务费专项资金(HIT.NSRIF.2014105)资助
【分类号】：U442.55
【正文快照】： 引言地震作用下,建筑结构和高架桥梁的碰撞主要发生在抗震缝或伸缩缝处,相邻结构间的碰撞会引发结构位移和加速度响应增大、应力提高,引起混凝土开裂、脱落和伸缩缝挤压破坏,甚至导致桥梁结构的落梁和倒塌等。目前所采取的降低碰撞对桥梁地震反应不利影响的措施主要是在桥梁结

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