Experimental investigation of a novel class of self-centring spinal rocking column
Experimental investigation of a novel class of self-centring spinal rocking column
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DOI：
10.1016/j.jsv.2018.08.034
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发表时间：
2018-12
影响因子：
4.7
通讯作者：
M. Kashani;A. Gonzalez-Buelga;Rachael P. Thayalan;Alistair R. Thomas;N. Alexander
中科院分区：
文献类型：
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作者：
M. Kashani;A. Gonzalez-Buelga;Rachael P. Thayalan;Alistair R. Thomas;N. Alexander
本文探讨了自定心脊柱概念的实验证明。该系统的设计灵感来自于人体脊柱中椎骨和椎间盘的机械相互作用。进行了试验试验，以探索是否可以以同样有效的方式建造类似的桥墩系统来承受地震动力荷载。实验是在捆绑（预张紧）木块（椎骨）上进行的，椎骨之间有或没有橡胶条作为椎间盘。采用小型振动台对小型试件进行正弦激励，并通过连接在结构上的三轴加速度计记录系统的响应。研究了系统在正弦动力激励下的非线性动力响应和力学特性。研究发现，将椎间橡胶盘集成到木制椎体中，降低了系统的非线性，增加了系统的柔韧性和阻尼。实验结果表明，该系统能承受较大的侧向位移，且激励后无残余变形。
This paper explores a proof of concept self-centring spinal column concept experimentally. The idea of the system is inspired by the mechanical interaction of the vertebral bones and intervertebral discs in human spine. Experimental tests are undertaken to explore whether a similar bridge pier system could be constructed to withstand seismic dynamic loading in an equally efficient manner. The experimentation is performed on tied (pre-tensioned) wooden blocks (vertebrae) with and without rubber strips between the vertebrae acting as the intervertebral discs. Small-scale test specimens are excited sinusoidally using a small-scale shake table, and the response of the system recorded through triaxial accelerometers attached to the structure. The nonlinear dynamic response and mechanics of the system are then investigated under sinusoidal dynamic excitation. It is found that the integration of intervertebral rubber discs into wooden vertebrae reduces the nonlinearity of the system, and increases the flexibility and damping. The experimental results show that the proposed system can sustain large lateral displacement without any residual deformation after the excitation.