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首页> 外文期刊>Journal of Constructional Steel Research >Concept and hysteretic behavior studies of TWIP steel made metallic energy dissipater
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Concept and hysteretic behavior studies of TWIP steel made metallic energy dissipater

机译：TWIP钢制金属能量消散器的概念和滞回行为研究

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Metallic energy dissipaters with good hysteretic performance and high low-cycle fatigue performance are the ideal devices to absorb seismic energy induced in buildings. Generally, two factors domain the performance of axial yielding energy dissipater, which are the configurations and material it adopts. This paper works on those two factors to develop a high-performance metallic energy dissipater. A novel energy dissipater that uses steel tubes as the buckling restrainer is proposed in this paper, furthermore, the twinning-introduced plasticity (TWIP) steel is used to fabricate the key component of the dissipater, the inner rod, because of its exceptional mechanical property. Experimental tests are conducted on a series of 9 specimens that differ in their geometrical length and loading pattern. Test results indicate that all specimens possess satisfying hysteretic behavior, and the low-cycle fatigue performance of this dissipater is better than that of conventional mild steel made ones. Under compressive load, the inner rod forms helical deformation mode whereas deforms uniformly in longitudinal direction under tensile load, and therefore no necking is observed after tests. Basic mechanical properties including the hardening behavior and compressive strength adjustment behavior are investigated quantitatively. A hysteretic model considering the stress hardening property and frictional forces is developed for this dissipater, and good agreement with experimental data is obtained. Finally, deformation pattern and contact evolution of the inner rod are discussed in detail via numerical model.
机译：具有良好滞后性能和高低循环疲劳性能的金属能量耗散剂是吸收建筑物中造成地震能量的理想设备。通常，两个因素结构域轴向产生能量消散剂的性能，这是它采用的构造和材料。本文有助于开发高性能金属能量消散器的两种因素。本文提出了一种使用钢管作为屈曲抑制器作为屈曲抑制器的新型能量散热器，此外，由于其特殊的机械性能，使用孪晶引入的可塑性（TWIP）钢制成散热物，内棒的关键部件。实验测试在一系列9个标本上进行，其几何长度和装载图案不同。测试结果表明，所有标本都具有满足滞后行为，并且这种散热器的低周期疲劳性能优于传统的低碳钢制成的疲劳性能。在压缩载荷下，内棒形成螺旋变形模式，而在拉伸载荷下均匀地在纵向方向上变形，因此在试验后没有缩颈。在定量地研究包括硬化行为和压缩强度调节行为的基本机械性能。考虑到这种消散剂的考虑应力硬化性能和摩擦力的滞后模型，并获得了与实验数据的良好一致性。最后，通过数值模型详细讨论了内杆的变形图案和接触演化。

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