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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Systematic development of a new hysteretic damper based on torsional yielding: part IIexperimental phase
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Systematic development of a new hysteretic damper based on torsional yielding: part IIexperimental phase

机译：基于扭转屈服的新型磁滞阻尼器的系统开发：第二部分实验阶段

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This paper reports on experimental studies carried out on a 200kN, 120mm-capacity prototype of the newly developed multidirectional torsional hysteretic damper for seismic protection of structures. The main goal of the experiments is to test the validity of the theory developed in a companion paper and to evaluate the low-cycle fatigue performance of the energy dissipaters of the damper. Because the design and configuration of the damper allow easy replacement of the energy dissipaters, four sets of energy dissipaters were produced out of S355J2+N, C45 (two sets), and 42CrMo4+QT steel grades. Force-displacement response of the multidirectional torsional hysteretic damper is studied through fully reversed cyclic quasi-static displacement-controlled tests that were carried out in compliance with EN 15129. Following the verification tests, with the aim of studying fatigue and fracture behavior of the cylindrical energy dissipaters of the device, certain numbers of them were subjected to further cyclic tests up to failure, and observations on their fatigue/fracture behavior are reported. The experimental verification test results proved the validity of the developed theory and component design assumptions presented in a companion paper. Furthermore, the energy dissipaters exhibited excellent torsional low-cycle fatigue performance with number of cycles to failure reaching 118 at a maximum shear strain of 8% for S355J2+N steel grade. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：本文报道了在新开发的用于结构抗震保护的多向扭力滞回阻尼器的200kN，120mm容量原型上进行的实验研究。实验的主要目的是检验伴随论文中开发的理论的有效性，并评估减震器消能器的低周疲劳性能。由于减震器的设计和配置可轻松更换耗能器，因此从S355J2 + N，C45（两套）和42CrMo4 + QT钢牌号中生产了四套耗能器。通过根据EN 15129进行的完全反向循环准静态位移控制测试，研究了多向扭力滞回阻尼器的力-位移响应。经过验证测试，目的是研究圆柱体的疲劳和断裂行为装置的能量耗散器，其中的一些受到进一步的循环测试直至失效，并报告了其疲劳/断裂行为的观察结果。实验验证测试结果证明了随附论文中提出的理论和组件设计假设的有效性。此外，对于S355J2 + N钢，消能器表现出出色的扭转低循环疲劳性能，在最大剪切应变为8％的情况下，失效循环数达到118。版权所有（c）2015 John Wiley＆Sons，Ltd.

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