地震研究

对一种典型IDC机柜进行了往复拟静力加载试验,以研究其损伤特征,获得力学性能参数。试验中对两个相同的机柜分别进行了沿短边和沿长边方向的往复加载,逐渐增大机柜顶部位移幅值,直至机柜严重破坏,观察其损伤发展过程、特征损伤现象,记录其承载力-位移滞回曲线。试验结果表明:对于此类通信机柜,门板和侧板丧失支撑作用,随后立柱-横梁节点焊缝持续开裂是关键的损伤机制,在建立有限元分析模型时应重点考虑。

Internet data center(IDC)is the core node of telecommunication networks,and IDC cabinet is one of the most important devices in internet data centers.In this study,quasi-static loading tests of a kind of typical IDC cabinets,whose results can help to understand the damage characteristics of this kind of IDC cabinets and to obtain the key parameters describing their mechanical performance,were carried out.In the tests,the same two cabinets were loaded along the short-side direction and the long-side direction respectively.The displacement on the top of the cabinets is increased gradually until the cabinets were seriously damaged.During the tests,the damage characteristics and the failure process of the cabinets were observed.The bearing capacity-displacement curves of the cabinets were obtained.The test results indicated that,for this kind of cabinets,the failure of the door and side plates,along with the cracking of the column-beam weld were two key damage characteristics,which should be considered when establishing the finite element models for this kind of IDC cabinets.

引言
1 IDC机柜概况
2 机柜所用钢材的拉伸试验和力学性能参数
3 IDC机柜拟静力试验
4 IDC机柜拟静力试验结果
5 结论

图1 IDC机柜承力框架示意图<br/>Fig.1 The load-bearing frames in IDC cabinet

图1 IDC机柜承力框架示意图
Fig.1 The load-bearing frames in IDC cabinet

图2 试验机柜、配重及传感器布置<br/>Fig.2 The test cabinet,counterweight and sensor arrangement

图2 试验机柜、配重及传感器布置
Fig.2 The test cabinet,counterweight and sensor arrangement

图3 标准钢材拉伸性能试验试件<br/>Fig.3 The specimens for standard steel tensile test

图3 标准钢材拉伸性能试验试件
Fig.3 The specimens for standard steel tensile test

图4 试验后试件的破坏照片及加载装置<br/>Fig.4 The destroyed specimens and the test apparatus

图4 试验后试件的破坏照片及加载装置
Fig.4 The destroyed specimens and the test apparatus

图5 两组试件的拉伸应力-应变曲线<br/>Fig.5 Stress-strain curves of the two groups of specimens

图5 两组试件的拉伸应力-应变曲线
Fig.5 Stress-strain curves of the two groups of specimens

表1 机柜使用钢材主要物理和力学指标<br/>Tab.1 Physical and mechanical parameters of the steel used for cabinets

表1 机柜使用钢材主要物理和力学指标
Tab.1 Physical and mechanical parameters of the steel used for cabinets

图6 传感器布置图
Fig.6 Sensor layout

图7 加载位移历程<br/>Fig.7 The displacement-loading history

图7 加载位移历程
Fig.7 The displacement-loading history

表2 加载工况幅值<br/>Tab.2 Amplitudes of loading conditions

表2 加载工况幅值
Tab.2 Amplitudes of loading conditions

表3 第一台机柜沿X方向加载时机柜的损伤发展过程<br/>Tab.3 Damage process of the first cabinet when being loaded along X-direction

表3 第一台机柜沿X方向加载时机柜的损伤发展过程
Tab.3 Damage process of the first cabinet when being loaded along X-direction

表4 第二台机柜沿Y方向加载时机柜的损伤发展过程<br/>Tab.4 Damage process of the second cabinet when being loaded along Y-direction

表4 第二台机柜沿Y方向加载时机柜的损伤发展过程
Tab.4 Damage process of the second cabinet when being loaded along Y-direction

图8 机柜1和机柜2分别沿X、Y方向力-位移滞回曲线<br/>Fig.8 The force-displacement curves of the cabinet 1 along X(a)and cabinet 2 along Y(b)direction

图8 机柜1和机柜2分别沿X、Y方向力-位移滞回曲线
Fig.8 The force-displacement curves of the cabinet 1 along X(a)and cabinet 2 along Y(b)direction

图9 IDC机柜在X、Y方向力-位移滞回性能的比较<br/>Fig.9 Comparison of the force-displacement behavior of the IDC cabinet along X(solid line) and Y(dotted line)direction

图9 IDC机柜在X、Y方向力-位移滞回性能的比较
Fig.9 Comparison of the force-displacement behavior of the IDC cabinet along X(solid line) and Y(dotted line)direction

图10 两机柜试验前后频率<br/>Fig.10 Frequency of the two cabinets before(black line)and after(red line)the experiment

图10 两机柜试验前后频率
Fig.10 Frequency of the two cabinets before(black line)and after(red line)the experiment

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备注

引言

1 IDC机柜概况

2 机柜所用钢材的拉伸试验和力学性能参数

3 IDC机柜拟静力试验

4 IDC机柜拟静力试验结果

5 结论

期刊信息