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首页> 外文期刊>International journal of steel structures >Cyclic Behavior of Steel Frame Joints in the Offshore Atmospheric Environment
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Cyclic Behavior of Steel Frame Joints in the Offshore Atmospheric Environment

机译：近海大气环境中钢框架关节的循环行为

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摘要

The natural deterioration of mild steel elements exposed to offshore atmospheric environments compromises the long-term safety of existing steel buildings. An experimental study was conducted to investigate the effect of the offshore atmospheric environment on the seismic performance of steel frame joints. An indoor accelerated corrosion test was conducted to simulate the degradation of the mechanical properties of the materials and steel frame joints in the offshore atmospheric environment. After determining the corrosion rate by weighing after rust removal, the yield strength, ultimate strength, modulus of elasticity, and elongation of three test specimen with different thicknesses were obtained by regression of the tensile failure test, which demonstrated a linear decay relationship with the corrosion rate. Under four different corrosion degrees and three different low-cycle reciprocating loads, the failure modes of 12 steel frame joints were all plate-tearing at welded through holes. However, the difference is that the joints had ductile failure under equal-amplitude 90 mm loading and brittle failure under variable-amplitude loading. The effects of corrosion on the hysteresis behavior, deformation degradation, strength degradation, and energy dissipation capacity of steel frame joints were analyzed. The test results indicate that corrosion has significant effects on the seismic performance of steel frame joints. With the increase in corrosion degree, the energy dissipation capacity of steel frame joints declines more significantly than other performance indicators, and the yield platform of the steel frame joints is not evident.
机译：暴露于海上大气环境的温和钢元件的自然劣化会损害现有钢制建筑的长期安全性。进行了实验研究，以研究海上大气环境对钢框架接头抗震性能的影响。进行室内加速腐蚀试验以模拟近海大气环境中材料和钢框架接头的机械性能的降解。通过在去除后测量腐蚀速率后，通过回归拉伸衰竭试验，获得屈服强度，极限强度，弹性模量，具有不同厚度的三种试样的伸长率，这表明了与腐蚀的线性衰减关系速度。在四种不同的腐蚀度和三种不同的低循环往复载荷下，12个钢框架接头的故障模式都是焊接通孔的撕开。然而，差异是，接头在可变幅度载荷下在等幅度90mm负载和脆性失败下具有延性衰竭。分析了腐蚀对钢框架关节滞后行为，变形降解，强度降解和能量耗散能力的影响。测试结果表明，腐蚀对钢框架接头的地震性能具有显着影响。随着腐蚀程度的增加，钢框架关节的能量耗散能力比其他性能指标更显下降，钢框架关节的产量平台并不明显。

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  • 来源
    《International journal of steel structures》 |2020年第3期|870-884|共15页
  • 作者

    Qiang Xu; Xiaoyu Shang; Shansuo Zheng;

  • 作者单位

    Geological Engineering and Surveying Engineering College Chang'an University Xi'an 710054 People's Republic of China School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 People's Republic of China;

    School of Civil Engineering and Architecture Northeast Electric Power University Jilin 132012 People's Republic of China;

    School of Civil Engineering Xi'an University of Architecture and Technology Xi'an 710055 People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Offshore atmospheric environment; Steel frame joints; Cyclic behavior; Corrosion;

    机译：海上大气环境;钢框架;循环行为;腐蚀;

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