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Application of Various NDT Methods for the Evaluation of Building Steel Structures for Reuse

机译：多种NDT方法在建筑钢结构再利用评价中的应用

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摘要

The reuse system proposed by the authors is an overall business system for realizing a cyclic reuse flow through the processes of design, fabrication, construction, maintenance, demolition and storage. The reuse system is one of the methods to reduce the environmental burden in the field of building steel structures. These buildings are assumed to be demolished within approximately 30 years or more for physical, architectural, economic and social reasons in Japan. In this paper, focusing on building steel structures used for plants, warehouses and offices without fire protection, the performance of steel structural members for reuse is evaluated by a non-destructive test. First, performance evaluation procedures for a non-destructive test, such as mechanical properties, chemical compositions, dimension and degradation, are shown. Tensile strengths are estimated using Vickers hardness measured by a portable ultrasonic hardness tester, and chemical compositions are measured by a portable optical emission spectrometer. The weldability of steel structural members is estimated by carbon equivalent and weld crack sensitivity composition using chemical compositions. Finally, the material grade of structural members of the building steel structure for reuse is estimated based on the proposed procedures.
机译：作者提出的重用系统是一个整体业务系统，用于通过设计，制造，构造，维护，拆卸和存储过程实现循环重用流程。再利用系统是减轻建筑钢结构领域的环境负担的方法之一。在日本，由于物理，建筑，经济和社会原因，这些建筑物被假定在大约30年或更长时间内被拆除。在本文中，针对无火灾保护的工厂，仓库和办公室使用的建筑钢结构，通过无损测试评估了钢结构构件的可重复使用性能。首先，显示了非破坏性测试的性能评估程序，例如机械性能，化学成分，尺寸和降解。使用通过便携式超声波硬度测试仪测量的维氏硬度来估计拉伸强度，并且通过便携式光发射光谱仪来测量化学成分。钢结构构件的可焊接性通过碳当量和使用化学成分的焊接裂纹敏感性成分来估算。最后，根据拟议的程序估算可重复使用的建筑钢结构结构构件的材料等级。

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