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• 지관 압축을 받는 고강도강 X형 각형강관접합부의 구조적 성능에 대한 실험적 연구(Experimental Study of High-strength Steel RHS X-joints under Axial Compression)

• 저자: 김정현, 이철호, 한규홍, 김선후

• Abstract: The application of high-strength steel to RHS joints can bring many benefits for structures, but it is forbidden or permitted with high-strength penalty in KBC 2016 and most representative international standards. To examine the appropriateness of these limitations, especially the strength reduction penalty imposed on high-strength steels, six RHS X-joint specimens were tested under axial compression. The key parameters of the test are brace to chord width ratios and grades of steels. All high-strength steel specimens exhibited sufficient strength compared to the EC3 strength criteria; their strengths were even higher than the EC3 unreduced nominal strength. It was also found that the formulation of sidewall buckling strength in current EC3 is inaccurate (too conservative) and needs to be improved.