CAJ | 학술논문

综述了国内外有关CFRP加固钢管混凝土结构的技术与应用的最新进展,对CFRP钢管混凝土的结构组成、受力机理进行了理论分析.利用CFRP抗拉强度高和便于施工操作等优点在既有钢筋、钢管混凝土、钢结构的维修加固方面的广阔应用前景,采用双剪统一强度理论,考虑中间主应力以及CFRP筒对内层钢管混凝土的环向紧箍作用,在厚壁圆筒的统一强度理论解基础上,推导出了CFRP加固钢管混凝土轴压短柱的极限承载力计算公式.与相关文献资料的试验结果进行了比较,吻合较好,验证了理论公式的正确性和可行性,并且该公式可以退化为圆钢管混凝土轴压短柱极限承载力的表达式,从而进一步验证了统一强度理论对CFRP加固钢管混凝土轴压短柱承载力计算的适用性.该结果为CFRP加固钢管混凝土轴压承载力分析提供了一定的理论依据,对理论研究和工程设计有一定的参考价值.
종술료국내외유관CFRP가고강관혼응토결구적기술여응용적최신진전,대CFRP강관혼응토적결구조성、수력궤리진행료이론분석.이용CFRP항랍강도고화편우시공조작등우점재기유강근、강관혼응토、강결구적유수가고방면적엄활응용전경,채용쌍전통일강도이론,고필중간주응력이급CFRP통대내층강관혼응토적배향긴고작용,재후벽원통적통일강도이론해기출상,추도출료CFRP가고강관혼응토축압단주적겁한승재력계산공식.여상관문헌자료적시험결과진행료비교,문합교호,험증료이론공식적정학성화가행성,병차해공식가이퇴화위원강관혼응토축압단주겁한승재력적표체식,종이진일보험증료통일강도이론대CFRP가고강관혼응토축압단주승재력계산적괄용성.해결과위CFRP가고강관혼응토축압승재력분석제공료일정적이론의거,대이론연구화공정설계유일정적삼고개치.
New progress, of research and applications of CFRP at home and abroad are introdnced in this paper. The circular eonerete-filled tubular CFRP-steel stub column under axial loads is studied based on the unified strength theory in the paper. The effect of intermediate principal stress on the ultimate strength for the concrete-filled tubular CFRP-steel stub column are investigated. The ultimate load calculation formula for the concrete-filled tubular CFRP-steel stub column is derived, and can be simplified for cases without CFRP. Compared with the solution obtained in this paper and the experimental results, the good agreement can be found. The effects of the intermediate shear stress, the cress-section deformation ratio and also the inner friction angle of the concrete are all considered in the theory analysis. The applicability of the unified strength theory in the field of concrete-filled CFRP-steel tube are further tested by the analysis results. It has an important theory value for engineering application.