华南理工大学学报（自然科学版）2026，Vol.54Issue(2)：112-122,11.DOI:10.12141/j.issn.1000-565X.250163
UHPC梁式构件抗弯性价比评价体系研究及应用
Research and Application of an Evaluation System for the Flexural Cost Performance Ratio of UHPC Beam Components
摘要
Abstract
Ultra-high performance concrete(UHPC)has demonstrated significant application potential in beam components due to its excellent mechanical properties,durability,and environmental friendliness.However,the high material cost often leads to the misconception that UHPC structures offer low cost-effectiveness,which hinders their widespread engineering adoption.Existing studies mostly focus on optimizing the mechanical properties of UHPC components,but there is a notable lack of systematic evaluation regarding their flexural cost performance ratio.To address this gap,this paper established a comprehensive evaluation system for the flexural cost perfor-mance ratio of beam components,aiming to provide theoretical support for the rational design and engineering appli-cation of UHPC structures.Firstly,with"performance"and"cost"as the core considerations,an evaluation indica-tor for flexural cost performance ratio was constructed.Subsequently,the ultimate bending moment was selected to characterize the flexural performance of components,while the material cost per unit length of the pure bending segment was used to represent economic cost.Based on these,a quantifiable cost performance ratio indicator was established.Subsequently,the classic reference method was employed,taking conventional single-reinforcement rectangular beams with appropriate reinforcement as the reference benchmark.The cost performance ratio indicator was then rendered dimensionless throgh the range standardization method.On this basis,integreating probability theory and the K-means clustering algorithm,a grading system for flexural cost performance ratio was established,ensuring both scientific rigor and objectivity.Finally,the evaluation system was applied to comparatively analyze the differences in flexural cost performance ratio between conventional beam members and UHPC beam members.The research results show that the flexural cost performance ratio of reinforced concrete beams is independent of beam width but exhibits a positive correlation with both beam depth and material strength grade.In component design,priority should be given to combinations of higher-strength concrete and highe-strength steel reinforcement,and the substitution of tensile reinforcement with prestressed steel strands can also be considered.Furthermore,if UHPC is simplely used as a direct replacement for ordinary concrete in developing new components,it does not demonstrate an advantage in flexural cost performance ratio.Only through tailored designs that leverage the mechanical characteristics of UHPC and other construction materials can component forms with a high flexural cost performance ratio be achieved.关键词
超高性能混凝土/梁式构件/性价比评价体系/抗弯性能/等级划分Key words
UHPC/beam component/evaluation system for cost performance ratio/flexural performance/grading分类
建筑与水利引用本文复制引用
范学明,叶小杭,周晓鹏,印世麟..UHPC梁式构件抗弯性价比评价体系研究及应用[J].华南理工大学学报（自然科学版）,2026,54(2):112-122,11.基金项目
国家自然科学基金项目(52278501,52278181) （52278501,52278181）
广东省地震工程与应用技术重点实验室开放基金项目(2017B030314068)Supported by the National Natural Science Foundation of China(52278501,52278181)and the Open Fund Project of Guangdong Key Laboratory of Earthquake Engineering and Applied Technology(2017B030314068) （2017B030314068）
