高强混凝土梁受弯承载力安全储备及经济性分析

Economic Analysis of the Safety Degree of Reinforced Concrete Beams

高强材料的应用可以使得结构的安全储备能力得到很大提高。综合不同结构受力性能的特点,从承载力储备和变形能力储备两方面建议了统一安全储备指标,并以钢筋混凝土梁的受弯承载力为对象,对采用不同钢筋品种情况的受弯承载力安全储备及其经济性进行了分析研究,结果表明高强钢筋的应用在安全储备方面可以获得更为经济合理的设计结果。

As the development of material technology,more and more high-strength materials are applied into the engineering structure.However,the high price of high-strength materials is the main factor that counteract its application.But from the view of safety,the application of high-strength materials can great increase safety margin of a structure.A uniform safety degree index which includes the strength margin and deformation margin is suggested.Then the proposed uniform safety degree index is used to obtain the efficiency analysis of reinforcement-concrete beams with different strength grades of steel bars.It shows that the application of the high-strength steel reinforcement is more economical than ordinary reinforcement in the view of safety margin for the structure.The results will help engineers to understand benefits in the promotion of high-strength steel.