HRB500级钢筋混凝土偏压构件受力性能的数值分析

【作者】 于红杰；

【导师】 刘立新；

【作者基本信息】 郑州大学 ， 建筑与土木工程， 2006， 硕士

【摘要】 HRB500钢筋是指强度标准值为500MPa的热轧带肋钢筋，是我国通过对钢筋成分的微合金化而开发出来的一种强度高、延性好的钢筋新品种。在国外强度为500MP的钢筋已得到广泛应用，而我国《混凝土结构设计规范》GB50010-2002中尚未列入，为尽快实现与国际接轨，在我国工程领域推广这种新型钢筋，需对HRB500级钢筋混凝土构件主要受力性能进行试验研究。 本文利用全过程数值分析的方法，变换混凝土强度、长细比、偏心比、配筋率等参数，对81个HRB500级钢筋混凝土偏压构件的进行了模拟试验，利用计算结果对HRB500钢筋混凝土偏压构件受力性能进行分析，并将数值分析结果与按现行规范计算的结果进行对比，表明了本文所建议结果的可靠性和可行性。 HRB500级钢筋混凝土构件的偏压性能试验研究表明，HRB500级钢筋混凝土构件偏压性能与普通钢筋混凝土构件相同。可按现行《混凝土结构设计规范》GB50010-2002规定计算偏压构件的正截面的承载力。在采HRB500级钢筋作为主筋的受压构件，钢筋强度设计值可取f_y=f_yk／γ_f=500／1.1≌450MPa，具有足够的安全储备。 本课题为国家自然科学基金（50578148）资助课题更多还原

【Abstract】 The standard value of HRB500 steel bar’s tensile strength is 500MPa. It is a new type steel bar which has many merits, such as hi-strength and strong ductility. This kind of steel bar has been used prevalently in foreign countries. But it hasn’t been taken in by new Code for design of concrete structures （GB50010-2002）.In order to take the internationalization into reality as soon as possible and popularize this new kind of steel bar in engineering area of our country, the experiment researches should be done on the main characteristic of HRB500 reinforced flexural members.In this paper, numerical analysis of the whole process is used. The simulation experiment is carried out to 81 HRB500 reinforced eccentric loading columns by changing the parameters, such as concrete strength, slenderness ratio, eccentricity ratio, reinforcement ratio. The analysis is done on the main characteristic of HRB500 reinforced eccentric loading members by using the calculation results. Then the results of the numerical analysis are compared with the calculation results according to the present code, which indicates that the suggestion results of this article are reliable and feasible.The experiment research shows that the performance of HRB500 reinforced eccentric loading members is the same as that of the common reinforced concrete members. It’s bearing capacity of eccentric loading members can be calculated by the formula of cross-section in the Code for design of concrete structure （GB50010-2002）. The result shows that the HRB500 reinforced concrete member is safe enough. And I propose f_y = f_yk/γ_f =500/1.1≌450Mpa.This subject is the program of National natural science fund （50578148）.更多还原