混凝土拱极限承载力公路桥涵规范计算方法分析.doc

基于等效梁柱法的钢筋混凝土拱承载力计算 林上顺，陈宝春 （1福建 福州 35018；2 福州大学土木工程学院） 摘要：关键词：；；承载力alculation of Load-carrying Capacity of Reinforced Concrete Arch Basing on Equivalent Beam-column Method LIN Shang-shun1 ,CHEN Bao-chun2 Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering （Fujian University of Technology), Fuzhou 350118, Fujian, China；2. School of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China) Abstract: The Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts (JTG D62-2004) in China adopt the equivalent beam-column method to predict the load-carrying capacity of the reinforced concrete arch, in this method the concrete arch is simulated to an eccentrically-loaded column with the equivalent length, then the formulas of the eccentrically-loaded column were used to the calculation of load-carrying capacity of arch. The evaluations for calculating the equivalent length (taking-value method) of arch ring in Chinese codes, the United States codes and Japanese codes are compared, and the data of 55 reinforced concrete arch bridges are collected. It is found that the equivalent length of arch ring in three codes is almost the same within the scope of the commonly used rise-span ratio. In order to verify the rationality of taking-value method of the calculation length of arch ring, the load-carrying capacities of the main arch for a reinforced concrete arch bridge are calculated by equivalent beam-column method and finite element method verified by test respectively, and the parameter analysis method is used also, it is found that the equivalent beam-column method is conservative by the comparison that the calculation results by the equivalent beam-column method are less than the results by the finite element method . Keywords: reinforced concrete arch; equivalent beam-column method; finite element method; calculation of load-carrying capacity; taking-value method of the calculation len