| Experimental Research on Shear Behavior of Reinforced Concrete Composite Beams Under Uniformly Distributed Load |
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| 作者单位： | ZHAO Shunbo Ass. Prof.，North China Institute of Water Conservancy and Hydroelectric Power，Zhengzhou 450045，P. R. China. |
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| 摘 要： | An experimental program was carried out to study the shear behavior of the reinforced con-crete composite beam(RCCB)subjected to two-phase uniformly distributed load.A total of 12 reinforcedconcrete composite beams were tested:10 of them were the RCCB subjected to two-phase uniformly dis-tributed load,the other 2 were the comparative reinforced concrete beams cast at the same time as theRCCB subjected to one-phase uniformly distributed load.The interface of precast unit and recast concretewas natural and rough.The test range of the main composite factors:the ratio of precast section depth tocomposite section depth was from 0.35 to 0.65,the ratio of first-phase load moment to precast section ulti-mate bearing moment was from 0.25 to 0.65.Based on the test results,the stresses of the longitudinal rein-forcements and stirrups,the load-bearing properties of the interface,the crack state and the failure charac-teristics of the RCCB under uniformly distributed load are discussed.The effects of the stirrups,the
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Experimental Research on Shear Behavior of Reinforced Concrete Composite Beams Under Uniformly Distributed Load |
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| Authors: | ZHAO Shunbo Ass Prof North China Institute of Water Conservancy and Hydroelectric Power Zhengzhou P R China |
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| Institution: | ZHAO Shunbo Ass. Prof.,North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou 450045,P. R. China. |
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| Abstract: | An experimental program was carried out to study the shear behavior of the reinforced concrete composite beam (RCCB) subjected to two-phase uniformly distributed load. A total of 12 reinforced concrete composite beams were tested: 10 of them were the RCCB subjected to two-phase uniformly distributed load, the other 2 were the comparative reinforced concrete beams cast at the same time as the RCCB subjected to one-phase uniformly distributed load. The interface of precast unit and recast concrete was natural and rough. The test range of the main composite factors: the ratio of precast section depth to composite section depth was from 0.35 to 0.65, the ratio of first-phase load moment to precast section ultimate bearing moment was from 0.25 to 0.65. Based on the test results, the stresses of the longitudinal reinforcements and stirrups, the load-bearing properties of the interface, the crack state and the failure characteristics of the RCCB under uniformly distributed load are discussed. The effects of the stirrups, the concrete strength and the composite factors on the shear resistance of the RCCB are analyzed, and the method for evaluating the shear resistance of the RCCB is proposed. |
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| Keywords: | reinforced concrete composite beam shear resistance composite factor mechanism of failure |
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