余志武, 周凌宇, 蒋丽忠. 钢-混凝土连续组合梁滑移与挠度耦合分析[J]. 工程力学, 2004, 21(2): 76-83.
引用本文: 余志武, 周凌宇, 蒋丽忠. 钢-混凝土连续组合梁滑移与挠度耦合分析[J]. 工程力学, 2004, 21(2): 76-83.
YU Zhi-wu, ZHOU Ling-yu, JIANG Li-zhong. COUPLING ANALYSIS OF SLIP AND DEFLECTION OF CONTINUOUS COMPOSITE BEAMS OF STEEL AND CONCRETE[J]. Engineering Mechanics, 2004, 21(2): 76-83.
Citation: YU Zhi-wu, ZHOU Ling-yu, JIANG Li-zhong. COUPLING ANALYSIS OF SLIP AND DEFLECTION OF CONTINUOUS COMPOSITE BEAMS OF STEEL AND CONCRETE[J]. Engineering Mechanics, 2004, 21(2): 76-83.

钢-混凝土连续组合梁滑移与挠度耦合分析

COUPLING ANALYSIS OF SLIP AND DEFLECTION OF CONTINUOUS COMPOSITE BEAMS OF STEEL AND CONCRETE

  • 摘要: 钢-混凝土连续组合梁界面滑移在一定程度上减小组合梁刚度,增大变形,影响构件性能.为定量研究组合梁界面滑移对构件性能的影响,对11根钢-混凝土连续组合梁进行了静力试验,描述了连续组合梁的滑移和挠度分布规律,建立了不同边界条件和不同荷载作用下的简支组合梁滑移挠度联合微分方程组,利用叠加法建立了钢-混凝土连续组合梁滑移和挠度的解析解计算公式.利用解析公式对17根连续组合梁试件进行了计算,计算结果与实测值吻合较好.计算结果表明,剪力连接程度对挠度有一定影响,当剪力连接度达到完全连接后,增大剪力连接度对挠度影响很小;当剪力连接度在0.6~1.0范围内时,界面滑移引起的挠度增量小于5%;同时,随连续组合梁剪力连接度的降低,连续组合梁界面滑移逐渐趋近于无剪力连接的叠合板滑移值.

     

    Abstract: The interfacial slip of composite beams of steel and concrete can reduce the stiffness, increase deformation and influence performance. Experimental results of 11 samples of continuous composite beams of steel and concrete are presented in the paper, which include the law of slip and deflection of continuous composite beams. A set of analytical expressions for slip and deflection of continuous composite beam are presented by superposition method. 17 continuous composite beams are studied with the analytical expressions, and the results agree with the experimental data. It is shown that the degree of shear connection influences the deflection to a certain degree. The degree of shear connection has little influence on the deflection when full connection is reached. The increment of deflection by interfacial slip is less than 5% when the degree of connection is 0.6~1.0. Furthermore, the interfacial slip goes near to that of sandwich beam with the decrease of the degree of connection.

     

/

返回文章
返回