中欧规范钢-混组合梁抗弯承载力计算方法对比  

Comparison of calculation methods for flexural load capacity of steel-composite beams based on Chinese and European codes

作　　者：暨邦冲 JI Bangchong(School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China)

机构地区：[1]福建工程学院土木工程学院,福建福州350118

出　　处：《福建工程学院学报》2022年第1期53-60,共8页Journal of Fujian University of Technology

摘　　要：在收集钢-混凝土组合梁试验研究资料的基础上,分别采用中国规范GB 50917-2013、JGJ138-2016、欧洲规范Eurocode 4(简称EC4)及线弹性法,计算所收集试件的抗弯承载力,并与试验结果进行比较。结果表明:GB 50917-2013、JGJ 138-2016与EC4中抗弯承载力的计算方法,主要的不同在于有效宽度的取值、是否考虑滑移效应的影响以及是否计入纵向钢筋对抗弯承载力的贡献;GB 50017-2017与JGJ138-2016的计算方法得到的抗弯承载力的计算理论值与试验实测值更加接近,且数据更为稳定;GB 50917-2013不仅考虑了整体栓钉布置导致的滑移效应,还考虑了纵向钢筋对承载力的贡献,所计算出的结果偏于保守;线弹性法比塑性理论更为保守。由于目前的计算方法与实际情况仍有一定误差,下一步建议从有效宽度、纵向钢筋对抗弯承载力的贡献与滑移效应的角度出发,提出更适用于计算钢-混凝土组合梁抗弯承载力的方法。On the basis of the collected information from the experimental study of steel-concrete composite beams,the flexural load capacity of the collected specimens was calculated using the Chinese code GB 50917-2013,JGJ 138-2016 and the European code Eurocode 4(EC4 for short)and the linear elastic method respectively,and then the results were compared with the experimental results.Results show that:the main differences between the calculation methods of flexural bearing capacity in GB 50917-2013,JGJ 138-2016 and EC4 are the value of effective width,whether to consider the slip effect and contribution of longitudinal reinforcement to flexural bearing capacity;the calculated theoretical value of the flexural bearing capacity obtained by the calculation method of GB 50017-2017 and JGJ 138-2016 is closer to the actual measured value of the test,and the data is more stable;GB 50917-2013 not only considers the slip effect caused by the overall peg arrangement,but also considers the contribution of the longitudinal reinforcement to the bearing capacity,and the calculated results are more conservative;linear elasticity method is more conservative than plastic theory.Since there are still errors between the current calculation method and the actual situation,the next step is to mainly consider the effective width,the contribution of longitudinal reinforcement to the flexural load bearing capacity with consideration of the slip effect,etc.,and propose a calculation method more suitable for calculating the flexural load bearing capacity of steel-concrete combination beams.

关 键 词：桥梁工程 组合结构 钢-混凝土组合梁 规范比较 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]