Corrugated plates are gaining increasing attention from researchers based on their recent extensive use in structural engineering, thanks to their potential to provide lighter and more economic structures. However, tests on the flexural behaviour of trapezoidally corrugated web girders (CWGs) are still scarce in the literature. Accordingly, the purpose of this paper is to provide the fundamental behaviour of laterally-unrestrained trapezoidally CWGs by experimental and numerical investigations. The middle parts of the specimens are loaded by pure bending moment by adopting the four-point loading process. Firstly, three CWGs are tested experimentally by changing the flange width and web height, with corrugation dimensions kept the same. The flange width varies from 80 mm to 100 mm and the web height changes from 300 mm to 400 mm. The girders are found to fail by the lateral-torsional buckling mechanism without any local flange buckling or web distortion. After that, ABAQUS software is used to increase the data required to explore the influence of different parameters on the behaviour of CWGs. The accuracy of the finite element (FE) models is verified by using the test results. This is followed by parametric studies investigating the behaviour of CWGs through the variations of the flange width, flange thickness and web height. The results indicate that increasing flange width is an effective solution for increasing the ultimate moment capacity of CWGs which is accompanied by a slight increase in the lateral displacement of the girder. Furthermore, girders with large flange widths have high load carrying capacities compared with the material used. Additionally, the results show that increasing the web height has a positive effect on the moment capacities of CWGs.

由于波纹板具有提供更轻，更经济的结构的潜力，基于其最近在结构工程中的广泛使用，越来越受到研究人员的关注。但是，对梯形波纹腹板梁（CWG）的弯曲行为的测试在文献中仍然很少。因此，本文的目的是通过实验和数值研究来提供横向不受限制的梯形CWG的基本特性。采用四点加载法，通过​​纯弯矩加载试件的中部。首先，通过更改法兰宽度和腹板高度，对三个CWG进行实验测试，而波纹尺寸保持不变。法兰宽度从80毫米到100毫米不等，腹板高度从300毫米到400毫米不等。发现梁通过横向扭转屈曲机构失效，而没有任何局部凸缘屈曲或腹板变形。之后，使用ABAQUS软件来增加探索不同参数对CWG行为的影响所需的数据。使用测试结果验证了有限元（FE）模型的准确性。随后进行参数研究，通过法兰宽度，法兰厚度和腹板高度的变化研究CWG的行为。结果表明，增加翼缘宽度是增加CWG极限弯矩承载力的有效解决方案，同时还增加了梁的横向位移。此外，与所用材料相比，具有大凸缘宽度的大梁具有较高的承载能力。此外，