4.5 Article

A new type of steel-concrete composite channel girder and its preliminary experimental study

期刊

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
卷 85, 期 -, 页码 163-177

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.jcsr.2013.03.005

关键词

Channel; Steel-concrete composite beam; Experiment; Flexural load carrying capacity; Section analysis method

资金

  1. Natural Science Foundation of China [50778103, 50828803, 50808110, 51278488]
  2. Beijing Natural Science Foundation [8071003]
  3. PCSIRT [IRT00736]

向作者/读者索取更多资源

A new type of steel-concrete composite beam that is specifically applicable to railway bridges is presented. The beam is featured with a channel shaped section. For such a section, the U-section steel beam is prefabricated with steel plates and the interior side of the channel is cast with concrete. The steel plates and concrete are integrated through shear stud connectors and work together to distribute loads. This type of structure not only inherits the characteristics of traditional concrete channel beams but also possesses its own unique attributes, such as advantageous mechanical performances, facilitating construction process, and low maintenance cost etc. To develop a design method for this new type of structures, and based on some FEM analysis, a static test of four-point symmetric bending was designed on a simply supported steel-concrete composite channel beam model with 1/3 sectional scale and 1/4 length scale. Preliminary research was conducted on its bending capacity, stiffness, stress distribution, crack diagram etc. Experimental results revealed that the steel plates and the concrete slab integrated through shear stud connectors can work well together and the channel beam model presented a bending failure mode. The flexural load carrying capacities and deformations of the composite channel beam were also analyzed by the Section analysis method, and the results agreed well with those from the test. (C) 2013 Elsevier Ltd. All rights reserved.

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