材料科学
改装
梁(结构)
结构工程
复合材料
T形梁
大梁
水泥
钢筋混凝土
桥(图论)
工程类
医学
内科学
作者
Haleem K. Hussain,Lian Zhen Zhang,Gui Wei Liu
标识
DOI:10.1016/j.conbuildmat.2012.09.088
摘要
This paper presents a new type of material that can be used in many construction fields, especially for strengthening beams or bridge girders and retrofitting structural concrete elements. This material is called polyurethane-cement (PUC). The main purpose of using this new material is that it increases the capacity of beams and reduces crack propagation through the concrete. The first case involves a normal reinforced T-beam. The second case involves a control T-beam strengthened with PUC. The third case involves preloading a control T-beam (up to 50 kN), noting the occurrence of cracks (widths not exceeding 0.2 mm), releasing the load, and then strengthening the beam using PUC. The experiments show significant results: an excellent improvement in the loading capacity of around 170% and a crack width reduction of around 58%. FEM analysis results using ABAQUS software showed excellent agreement with experimental results.
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