摘要
钢板-砖砌体组合结构非常适合于砖混结构承重墙抽除的大空间改造,但对其受力性能的研究很少。通过4根钢板-砖砌体组合梁和4根组合柱的静载试验,研究组合构件的破坏过程与形态、承载力、控制截面的应变分布以及变形等。结果表明组合构件的破坏始于钢板的局部压曲失稳;承载力的主要影响因素有钢板组合形式、灌注材料、钢板厚度;组合梁中有底板的工作性能好于没有底板的;随着灌注材料的黏结性能增强、钢板厚度增大,构件的承载力得到提高;组合梁的抗弯刚度较大,能够满足正常使用;梁、柱中部截面上钢板的应变分布基本符合平截面假定;组合柱的钢板存在压应力重分布等。通过比较分析,依据本文的螺栓间距,基于钢板达到屈服强度的简化计算方法仅适用于无底板且无灌注材料或灌注水泥浆的组合梁,以及灌注结构胶的组合柱。
Steel plate-masonry composite structures are popular when load bearing walls are removed for a large space, but studies on its behavior are rare. Four steel plate-masonry composite beams and four steel-masonry composite columns under static loads were tested to study the failure process and mode, ultimate capacity, and strain distribution in critical cross-sections, and the deflection of composite specimens, etc. The results showed that the composite elements began to fail in the destruction of the compressive steel plate owing to local buckling; the main influence factors of bearing capacity included combination form, injection material, and thickness of steel plate ; the behavior of composite beam with bottom steel plate was better than that with no plate at the bottom ; the better the behavior of bonding material and the greater the thickness of the plate, the higher load-carring capacity the beam could bear; the bending rigidity of the composite beam was larger and could satisfy the requirements of normal service; the strain distribution of the steel plate in mid-span cross-section of the beams or columns was consistent with the plain strain condition; and the steel plate of columns experienced re-distribution of compressive stress. Through comparative analysis, the simplified method, based on the yield strength of steel plate and the proposed bolt distance, can be applicable to the composite beams without bottom steel plate and injecting material or with injecting cement, and applicable to the composite columns with injecting structural adhesive.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第6期48-56,共9页
China Civil Engineering Journal
基金
住房和城乡建设部研究开发项目(2008-R2-20)
关键词
钢板
砖砌体
组合梁
组合柱
受力性能
steel plate
masonry
composite beam
composite column
behavior
