【作者】 李明；

【导师】 姜忻良；

【作者基本信息】 天津大学 ， 结构工程， 2006， 硕士

【摘要】 混凝土灌芯石膏板结构是从澳大利亚引进的一种新型建筑体系。它用纤维增强石膏板作为墙体模板,石膏板在工厂预制完成运到现场,现场进行装配(孔垂直)后浇筑混凝土形成承重的墙板。在实际工程中,为了预留门窗洞口,需将相应位置的墙板锯掉,并在洞口上部剩余的墙板中配置钢筋,浇筑混凝土,来充当门窗洞口部位的过梁或构成连梁。本文对门窗洞口部位的混凝土灌芯石膏板板梁进行了试验研究。本文设计了九根混凝土灌芯石膏板板梁,进行了均布荷载作用下的静力试验,试验构件最后均发生了剪切破坏。在试验的基础上,本文分别用协调桁架模型和桁架—拱模型分析了混凝土灌芯石膏板板梁的受剪机理和破坏特点。在协调桁架模型的基础上,将石膏板面积进行等效换算,引入了截面换算系数ξ,对石膏板、混凝土共同承担荷载作用的工作机理进行了分析。进而又用桁架—拱模型对试验进行了分析。最后,将两种模型的分析结果与试验进行了对比。文章结尾总结了课题的研究成果,并对其进一步的研究做出了展望。更多还原

【Abstract】 Concrete-filled plasterboard structure is a kind of new-type building system introduced from Australia in which used fiber-reinforced plasterboard as the wall template. The plasterboard was prefabricated in the plant, and assembled together (the hole is vertical) in the building site. It was used as bearing wall after placed the concrete into it. In the actual project, it needs to cut off the corresponding position’s plasterboard in order to achieve the hole of the doors and windows, then, the reinforced concrete were placed into the residual plasterboard and used it as a lintel or a connecting beam above the hole. In the text, some experiments were accomplished to study the concrete-filled plasterboard beam above the hole.Through the experiments with nine blocks of full size concrete-filled plasterboard beams, which were under static loading, and happened shearing failures, this paper analyzed the mechanism of the beams to stand against shearing force and the characters of destruction with the modified truss model and the truss-arc model. Base on the modified truss model, a section conversion coefficientξwas introduced considering the influence of the plasterboard to shearing capacity, and analyzed the mechanism that concrete works together with plasterboard. And more, the article also analyzed the experiments with the truss-arc model. Finally, the article comparing the analysis results of two models with the experiments results.In the end of the text, some conclusions were drew on the experiments and theory analysis in this paper. At last the author gave some expectation for future researching.更多还原