混凝土多孔砖墙体抗震性能试验研究

【作者】 巩耀娜；

【导师】 刘立新； 徐有邻；

【作者基本信息】 郑州大学 ， 结构工程， 2008， 硕士

【摘要】 混凝土多孔砖节约土地资源,保护环境,砌筑灵活,且与黏土多孔砖的外形尺寸相同,因此其适应我国建筑环境、建筑工艺及操作方法和习惯,易于为设计和施工等技术管理人员所接受。作为一种新型墙材,2004年7月国家发改委正式发布了建材行业新标准《混凝土多孔砖》。但是,到目前为止,关于混凝土多孔砖的文献和试验资料都比较少,相应的设计施工规程更是一片空白,使该产品的推广和应用受到了很大的限制。本文对该产品的材料力学性能和抗震性能进行了一系列的试验研究和理论分析,给出了一些结论和建议公式。通过混凝土多孔砖的抗压性能及抗冻性能试验,研究了混凝土多孔砖的抗压性能指标及抗冻性能指标,结果表明其抗压强度及强度损失率和质量损失率均符合国家相关规范的要求。通过四片带构造柱的混凝土多孔砖墙体及三片不带构造柱的混凝土多孔砖墙体在低周反复水平荷载作用下的对比试验,研究了该七片混凝土多孔砖墙体在低周反复水平荷载作用下的抗震抗剪承载力、破坏形态、滞回特性、延性系数、骨架曲线及刚度退化等性能,结果表明构造柱能够有效地提高混凝土多孔砖墙体的抗震性能。在拟静力试验的基础上,本文详细地分析了影响墙体抗震性能的因素,提出了混凝土多孔砖墙体抗震抗剪承载力的建议计算公式,该公式的计算结果与本文的试验结果吻合较好。更多还原

【Abstract】 The application of concrete perforated brick saves land resource, protects the environment, and enables flexible laying. In addition, concrete perforated brick has the same dimension with clay perforated brick, so it suits the construction situation, construction technology, working method and habit of our country, and can be easily accepted by the design, construction and technical management personnel. As one kind of new wall materials, in July 2004, the Committee of Development and Reform formally issued Concrete Perforated Brick, a new standard of construction material industry. However, owing to one kind of new materials, there is only a little documentation and test information on the application of it. Its design and construction specification of the state, of the industry or of the local area have not been established yet. Therefore, the introduction and application of this product is limited. For both of these reasons, this article provides a series of tests and theoretical research on the material properties and the seismic performance of this product, makes analysis and summary, and provides some conclusions and suggestions formulas.The experimental study for the compressive performance and the anti-frozen performance of concrete perforated brick is carried out, and the indexes about these aspects are worked out. The results show that the compressive strength, the strength loss and the quality loss accorded with the Code requirements.In addition, experiments are carried out to study on the seismic behavior including 4 walls with concrete perforated bricks and restricting constructional columns and 3 walls only with concrete perforated bricks under the low cyclic loadings. And the bearing capacity, failure feature, hysteretic property, skeleton curve, ductility coefficient, stiffness and its attenuation of these walls have been discussed. The experimental results show that the seismic behavior of the walls with restricting constructional columns is obviously improved compared with the usual ones. That is to say, the specimens with restricting constructional columns at the boundary have good seismic behaviors. Also, the factors influencing the seismic performance are deeply analyzed, and a formula for calculation the shear loading-bearing capacity of the walls with restricting constructional column is suggested. At the same time, the formula is in comparison with other formulas. It turns out that the results calculated from the formula accord with the experimental results commendably.更多还原