后张预应力加固无构造柱砌体墙抗震性能试验

发布时间：2019-08-19 18:40

【摘要】：砌体结构的抗压强度远大于抗拉、抗剪强度,适合应用于受压为主的构件。由于其具有自重大,材料呈脆性,抗拉、抗剪、抗弯能力低等缺点,使得其抗震性能较差。针对农村地区砖砌体结构房屋抗震加固改造工程量大面广,所需资金缺口大、来源匮乏的现状,充分发挥后张预应力技术的优势,提出一种适用于既有砌体结构的新型抗震加固技术。在此基础上,通过5片构件(1片未加固墙片和4片加固墙片)抗震加固实验验证了此新型抗震加固方法的有效性和优越性。试验结果表明,与相同设计的未加固墙体相比,后张预应力加固无构造柱砖砌体墙体的抗剪承载力、变形能力和耗能能力均有大幅度提高,提高幅度高于2倍。该后张预应力加固既有砌体结构新技术具有施工简便、质量容易控制、工期较短、对结构影响小、造价低廉等优点,具有广阔的应用前景。
[Abstract]:The compressive strength of masonry structure is much greater than that of tensile and shear strength, so it is suitable for compression-based members. Because of its large self-weight, brittleness, tensile resistance, shear resistance, low bending capacity and so on, its seismic performance is poor. In view of the large quantity of seismic strengthening and reconstruction of brick masonry structure buildings in rural areas, the shortage of funds and the lack of sources, a new seismic reinforcement technology suitable for existing masonry structures is put forward in view of the present situation of giving full play to the advantages of post-tensioned prestress technology. On this basis, the effectiveness and superiority of the new seismic reinforcement method are verified by the seismic strengthening experiments of five members (1 unreinforced wall and 4 reinforced wall). The test results show that compared with the unstrengthened wall of the same design, the shear capacity, deformation capacity and energy consumption capacity of the post-tensioned prestressed brick masonry wall without structural column are greatly improved, which is more than 2 times higher than that of the unstrengthened wall. The new post-tensioned prestressed reinforcement technology has the advantages of simple construction, easy quality control, short construction period, little influence on the structure and low cost, so it has a broad application prospect.
【作者单位】：北京交通大学土木建筑工程学院;北京市建筑工程研究院有限公司;北京建工集团博士后科研工作站;北京建筑大学土木学院;
【基金】：中国博士后科学基金(2014M550020) 北京市博士后基金(2013zz-95)
【分类号】：TU364;TU352.11

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