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Development of Efficient Retrofit Method for Masonry Houses in Earthquake Prone Regions Considering Local availability, Applicability and Acceptability

考虑当地可用性、适用性和可接受性的地震多发地区砌体房屋高效改造方法的开发

基本信息

批准号：
14208043
负责人：
MEGURO Kimiro
金额：
$ 14.89万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Masonry structures are widely used due to its low cost and construction easiness especially in developing countries. In spite of the efforts to provide guidelines for the construction of sound earthquake resistant houses, every year casualties due to collapsing masonry houses during earthquakes are reported. Although it is clear that retrofitting the existing housing stock is urgent, it has not been implemented extensively. To overcome this situation, retrofitting techniques involving inexpensive construction materials available in remote regions and low-skill labor as well as aggressive educational campaigns are needed. This research project proposes an innovative retrofitting method for adobe/masonry houses, which consists of using polypropylene bands arranged in meshes. These bands, which are commonly used for packing, are resistant, inexpensive, durable and worldwide available.In the research, installation procedures are discussed and experiments for material properties and dynamic behavior of masonry structures with and without retrofit by proposed method are carried out to verify the suitability of the proposed technique. Although cracking is not prevented by PP-band meshes, they efficiently increase the structure seismic capacity, particularly its ductility. The proposed retrofitting method improved the structure performance allowing a life safety damage level for a masonry structure subjected to a JMAI 6+ shaking.

砖石结构因其成本低、施工方便而被广泛使用，特别是在发展中国家。尽管努力为建造坚固的抗震房屋提供指导，但每年都有因地震期间砖石房屋倒塌而造成人员伤亡的报道。尽管改造现有住房的紧迫性显而易见，但尚未得到广泛实施。为了克服这种情况，需要采用偏远地区廉价建筑材料和低技能劳动力的改造技术以及积极的教育活动。该研究项目提出了一种针对土坯/砖石房屋的创新改造方法，其中包括使用排列在网格中的聚丙烯带。这些带通常用于包装，具有耐用性、廉价性、耐用性，并且在全球范围内可用。在研究中，讨论了安装程序，并对采用所提出方法和未采用所提出方法进行改造的砌体结构的材料性能和动态行为进行了实验，以验证所提出技术的适用性。尽管PP带网格不能防止开裂，但它们有效地提高了结构的抗震能力，特别是其延展性。所提出的改造方法提高了结构性能，使遭受 JMAI 6+ 震动的砖石结构达到生命安全损伤水平。