EXPERIMENTAL STUDY ON RETROFIT TECHNOLOGIES FOR RC FRAMES WITH INFILLED BRICK MASONRY WALLS IN DEVELOPING COUNTRIES
EXPERIMENTAL STUDY ON RETROFIT TECHNOLOGIES FOR RC FRAMES WITH INFILLED BRICK MASONRY WALLS IN DEVELOPING COUNTRIES
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发展中国家填充砖墙RC框架改造技术试验研究
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Andrei Papurcu
中科院分区：
文献类型：
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作者：
M. Seki;V. Popa;Eugen Lozincă;A. Dutu;Andrei Papurcu
世界上地震多发地区的发展中国家仍在遭受大量人员伤亡和建筑物破坏。这些损坏可能是由于工程师的结构设计不当和/或建筑工程的质量控制不善造成的。为了对发展中国家既有钢筋混凝土(RC)建筑的减灾做出贡献，应根据当地的材料和施工工艺，开发出经济、易用的加固方法。为此，在罗马尼亚布加勒斯特土木工程技术大学(UTCB)开展了一个项目，目的是找到一种可在发展中国家轻松应用、成本尽可能低的解决方案。考虑了两种翻新方案：一种是在钢筋混凝土框架内输入木质框架砌块，只用砂浆连接到钢筋混凝土框架上；另一种是在砖砌块填充上使用两层铁丝网。试验共进行了5个试件：1个裸露的钢筋混凝土框架，1个木垫层和砖砌块填充的钢筋混凝土框架，1个砖砌块填充的钢筋混凝土框架，1个木框架填充的钢筋混凝土框架，1个用两层钢丝网和砂浆(钢丝网)加固的钢筋混凝土框架。为了适应反应框架，测试样品被按半比例缩放。混凝土抗压强度约为14 Mpa，砌块棱柱强度约为11 Mpa。这些值相当低，旨在模拟发展中国家的低材料质量。进行了循环加载试验，得到了极限破坏模式、最大强度、最大水平漂移等行为特征，并对其进行了讨论。
The developing countries in the earthquake prone regions in the world are still suffering a lot of casualties as well as building damage. These damages might be caused by inadequate structural design by engineers and/or poor quality control of construction works. In order to contribute to disaster mitigation for existing reinforced concrete (RC) buildings in developing countries, economic and easy to apply retrofit methods should be developed based on the local materials and the construction technologies. For this reason, a project was conducted in Technical University of Civil Engineering of Bucharest, Romania (UTCB) aiming to find a solution that can be easily applied in the developing countries and with as low cost as possible. Two retrofit solutions were considered: one with timber framed masonry panels input inside the RC frame, connected just with mortar to the RC frame and the other using two layers of wire mesh applied on a brick masonry infill. Five specimens were tested: one bare RC frame, one RC frame with timber cushion and brick masonry infill, one RC frame with brick masonry infill, one RC frame with timber framed masonry infill and one RC frame with brick masonry infill strengthened by two layers of wire mesh and mortar (ferrocement), respectively. The test specimens are a half-scaled in order to fit in the reaction frame. The concrete compressive strength is about 14 MPa, and masonry prism strength of is about 11 MPa. These values are quite low aiming to simulate the low material quality in developing countries. The cyclic loading test was performed and the ultimate failure mode, maximum strength, maximum horizontal drift and other behavior characteristics were obtained and are discussed in this paper.