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Evaluation of Seismic Capacity of Existing Reinforced Concrete Structures in Turkey

土耳其现有钢筋混凝土结构的抗震能力评估

基本信息

批准号：
09044181
负责人：
OKADA Tsuneo
金额：
$ 2.5万
依托单位：
Shibaura Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

Rapid urbanization and industrialization cause serious structural problems in and around big metropolises. One of these big cities in the world is Istanbul that is located on a seismically active region of Anatolian peninsula.In TURKEY, it is common that the partitioning walls and external walls were made by hollow bricks with plaster finish in almost of all modern reinforced concrete buildings, and with few RC share walls. We have done micro-tremor measurements on more than 10 RC-buildings in ISTANBUL, including bear frame under construction for the purpose to know their dynamical characteristics, We have also take measurements on 10 buildings in DINAR and in ADANA, where have been damaged seriously to sever earthquakes.And we have examined Seismic Index Evaluation method on some buildings of them to estimate their strength and ductility.We have also investigated damage to buildings by the 1995 DINAR Earthquake, and the 1998 ADANA-CEYHAN Earthquake.Results of this investigation were given as under.1)Rigidities of the RC buildings in Turkey were quite different between bear frame and finished with hollow bricks and mortar.2)Predominant period of RC buildings will become very long after damaged by large ground motion compare with non-damaged structures.3)Ductility of RC frames were very poor compare with them in Japan.4)Quality of concrete was very poor too.5)Quality of works for reinforcement was not good, because lack of knowledge about arrangement of reinforcement.6)Walls made by Hollow bricks were very brittle, and never could sustain any axial force, then RC structures in Turkey have no redundancies to collapses of columns.We have to start improvement immediately, design methods and construction technique, strength, ductility, quality of concrete, technique of reinforcement arrangement, to avoid losing living space and lives at severe earthquake.

快速的城市化和工业化在大都市及其周边地区造成了严重的结构性问题。伊斯坦布尔是世界上最大的城市之一，它位于安纳托利亚半岛的地震活跃区。在土耳其，几乎所有的现代钢筋混凝土建筑物的隔墙和外墙都是由空心砖制成的，并且很少有钢筋混凝土共用墙。我们已经对伊斯坦布尔的10多座钢筋混凝土建筑物进行了微动测量，包括正在建造的承重框架，以了解其动力特性。我们还对第纳尔和阿达纳的10座建筑物进行了测量。在地震破坏严重的地区，我们对其中的一些建筑物进行了抗震指标评估，以评估其强度和延性，并对这些建筑物的抗震性能进行了评估。调查了1995年第纳尔地震对建筑物的破坏，研究结果表明：（1）土耳其钢筋混凝土结构在承重框架和空心砖砂浆饰面之间的刚度差异较大;（2）在大地震作用下，钢筋混凝土结构的卓越周期比未受破坏的结构要长;（3）在地震作用下，钢筋混凝土结构的卓越周期比未受破坏的结构要长;钢筋混凝土框架的延性与日本相比非常差。4）混凝土质量也很差。5）加固工程质量不好，因为缺乏对水泥布置的了解。6）空心砖制成的墙壁非常脆，无法承受任何轴力，因此土耳其的钢筋混凝土结构没有多余的柱倒塌。我们必须立即开始改善。设计方法和施工技术、强度、延性、混凝土质量、配筋技术，避免在强烈地震中失去居住空间和生命。