2016年4月厄瓜多尔Pedernales 7.8级地震后建筑材料在R/C建筑倒塌中的作用

Fabricio Yépez , Oswaldo Yépez
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引用次数: 13

摘要

厄瓜多尔Pedernales 7.8级地震发生后,7000多座钢筋混凝土(R/C)建筑被毁。本文对此类建筑中使用的混凝土材料作为可能的易损源进行了研究。它们已经过分析和测试(实验室和扫描电镜)。发现的证据证实,建筑材料的质量远远不能接受,施工实践非常差。使用海砂对钢筋的腐蚀程度非常高,混凝土中使用的粗骨料的糜棱化产生了非常低强度的材料。这些事实是造成数千座建筑物损坏和倒塌的主要原因。
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Role of construction materials in the collapse of R/C buildings after Mw 7.8 Pedernales – Ecuador earthquake, April 2016

More than 7000 reinforced concrete (R/C) buildings were destroyed after the Mw 7.8 Pedernales earthquake in Ecuador. In this paper, concrete materials used in such buildings are studied as a possible source of vulnerability. They have been analyzed and tested (lab and SEM). Evidence found confirmed that quality of construction materials is far from acceptable, and construction practices applied were very poor. Use of sea sand caused very high corrosion level in steel bars and mylonitization of coarse aggregates used in concrete produced very low strength materials. Those facts were the main reasons of damage and collapse of thousands of buildings.

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Editorial Board Seismic vulnerability assessment of an Italian historical masonry dry dock Role of construction materials in the collapse of R/C buildings after Mw 7.8 Pedernales – Ecuador earthquake, April 2016 Editorial Board Fundamental period elongation of a RC building during the Pollino seismic swarm sequence
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