Yakut Ahmet, Sucuoğlu Halûk, Binici Baris, Canbay Erdem, Donmez Cemalettin, İlki Alper, Caner Alp, Celik Ozan Cem, Ay Bekir Özer
Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
Department of Civil Engineering, İzmir Institute of Technology, İzmir, Turkey.
Bull Earthq Eng. 2022;20(14):7793-7818. doi: 10.1007/s10518-021-01226-6. Epub 2021 Sep 13.
The October 30, 2020 Earthquake caused unexpectedly significant damage in İzmir considering its distance to the city. This paper evaluates the recorded ground motions, summarizes the performance of structures affected from the earthquake with emphasis on the reasons of damage. A detailed damage assessment was carried out by the Earthquake Engineering Research Center of Middle East Technical University to compile data on the damage of RC and masonry buildings. It was observed that majority of the damage was concentrated in the Bayraklı district due to its peculiar soil properties where many 7-10 story mid-rise RC buildings suffered heavy damage and collapse. The level of amplified ground motions combined with deficiencies of apparently non-code compliant buildings exacerbated the damage. The main reasons of damage were mainly attributed to the presence of soft stories, lack of proper detailing, poor construction quality, presence of heavy overhangs, and hence significant lack of code-compliance in essence. The influence of infill walls on seismic performance of deficient and inadequate buildings was clearly seen in this earthquake. This paper also discusses seismic code requirements in effect and their influence on the observed building performance. The recorded ground motions were compared with the code spectra to evaluate the performance of the buildings. The code response spectra were found to be well above the recorded ground motion spectra at the sites where significant damage was observed.
考虑到距离伊兹密尔市的距离，2020年10月30日的地震造成了意想不到的重大破坏。本文评估了记录的地面运动，总结了受地震影响的结构的性能，并重点分析了破坏原因。中东技术大学地震工程研究中心进行了详细的破坏评估，以收集钢筋混凝土和砖石建筑的破坏数据。据观察，由于拜拉克利区特殊的土壤特性，大部分破坏集中在该地区，许多7至10层的中高层钢筋混凝土建筑遭受了严重破坏和倒塌。地面运动放大水平加上明显不符合规范的建筑缺陷加剧了破坏。破坏的主要原因主要归因于软层的存在、缺乏适当的细节设计、施工质量差、存在厚重的悬挑，从本质上讲，严重缺乏规范符合性。在这次地震中，可以清楚地看到填充墙对有缺陷和不足的建筑抗震性能的影响。本文还讨论了现行的地震规范要求及其对观察到的建筑性能的影响。将记录的地面运动与规范谱进行比较，以评估建筑物的性能。在观察到重大破坏的地点，发现规范反应谱远高于记录的地面运动谱。
