Abstract

The new administrative capital city area in Egypt, planned to be constructed in the area between Cairo and Suez cities, is vulnerable to moderate and strong earthquakes, which are inevitable in the region. The moderate size recent earthquake with local magnitude 4.2 took place in the vicinity of administrative capital area on 31st of December 2018. The focal mechanism and ground motion characterization of this event using full waveform inversion and first P-wave polarity techniques are fundamentally studied. This earthquake was simulated at the new administrative capital city area to study the effect of magnitude and source to site distance on the ground motion. Moreover, the seismotectonic setting of the new administrative capital city area is well studied using other earthquakes that have occurred in and around it. Reduction of damage in the administrative capital city area from earthquake ground shaking requires modern building codes that are continuously updated to reflect the effects of ground motions on constructions. This research provides u-p‑to-date, essential and basic seismological results for use in the development and implementation of modern building codes and regulations in Egypt. The most important product, for immediate application by practitioners and policy makers in the region, is the newly developed local seismic hazard charts, which displays the ground acceleration values at different spectral periods. These charts provide the basic seismic input parameter that is considered in all modern building codes containing a-seismic design provisions. Also, artificial earthquake accelerograms were generated for use by the earthquake engineer in the nonlinear dynamic analysis of new or existing structures.

中文翻译：

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埃及新行政首府城市地区近期地震，地震危险和地震构造背景的建模

摘要

埃及计划在开罗和苏伊士两市之间的地区建造新的行政首府城市地区，该地区容易遭受中度和强烈地震。2018年12月31日，在行政首都地区附近发生了近中度4.2级的近期地震。使用全波形反演和第一个P对该事件的震源机制和地震动特征进行了描述从根本上研究了波极性技术。在新的行政首府城市地区模拟了这次地震，以研究震级和震源到站点距离对地面运动的影响。此外，对新行政首府城市地区的地震构造环境进行了很好的研究，并使用了该地区及其周围发生的其他地震。为了减少行政首府地区因地震引起的地面震动而造成的损害，需要不断更新的现代建筑规范以反映地震动对建筑的影响。这项研究提供了最新的，基本的和基本的地震结果，可用于埃及现代建筑法规的制定和实施。最重要的产品，可供该地区的从业人员和决策者立即使用，是新近开发的当地地震灾害图，显示了不同频谱周期的地面加速度值。这些图表提供了基本的地震输入参数，所有包含a-抗震设计规定的现代建筑规范都考虑了这些参数。此外，还生成了人工地震加速度图，供地震工程师用于对新结构或现有结构进行非线性动力分析。