Piloti-type structure is a popular architectural style consisting of only columns or minimum number of shear-resisting walls on the first floor. The large difference in lateral stiffness between the first and the upper floors makes the structure very vulnerable to earthquakes. Through the recent earthquakes in Gyeongju (2016) and Pohang (2017), due to such structural disadvantages, many damage cases have been reported, especially in low-rise piloti-type buildings with five stories or less. In this study, seismic soil-structure interaction (SSI) analysis is conducted on low-rise piloti-type buildings considering Korean geotechnical characteristics, and the effect is analytically evaluated. To achieve this goal, seismic SSI analysis applying the measured Gyeongju earthquake and design response spectrum (DRM) based on the architectural design codes are conducted by constructing three-dimensional structural analysis models with a five-story piloti-type building and four different soil properties: fill (FI), alluvial soil (AS), weathered soil (WS), and weathered rock (WR). From the analysis results, it is found that WS soil is largely affected by the seismic SSI, and the influence of the seismic SSI is different for each soil type regardless of the type of earthquake. Through the parameter study, simple and reasonable estimates are proposed to consider the SSI effect on the base shear in low-rise piloti-type buildings.

中文翻译：

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考虑韩国岩土条件的Piloti型建筑的抗震性能和土-结构相互作用（SSI）评估

Piloti型结构是一种流行的建筑风格，一楼仅由柱子或最少数量的抗剪墙组成。第一层和上层之间横向刚度的巨大差异使该结构非常容易受到地震的影响。通过最近在庆州（2016 年）和浦项（2017 年）发生的地震，由于这些结构缺陷，报告了许多损坏案例，特别是在五层以下的低层领航式建筑中。在本研究中，考虑到韩国岩土工程特征，对低层导向型建筑进行了地震土-结构相互作用 (SSI) 分析，并对效果进行了分析评估。为了实现这一目标，地震 SSI 分析应用测量的庆州地震和基于建筑设计规范的设计响应谱 (DRM)，通过构建具有 5 层导向型建筑和四种不同土壤特性的三维结构分析模型：填充 (FI) 、冲积土 (AS)、风化土 (WS) 和风化岩 (WR)。从分析结果可以看出，WS 土壤受地震 SSI 的影响很大，并且无论地震类型如何，对于每种土壤类型，地震 SSI 的影响是不同的。通过参数研究，提出了简单合理的估计，以考虑SSI对低层导向型建筑基础剪力的影响。