Piloti-type reinforced concrete building structures have vertically irregular configurations composing a moment frame for parking spaces in the lower story and heavy-weight shear wall system for residential spaces in the upper stories. Due to these vertically irregular configurations, such building structures are governed by a soft-story mechanism, damage concentration on the first story. Since the 2017 Pohang earthquake led to severe damage to the piloti-type building structures on a regional level, a decision-making tool mitigating the seismic damage for future events is needed. This paper aimed to propose a rapid decision-making tool promptly estimating seismic damage with simple information and determining a retrofit scheme using a pre-developed extensive database, i.e., multi-dimensional structural parameter surfaces. The multi-dimensional surfaces were created using a simplified modeling approach with five structural parameters: period, strength ratio, and ductility controlling failure modes as the input, and peak inter-story drift ratio and demand-to-capacity ratio as the output. The proposed methodology was validated using a finite element model for the piloti-type building structure with a soft-story mechanism. The seismic responses detected from the multi-dimensional surfaces have a slight difference from those of the numerical model. Nevertheless, the rapid tool predicted a reasonable agreement with performance evaluation from the finite element simulation. In addition, the rapid tool provided feasible retrofit options to meet target performance using brief structural information. Due to its simplified process, the proposed tool can be implemented to the regional seismic assessment for the residential areas where the piloti-type building structures were highly concentrated.

Piloti型钢筋混凝土建筑结构具有垂直不规则的配置，构成了下层停车位的力矩框架和上层住宅空间的重磅剪力墙系统。由于这些垂直不规则的配置，这种建筑结构由软层机制控制，损坏集中在第一层。由于 2017 年浦项地震导致区域层面的先导式建筑结构受到严重破坏，因此需要一种决策工具来减轻未来事件的地震破坏。本文旨在提出一种快速决策工具，利用简单的信息迅速估计地震破坏，并使用预先开发的广泛数据库（即多维结构参数表面）确定改造方案。多维表面是使用简化的建模方法创建的，其中包含五个结构参数：周期、强度比和延展性控制失效模式作为输入，峰值层间漂移比和需求容量比作为输出。所提出的方法使用有限元模型进行了验证，该模型用于具有软层机制的piloti 型建筑结构。从多维表面检测到的地震响应与数值模型的地震响应略有不同。尽管如此，快速工具预测与有限元模拟的性能评估合理一致。此外，快速工具提供了可行的改造选项，以使用简短的结构信息来满足目标性能。由于流程简单，