Abstract
Based on the concept of environmental protection of solid waste utilization, material testing is conducted to achieve native improvement using coal gangue-based limestone-calcined clay cement (LC3). Finite element (FE) models of rural raw-soil architecture with a colored-steel roof (RACSR) were established. The effect of modified soil type and seismic character on the vulnerability of single-story raw-soil structures was investigated using probabilistic seismic demand (PSD) analysis. The seismic response characteristics of 80 representative sequences were comparatively investigated when subjected to northwest clay (raw soil) of China, fiber and stone-improved clay (modified soil), and coal gangue-based limestone-calcined clay cement (LC3 soil). The maximum interstory drift angle (ISDAmax) was lower in the LC3 soil model and the modified soil model compared to the raw-soil model. The use of LC3 soil improves structural resistance and reduces the damage probability of a structure, and the influence of different ultimate failure states on the vulnerability of the raw-soil structure was studied.
Highlights
Earthquakes are natural catastrophes that severely impact society owing to the associated loss of life and damage to building facilities
Wang [32] added recycled starch, quicklime, and hydrated lime to the raw soil, which were used in raw soil in mountainous areas. e compression and shear properties of the modification materials were tested and analyzed, and the results showed that the recycled starch was suitable for addition to the original soil
(2) Compared to the raw-soil raw-soil architecture with a colored steel roof (RACSR) model, the roof displacement and interstory drift angle (ISDA) of the modified soil and LC3 soil RACSR models are both reduced to varying degrees, and the damage probability values for different damage limit states of the RACSR model are significantly lower. erefore, it is necessary to improve the soil mechanics in rural raw-soil structures to enhance their structural integrity, reduce their seismic responses, and effectively mitigate the risk of severe structural damage or collapse
Summary
Earthquakes are natural catastrophes that severely impact society owing to the associated loss of life and damage to building facilities. Li et al [18] discussed the seismic vulnerability and spatial distribution of native soil buildings in western China and proposed a multidimensional information acquisition survey method He et al [19] conducted a statistical analysis of the damage and economic losses caused by 80 earthquake disasters in Yunnan Province from 1993 to 2015 and obtained vulnerability curves for different seismic intensities and building structures. A probabilistic seismic demand model of the rural raw-soil structure was established, and the vulnerability curves were obtained under different working conditions On this basis, the effects of different raw-soil improvement methods on the seismic response and fragility of raw-soil structures were rigorously investigated, and the influence of different limit failure states on the seismic vulnerability of rural raw-soil structures was examined
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