Proposed vulnerability assessment model for masonry buildings on slow-moving landslides based on physical models and field observations

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2023-09-05 DOI:10.1007/s10064-023-03385-z

Qin Chen, Renato Macciotta, Lixia Chen, Kunlong Yin, Lei Gui, Ye Li

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Abstract

The collection of relevant information about the vulnerability of infrastructure damaged by landslides is not an easy task due to the existence of several compounding factors and uncertainties. This makes it difficult to quantitatively estimate their vulnerability to slow-moving landslides. This paper presents a new vulnerability assessment model for masonry buildings on slow-moving landslides based on physical models and field observations. A masonry building model is made of brick and concrete at a scale of 1:10 to physically simulate the damage in structures caused by ground tension cracks commonly developed on slow-moving landslides. The tension crack opening process is simulated through a load-controlled table with an aperture on which the building model is constructed. The strain on the wall and its foundation were measured, and the damage of the model (crack formation and evolution for each loading step) was collected, described, and analyzed. These data were used to develop failure criteria for masonry buildings in rural areas in China in terms of a quantitative vulnerability curve. The quantitative model of vulnerability for masonry structures was established based on fuzzy mathematics and the Weibull function applied on the test data and observations. The vulnerability curve is verified with field cases of masonry buildings damaged by ground tension cracks associated with slow-moving landslides in the Three Gorges Reservoir area. The results support further testing and use of vulnerability curve proposed.

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基于物理模型和现场观测，提出了缓动滑坡中砌体建筑易损性评价模型

由于存在多种复合因素和不确定性，收集有关滑坡破坏基础设施脆弱性的相关信息并非易事。这使得难以定量估计它们对缓慢移动的山体滑坡的脆弱性。本文提出了一种基于物理模型和现场观测的缓动滑坡砌体建筑物易损性评价新模型。砌体建筑模型是由砖和混凝土按1:10的比例制成的，以物理模拟缓慢移动的滑坡中常见的地面张拉裂缝对结构造成的破坏。通过带孔的荷载控制平台模拟了张裂缝的张开过程，并在该平台上建立了建筑模型。测量了墙体及其基础上的应变，并收集、描述和分析了模型的损伤(每个加载步骤的裂纹形成和演化)。这些数据被用于制定中国农村地区砌体建筑的定量脆弱性曲线的破坏准则。基于模糊数学，将威布尔函数应用于试验数据和观测数据，建立了砌体结构易损性定量模型。通过三峡库区缓动滑坡伴地张裂缝砌体建筑的现场实例验证了该易损性曲线。结果支持进一步测试和使用所提出的漏洞曲线。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.