Chinese Historic Buildings Fire Safety and Countermeasure

An, Zhengyang; Wang, Yuanyuan

doi:10.2991/emcs-16.2016.489

Cited by 3 publications

(2 citation statements)

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“…Under the effect of lightning current, glazed tiles are subjected to various types of damages, including fractures, breakage, and collapse; it can even lead to the burning of the entire building, resulting in incalculable losses. Among the factors that cause glazed tile damage in ancient buildings, lightning damage is one of the main natural disasters [3,4]. Therefore, it is necessary to study the causes and damage effects of lightning strikes on the roofing glazed tiles of ancient buildings and the corresponding damage effect, to provide a basis and reference for the formulation of lightning protection measures.…”

Section: Introductionmentioning

confidence: 99%

Artificial Lightning Strike Tests and Coupled Electrical–Thermal Analysis on Roofing Glazed Tiles of Ancient Buildings

Fang

et al. 2021

Preprint

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Lightning strike is one of the natural disasters to the roof components of ancient buildings. To investigate the causes and damage effects of lightning strikes on the roofing glazed tiles of ancient buildings, artificial lightning strike tests were carried out on glazed tiles. Based on the experiment results, a coupled electrical–thermal finite element model of mortar-containing glazed tiles was established and the Joule heat effect of lightning current was further investigated. The results show that when the lightning channel is attached to the surface of the enamel and body with a low electrical conductivity, the lightning current is mainly released in the form of surface flashover, and a minor damage is induced along the flashover path; when the lightning channel is attached to the mortar with a high electrical conductivity, the lightning current is injected into the mortar, resulting in significant tile damage. The spatial distributions of the temperature present clear gradient characteristics. The high-temperature area appears in the mortar while the high–thermal–stress area appears in the body connected to the grounding rail. As the peak of the lightning current increases, both the high-temperature and high–thermal–stress areas of the glazed tiles expand. The combination of the experiments and the numerical analysis results demonstrate that the damage mechanism of lightning Joule heat effect to glazed tiles may include two aspects. One is the internal explosive force generated from the sharp vaporization and expansion of the moisture inside the tiles due to rapid temperature increase, and the other is the thermal stress caused by the uneven temperature distribution.

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Section: Introductionmentioning

confidence: 99%

Artificial Lightning Strike Tests and Coupled Electrical–Thermal Analysis on Roofing Glazed Tiles of Ancient Buildings

Fang

et al. 2021

Preprint

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“…Historic buildings are an important cultural heritage since the potential historical and cultural values are precious and non-renewable [1]. However, a great many historic buildings in the world, unfortunately, had been destroyed because of the ravages of fire disasters [2][3][4][5], for example, the Gothic spire of the Notre Dame Cathedral [6], the National Museum of Brazil [7], the SHURI Castle World Heritage site [8] and so on.…”

Section: Introductionmentioning

confidence: 99%

The color change analysis of historic wooden remains after fire-suppression by fluorinated chemical gases

Yang

Zhou

et al. 2021

Herit Sci

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Many wooden Chinese historic buildings are destroyed due to the ravages of frequent fire disasters. The fire risk of historic buildings are highly enlarged since a long-time weathered wooden structures in the natural environment. The clean fire-extinguishing technology using fluorinated chemical gases to put out a historic building fire rapidly at the initial stage is highly recommended and widely used. However, the gaseous hydrogen fluoride (HF) yielded during the fire suppression process could be a potential method to result in secondary damage due to its corrosiveness. Nowadays, experiments were employed to clarify the effect of fire suppression on the surface of historic wooden buildings. Five traditional fluorinated chemical gases, H-37, FK-5-1-12, H-1323, H-2402, and H-1301, are used to suppress a fixed flame. The wooden samples, including a Dao Talisman board, a painting paper, and wooden chips, are placed in a chamber. Wooden chips consist of traditional and weathered samples (acting as the Chinese historic buildings). The concentration of gaseous products yielded from fire suppression are monitored by a gas-FTIR from ABB, and the surface analysis is conducted by a Quanta FEG SEM–EDX from FEI. It is observed that flame enhancement happens at the early stage of fire suppression and varies with fire agents. The amount of F-deposited on the wooden surface is positively correlated with a total amount of gaseous HF. The color change mechanism of the wooden surface is comprehensive, although the amount of HF is a leading factor. The influence of HF on color change depends on the amount of both gaseous H2O and HF. It is concluded that the value of L* of the traditional chip is much easier to be reduced comparing with weathered samples with the same wood grain. The reduction of $${\mathrm{b}}^{*}$$ b ∗ value of weathered samples is much larger than the traditional ones. It suggests the weathered chips show a color shift toward blue because of fire suppression. The present study hopes to provide a basic acknowledgment for the comprehensive understanding of secondary damage caused by fire suppression.

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Construction and Verification of Image Datasets for Fire Hazards in Cultural Relics Buildings

Zhong,

Liu,

Chen

et al. 2023

2023 4th International Seminar on Artificial Intelligence, Networking and Information Technology (AINIT)

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Chinese Historic Buildings Fire Safety and Countermeasure

Cited by 3 publications

References 0 publications

Artificial Lightning Strike Tests and Coupled Electrical–Thermal Analysis on Roofing Glazed Tiles of Ancient Buildings

Artificial Lightning Strike Tests and Coupled Electrical–Thermal Analysis on Roofing Glazed Tiles of Ancient Buildings

The color change analysis of historic wooden remains after fire-suppression by fluorinated chemical gases

Construction and Verification of Image Datasets for Fire Hazards in Cultural Relics Buildings

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