Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055769
Jinsong Zhu, Wei Li, Lin Da
In recent years, fire-fighting robots have been widely used to replace firefighters in dangerous environments, which has attracted the attention of more and more researchers. However, accurate fire location is an important prerequisite for quick and accurate water injection into the fire. In this paper, a variable baseline distance stereo vision system based on sub-pixel detection is proposed and its effectiveness is verified by experiments. The application of sub-pixel detection method in calibrating stereo vision system can significantly improve the accuracy and stability of fire positioning. However, with the increase of fire distance, the positioning error would increase significantly, which is unavoidable. The experimental results show that the increase of the baseline distance can effectively suppress the increase of the positioning error under the baseline distances of 186mm, 249mm and 438mm. Therefore, after an appropriate baseline distance is matched, the variable baseline distance stereo vision system based on sub-pixel detection can be used for fire positioning of wider range. The system demonstrates outstanding potential of being carried on firefighting robots to perform automated firefighting missions and providing reasonable data reference for making firefighting decisions.
{"title":"A Variable Baseline Distance Stereo Vision System for Fire Localization Based on Sub-pixel Detection","authors":"Jinsong Zhu, Wei Li, Lin Da","doi":"10.1109/ICFSFPE48751.2019.9055769","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055769","url":null,"abstract":"In recent years, fire-fighting robots have been widely used to replace firefighters in dangerous environments, which has attracted the attention of more and more researchers. However, accurate fire location is an important prerequisite for quick and accurate water injection into the fire. In this paper, a variable baseline distance stereo vision system based on sub-pixel detection is proposed and its effectiveness is verified by experiments. The application of sub-pixel detection method in calibrating stereo vision system can significantly improve the accuracy and stability of fire positioning. However, with the increase of fire distance, the positioning error would increase significantly, which is unavoidable. The experimental results show that the increase of the baseline distance can effectively suppress the increase of the positioning error under the baseline distances of 186mm, 249mm and 438mm. Therefore, after an appropriate baseline distance is matched, the variable baseline distance stereo vision system based on sub-pixel detection can be used for fire positioning of wider range. The system demonstrates outstanding potential of being carried on firefighting robots to perform automated firefighting missions and providing reasonable data reference for making firefighting decisions.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"48 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82235131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055761
Yilin Chen, Diance Gao, Xiangfeng He, D. Liang
In order to reduce the number of fires and the damage caused, it is crucial to clear potential fire hazard. Currently, exclusion of potential fire hazard mainly relies on manual inspection, which fails to satisfy the high reliability and advance demand of the serious fire control condition. Based on the characteristic of potential fire hazard, this paper analyses the advantages and disadvantages of various exclusion technique and proposes a method of mobile image analysis system, providing a more accurate, immediate, intelligent and comprehensive way of fire hazard exclusion.
{"title":"A Discussion about the Application of Image Analysis Technique in Potential Fire Hazard Exclusion","authors":"Yilin Chen, Diance Gao, Xiangfeng He, D. Liang","doi":"10.1109/ICFSFPE48751.2019.9055761","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055761","url":null,"abstract":"In order to reduce the number of fires and the damage caused, it is crucial to clear potential fire hazard. Currently, exclusion of potential fire hazard mainly relies on manual inspection, which fails to satisfy the high reliability and advance demand of the serious fire control condition. Based on the characteristic of potential fire hazard, this paper analyses the advantages and disadvantages of various exclusion technique and proposes a method of mobile image analysis system, providing a more accurate, immediate, intelligent and comprehensive way of fire hazard exclusion.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"47 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73059620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Membrane structure coal shed is now widely used because of its economic, environment-friendly, convenient and fast construction. As a new type of building, there is a large amount of combustible coal stored in it, and its fire risk is self-evident. Therefore, it is necessary to ensure the safety of personnel under fire and the integrity of the building itself to meet its fire protection requirements. Based on a case of coal storage shed project, this paper tests and characterizes the ignition point and heat release of membrane structural materials, and carries out numerical simulation of fire in membrane structure coal shed. The structural stability under fire was analyzed by its temperature field, smoke spread and heat flow radiation. The results show that the critical ignition temperature of the membrane is 302.2 °C and the critical pilot heat flow is 16.5 kW/m2. Through the FDS numerical simulation of the membrane structure coal shed fire, the maximum temperature of the membrane structure surface in fire scenes 1 and 2 is 120 and 65 °C, respectively, and the heat flow is 5 and 2.5 kW/m2, which is lower than the critical ignition temperature obtained by the experiment. The critical ignition heat flow does not cause the membrane structure coal shed to be burned out of the hole, thereby affecting its structural stability. The visibility of smoke in fire scene 1 is not less than 10 m at 1350 s, while the visibility of smoke in fire scene 2 is less than 2 m at 1350 s, which seriously affects the safe evacuation of personnel. The membrane structure coal shed is a kind of air-powered fully enclosed structure. The air control inside the coal shed is very strict. Therefore, the corresponding air replacement system should be set to meet the safety under fire.
{"title":"Fire Risk Analysis of Air-supported Membrane Structure Coal Storage Shed","authors":"Guoqiang Chai, Guoqing Zhu, Jinju Zhou, Zhan Wang, Shuai Gao, Yunji Gao","doi":"10.1109/ICFSFPE48751.2019.9055817","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055817","url":null,"abstract":"Membrane structure coal shed is now widely used because of its economic, environment-friendly, convenient and fast construction. As a new type of building, there is a large amount of combustible coal stored in it, and its fire risk is self-evident. Therefore, it is necessary to ensure the safety of personnel under fire and the integrity of the building itself to meet its fire protection requirements. Based on a case of coal storage shed project, this paper tests and characterizes the ignition point and heat release of membrane structural materials, and carries out numerical simulation of fire in membrane structure coal shed. The structural stability under fire was analyzed by its temperature field, smoke spread and heat flow radiation. The results show that the critical ignition temperature of the membrane is 302.2 °C and the critical pilot heat flow is 16.5 kW/m2. Through the FDS numerical simulation of the membrane structure coal shed fire, the maximum temperature of the membrane structure surface in fire scenes 1 and 2 is 120 and 65 °C, respectively, and the heat flow is 5 and 2.5 kW/m2, which is lower than the critical ignition temperature obtained by the experiment. The critical ignition heat flow does not cause the membrane structure coal shed to be burned out of the hole, thereby affecting its structural stability. The visibility of smoke in fire scene 1 is not less than 10 m at 1350 s, while the visibility of smoke in fire scene 2 is less than 2 m at 1350 s, which seriously affects the safe evacuation of personnel. The membrane structure coal shed is a kind of air-powered fully enclosed structure. The air control inside the coal shed is very strict. Therefore, the corresponding air replacement system should be set to meet the safety under fire.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"98 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73328693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055779
Zi-nan Chen, Y. Xiong, Hai Lin, Menglin Liu, Chen Wang, Jinbo Gu, Maozhou Liao, P. Lin
Through the scale tunnel experiment, the effect of different gradients on the temperature distribution and longitudinal velocity of tunnel fire is studied. The experimental results show that the slope affects the temperature distribution of upstream and downstream, but there is a compensation effect. That is, the larger the downstream temperature rise caused by the slope effect, the smaller the upstream temperature rise correspondingly. At the same time, the heat release rate is also an important factor that affects the longitudinal velocity and temperature distribution under low slope situation and these characteristics are only related to the slope under high slope situation.
{"title":"Study on the Effect of Slope on Tunnel Fire Characteristics","authors":"Zi-nan Chen, Y. Xiong, Hai Lin, Menglin Liu, Chen Wang, Jinbo Gu, Maozhou Liao, P. Lin","doi":"10.1109/ICFSFPE48751.2019.9055779","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055779","url":null,"abstract":"Through the scale tunnel experiment, the effect of different gradients on the temperature distribution and longitudinal velocity of tunnel fire is studied. The experimental results show that the slope affects the temperature distribution of upstream and downstream, but there is a compensation effect. That is, the larger the downstream temperature rise caused by the slope effect, the smaller the upstream temperature rise correspondingly. At the same time, the heat release rate is also an important factor that affects the longitudinal velocity and temperature distribution under low slope situation and these characteristics are only related to the slope under high slope situation.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"87 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81202693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To study the influence of the longitudinal ventilation on the mass flow rates of the fire smoke in the tunnel, several experiments have been conducted in a reduced-scale model tunnel (with a scale of 1/3). During the experiments, the variations of the mass flow rates of the fire smoke are deduced by the measured ceiling temperatures instead of being directly recorded. It concludes that the mass flow rates of the fire smoke are influenced by the longitudinal air flow. When the dimensionless longitudinal velocity is not larger than 0.19, the mass flow rates of the tunnel fire smoke at the upstream side and the downstream side are equals to each other and keep unchanged. When the dimensionless longitudinal velocity grows larger than 0.19, the two parameters begin to change and are no longer equal.
{"title":"Experimental Investigation on the Distribution of the Mass Flow Rate of Fire Smoke in a Longitudinally Ventilated Tunnel","authors":"Jun-heng Wang, Zheng Fang, Jianping Yuan, Zhi Tang","doi":"10.1109/ICFSFPE48751.2019.9055812","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055812","url":null,"abstract":"To study the influence of the longitudinal ventilation on the mass flow rates of the fire smoke in the tunnel, several experiments have been conducted in a reduced-scale model tunnel (with a scale of 1/3). During the experiments, the variations of the mass flow rates of the fire smoke are deduced by the measured ceiling temperatures instead of being directly recorded. It concludes that the mass flow rates of the fire smoke are influenced by the longitudinal air flow. When the dimensionless longitudinal velocity is not larger than 0.19, the mass flow rates of the tunnel fire smoke at the upstream side and the downstream side are equals to each other and keep unchanged. When the dimensionless longitudinal velocity grows larger than 0.19, the two parameters begin to change and are no longer equal.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"106 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75148399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055807
Guoliang Zhang, Changhai Li, Shouxiang Lu
Based on the recent frequently-occurred fire in high-rise hospitals, the paper took the fire caused by the thermal insulation material of the outer wall that took place at a high-rise hospital somewhere as an example to analyze and summarize the fire disposal. After that, through the field testing of evacuation under various circumstances, the paper compared the fire in the example and other fire cases of the same kind to conclude the difficulties and features of fire evacuation in high-rise hospitals, and proposed certain suggestions for the application of evacuation strategies and the targeted fire-fighting rescue preparation in the disposal of such kind of fires.
{"title":"Analysis of Fire Evacuation in High-rise Hospitals from a High-rise Hospital Fire Case","authors":"Guoliang Zhang, Changhai Li, Shouxiang Lu","doi":"10.1109/ICFSFPE48751.2019.9055807","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055807","url":null,"abstract":"Based on the recent frequently-occurred fire in high-rise hospitals, the paper took the fire caused by the thermal insulation material of the outer wall that took place at a high-rise hospital somewhere as an example to analyze and summarize the fire disposal. After that, through the field testing of evacuation under various circumstances, the paper compared the fire in the example and other fire cases of the same kind to conclude the difficulties and features of fire evacuation in high-rise hospitals, and proposed certain suggestions for the application of evacuation strategies and the targeted fire-fighting rescue preparation in the disposal of such kind of fires.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"51 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76837499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055797
Warda Rafaqat, Weiguo Song, Muhammad Ahmad Niaz
Due to recent economic development of China, toxic chemicals like Chlorine are manufactured and transported even more and hence the accidental release of Chlorine gas and the disasters is increasing day by day. Potential for disaster occurrence increases with the rise in population density, it also depends on the location and weather conditions and ground roughness as well. Coastal areas such as Boao town are at high risk as chemicals like Chlorine are usually traded through ships and wharf points near urban areas are always consider as threat zones. For the risk assessment of Chlorine gas toxicity, we took a wharf point of Boao town as a sample location. Heavy gas dispersion model is utilized to predict the area at risk in case of accidental release of Chlorine gas from a ship. This model helps to estimate the vulnerable area, based on chemical condition of the substance and meteorological conditions. Three different threat zones are created for three weather conditions based on prevailing seasons, and hence the affected area is calculated in different scenarios. For calculating the vulnerable population, the zonal statistical tools and geographical information tools are also been used, which helps us determine the population needed to evacuate and rescue immediately. Hazard and vulnerability maps can be used by the decision makers for better planning.
{"title":"Hazard Mapping and Vulnerable Population Estimation of Chlorine Gas Dispersion","authors":"Warda Rafaqat, Weiguo Song, Muhammad Ahmad Niaz","doi":"10.1109/ICFSFPE48751.2019.9055797","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055797","url":null,"abstract":"Due to recent economic development of China, toxic chemicals like Chlorine are manufactured and transported even more and hence the accidental release of Chlorine gas and the disasters is increasing day by day. Potential for disaster occurrence increases with the rise in population density, it also depends on the location and weather conditions and ground roughness as well. Coastal areas such as Boao town are at high risk as chemicals like Chlorine are usually traded through ships and wharf points near urban areas are always consider as threat zones. For the risk assessment of Chlorine gas toxicity, we took a wharf point of Boao town as a sample location. Heavy gas dispersion model is utilized to predict the area at risk in case of accidental release of Chlorine gas from a ship. This model helps to estimate the vulnerable area, based on chemical condition of the substance and meteorological conditions. Three different threat zones are created for three weather conditions based on prevailing seasons, and hence the affected area is calculated in different scenarios. For calculating the vulnerable population, the zonal statistical tools and geographical information tools are also been used, which helps us determine the population needed to evacuate and rescue immediately. Hazard and vulnerability maps can be used by the decision makers for better planning.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"27 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81166942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055864
Tingguang Ma, Xiaoliang Zhang, Xiansheng Song
Oxygen plays a duel role on mixture safety as a heat source and a heat sink. For the variable oxygen in a compartment (a type I problem), oxygen level in background air determines the upper limit of the fuel. For the oxygen in a fuel stream (a type II problem) in air, the oxygen will change the thermal properties of the fuel like a diluent or a fuel. Here both problems are solved with the thermal balance method. A new method, the flammable resistance method, can solve the type II problem more easily. It is equivalent with the thermal balance method, but with a perfect form like the Le Chatelier's Rule. Both methods are useful in assessing the danger of a flammable fuel stream containing oxygen.
{"title":"The Oxygen Effect on Mixture Flammability","authors":"Tingguang Ma, Xiaoliang Zhang, Xiansheng Song","doi":"10.1109/ICFSFPE48751.2019.9055864","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055864","url":null,"abstract":"Oxygen plays a duel role on mixture safety as a heat source and a heat sink. For the variable oxygen in a compartment (a type I problem), oxygen level in background air determines the upper limit of the fuel. For the oxygen in a fuel stream (a type II problem) in air, the oxygen will change the thermal properties of the fuel like a diluent or a fuel. Here both problems are solved with the thermal balance method. A new method, the flammable resistance method, can solve the type II problem more easily. It is equivalent with the thermal balance method, but with a perfect form like the Le Chatelier's Rule. Both methods are useful in assessing the danger of a flammable fuel stream containing oxygen.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"51 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85164384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055784
Xuedan Zhao, Jun Zhang, Weiguo Song, Hongliu Li, Long Xia
Fluorochemical industry is one of the newly developed industries, from which products are widely used in daily life. However, many dangerous chemicals are involved in the production process of fluorochemical, which are prone to cause many accidents such as poisonous gas leaks, gas explosions, fires, human intoxication and so on, endangering people's lives and property. Therefore, it is really necessary to analyze and evaluate the emergency management capability of fluorochemical plant. In this paper, we establish a fault tree for the emergency management failure of fluorochemical plant in fires, and give the corresponding evaluation index system of emergency management capability. In addition, to evaluate the emergency management capability of fluorochemical plant, an artificial neural network based method is proposed to expand the technology of capability assessment for emergency management.
{"title":"Capability Assessment for Emergency Management of Fluorochemical Plant in Fires","authors":"Xuedan Zhao, Jun Zhang, Weiguo Song, Hongliu Li, Long Xia","doi":"10.1109/ICFSFPE48751.2019.9055784","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055784","url":null,"abstract":"Fluorochemical industry is one of the newly developed industries, from which products are widely used in daily life. However, many dangerous chemicals are involved in the production process of fluorochemical, which are prone to cause many accidents such as poisonous gas leaks, gas explosions, fires, human intoxication and so on, endangering people's lives and property. Therefore, it is really necessary to analyze and evaluate the emergency management capability of fluorochemical plant. In this paper, we establish a fault tree for the emergency management failure of fluorochemical plant in fires, and give the corresponding evaluation index system of emergency management capability. In addition, to evaluate the emergency management capability of fluorochemical plant, an artificial neural network based method is proposed to expand the technology of capability assessment for emergency management.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"24 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85068833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055836
Kai Xiang, Yanchong Pan
The bond strength between steel tube and concrete is the foundation to ensure the good mechanical properties of concrete-encased concrete-filled steel tubular (CFST) columns. At present, there is little research on the residual bond strength between steel tube and outside concrete after high temperature cooling. The effect of heating and cooling on the residual bond strength between the steel tube and outside concrete is investigated in this paper. A total of ten specimens, including one unheated specimen and nine heating and cooling specimens, were tested to investigate the residual bond strength of steel tube and outside concrete. Test parameters include heating temperature and stirrup ratio. The test results showed that: (a) the bond failure load decreased gradually after high temperature with the increase of high temperature or the decrease of reinforced concrete stirrup ratio; (b) the bond failure load of push-out test was higher than that of push-back test after the same temperature; (c) the relative slip value between the steel tube and outside concrete decreased with the increase of the temperature; (d) the relative slip value had an increasing trend with the increase of stirrups ratio, but the influence was small.
{"title":"Residual Bond Strength between Steel Tube and outside Concrete after Heating","authors":"Kai Xiang, Yanchong Pan","doi":"10.1109/ICFSFPE48751.2019.9055836","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055836","url":null,"abstract":"The bond strength between steel tube and concrete is the foundation to ensure the good mechanical properties of concrete-encased concrete-filled steel tubular (CFST) columns. At present, there is little research on the residual bond strength between steel tube and outside concrete after high temperature cooling. The effect of heating and cooling on the residual bond strength between the steel tube and outside concrete is investigated in this paper. A total of ten specimens, including one unheated specimen and nine heating and cooling specimens, were tested to investigate the residual bond strength of steel tube and outside concrete. Test parameters include heating temperature and stirrup ratio. The test results showed that: (a) the bond failure load decreased gradually after high temperature with the increase of high temperature or the decrease of reinforced concrete stirrup ratio; (b) the bond failure load of push-out test was higher than that of push-back test after the same temperature; (c) the relative slip value between the steel tube and outside concrete decreased with the increase of the temperature; (d) the relative slip value had an increasing trend with the increase of stirrups ratio, but the influence was small.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"146 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88646263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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