Building Fire Protection Research Articles

Experimental study on the transitional behavior of the room fire under sub-atmospheric pressures

Fuel diffusion combustion and flame behavior within a confined space is a fundamental scientific problem in the energy and combustion field, it involves complicated chemical reaction, fire behavior, thermal dynamics, heat transfer, room-opening flowing and sub-processes of over-ventilated and under-ventilated room fire. However, previous classical knowledges and models about it are usually at standard atmospheric pressure (100 kPa), no work considers the fire evolution and flame behavior within the room for various sub-atmospheric pressures. In this paper, the experiment is carried by utilizing a 0.3 m × 0.3 m × 0.3 m reduced-scale cubic room with an opening of various dimensions, and using propane as fuel to simulate fuel combustion inside, which was placed at the Low Pressure Chamber creating various atmospheric pressures. The flame behavior and temperature evolution within the room was recorded and measured with 693 experimental conditions. The experimental results show that, (1) the air inflowing rate through opening into room and heat release rate within the room increase with atmospheric pressure; (2) the flame extinction or reaching well-mixed condition are more easily occurred for lower atmospheric pressure and opening dimension. These characteristic parameters and fire behaviors could be well described by new corrected opening ventilation factor involving effect of atmospheric pressure and the opening dimension. The research work fills the gap in basic scientific research of building fire at sub-atmospheric pressures, which also has important practical applicability of urban building fire protection design code (such as the materials in wall) in different altitudes, room fire suppression, and protecting urban safety.

Evaluation of Fire Protection System in Library Building Universitas Negeri Padang

The fire of a building will have a major impact on the building owner, both in the form of material, moral and environmental losses. In residential areas, offices and other public facilities often cause casualties. Therefore, a building needs to take into account the risk of fire so that building users can carry out activities safely and comfortably. One of the causes of fires is the fire suppression system that has not received full attention, where there is often an inadequate building fire protection system. The UNP Library Building is one of the public facilities buildings that are always crowded with students. It is necessary to evaluate the availability of the fire protection system to ensure the safety and comfort of its users. This research is in the form of an evaluation of the availability and completeness of the available fire protection systems and their remedies against the threat of fire. The data was taken through direct observation and question and answer and the distribution of questionnaires with the library. From the results of the analysis of the fire protection system inspection of the UNP Library building, it is known that on the 1st floor the lowest rediness value is 18.9%, for the 2nd and 3rd floors is 44.1%, the 4th and 5th floors are 45.9% and 45.6 % fulfilled the requirements based on the Minister of Public Works Regulation No. 26/PRT/M/2008.

Research on Key Problems and Optimization Based on Structural Design of Super High-rise Buildings

At present, complex super high-rise buildings and super high-rise buildings are emerging all over China, but there are still many problems to be solved in the design of super high-rise structures. For example, the wind pressure and earthquake risk of high-rise buildings, fire safety issues and personnel evacuation issues, earthquake will produce greater inertia force and bending force in high-rise buildings, wind load and wind pressure effect will be more significant, these are the parts that need to be carefully considered to ensure the safety and stability of the building structure. Therefore, it is necessary to analyze and optimize the problem of high-rise buildings. Taking a super high-rise building in Luohu District of Shenzhen City as an example, this paper analyzes the basic structure of super high-rise building, analyzes the key problems of structural design, and discusses the optimization method. This paper puts forward the optimization design method of building structure for seismic problem of super high-rise building structure, puts forward the solution to wind resistance problem, and puts forward the optimization layout method of building fire protection.

Efektivitas Program Kota Tanpa Kumuh (Kotaku) Dalam Menangani Permukiman Kumuh Di Kota Padang

West Sumatera Province is one of the 15 provinces with the highest slum area in Indonesia. The city of Padang, as the largest city and the provincial capital, has a number of slum areas with an area of 122.33 ha. Of the 22 Kelurahan in Padang, one of the widest slum areas is in the Kelurahan Binuang Kampung Dalam. The KOTAKU program is then present to direct and synergize all forms of collaboration between parties to prevent and improve the quality of slum settlements, especially the community as active development subjects. Within two years, the KOTAKU program initiated CFW (Cash For Work) and Sanitation Assistance activities with a total budget of nearly one billion by involving the full participation of the people there. This thesis aims to analyze how effective and the inhibiting factors of the KOTAKU Program are in dealing with slum settlements in Binuang Kampung Dalam Village. This study used a descriptive qualitative approach, and the method of selecting informants used a purposive sampling technique with the method of measuring program effectiveness using the Pentagonal Assets 7 Indicators. The results showed that the implementation of the KOTAKU program in Binuang Kampung Dalam Kelurahan focused on road repairs with a volume of 2,352.4 meters, drainage improvements with a volume of 275.7 meters, community capacity building 1 package, and sanitation improvement assistance to 100 families. However, the KOTAKU program is still considered less effective, because it does not bring changes to the other three indicators. The factors inhibiting the effectiveness of the program are the absence of programs on the indicators of building order, waste management and fire protection and the slow disbursement of funds

Prospects for the development of modern fire trucks

The issues of fire protection of residential buildings, national economy facilities and forests are of great importance in the system of national measures. Fire extinguishing and rescue operations for people in danger are the most important tasks that can be solved with the help of fire fighting equipment. The development and creation of special fire trucks equipped with power plants, the latest means of extinguishing fires and rescuing people in distress are urgent tasks of the present time. The article discusses the design of a fire truck equipped with all of the above systems. Keywords fire truck, project, combined power plant, fire extinguishing means

Influence of the facade slope on fire propagation processes on higher floors

The study considers the issue of the influence of the structural parameters of the facade on the processes of fire propagation through the external enclosing structures of buildings. The object of the study is the process of temperature changes on the surface of the inclined external enclosing structures of the building due to the action of fire. The study of the influence of the angles of inclination of the facade on the processes of fire propagation and the nature of temperature distributions on the surface of the facade was carried out. During the research, the methodology of experimental tests was used to limit the spread of fire along the facades using an installation that allows you to reproduce the angles of inclination. As the studied fragment of the facade, an external enclosing structure made of non-combustible materials without external cladding was used. Thermocouples were placed on the surface of the facade, which made it possible to obtain temperature data near its surface in real mode throughout the duration of the research. A class 34B model fire source provided a fire load of at least 2,200 MJ/m2 and an average temperature of 800–850 °С throughout the duration of the research. It was found that in the presence of a slope of the facade at an angle of +20°, an increase in temperature near the surface of the studied area by 24–26 % was observed. In the presence of an inclination of the facade at an angle of –20°, a decrease in temperature near the surface of the studied area by up to 55 % was observed. The obtained dependences will make it possible to review the approaches to the existing field methods of fire hazard assessment of facade systems. The practical result of the implementation of the obtained data may be the introduction of changes to building regulations to increase the level of fire protection of facade systems and buildings in general

Construction of transparent PAM/PVA interpenetrating network hydrogel for designing fireproof glass with superior heat insulation and aging resistance

The decorative and fireproof performance degradation of the grouting fireproof glass exposed to UV irradiation limits its application in the fire protection of buildings. To solve this issue, a transparent polyacrylamide/polyvinyl alcohol (PAM/PVA) interpenetrating network hydrogel was designed to prepare grouting fireproof glass with enhanced theheat insulation and anti-aging properties. The results show that the light transmittance of PAM/PVA interpenetrating network hydrogel decreases with the increased content of PVA, and a proper content of PVA in the PAM/PVA interpenetrating network is beneficial to maintain high optical transparency in the resulting hydrogel. Heat insulation test shows that the PAM/PVA interpenetrating network improves the water-locking ability of the resulting hydrogels, and the fireproof glass containing 3 wt% PVA shows the lowest backside temperature of 92.6 °C at 3600 s, which is 51.9% lower than that of fireproof glass with PAM only. Thermogravimetric (TG) and differential scanning calorimetry (DSC) analysis show that the PAM/PVA interpenetrating network hydrogel improves the thermal stability and charring ability of hydrogel, and the hydrogel containing 3 wt% PVA exhibits the best charring effect among the samples, showing the highest residual yield of 39.2 % at 800 °C. The analyses of decomposition products and char residues show that the PAM/PVA interpenetrating network hydrogel can extend the heat absorption process of water evaporation and improve the gas flame retardant efficiency. Accelerated aging test shows that the presence of PVA greatly slows down the blistering and yellowing phenomenon of fireproof glass, thus endowing the fireproof glass with the super durability of fire resistance. Especially, the backside temperature at 3600 s and light transmittance of the sample containing 2 wt% PVA after 168 h aging test only changed 19.2 °C and 1.9 %, respectively, compared to the those of unaged sample.

FDS-Based Study of the Fire Performance of Huizhou Fire Seal Walls in Traditional Residential Buildings in Southern China

In the history of human civilization, traditional villages and buildings have been significantly threatened by fire. As an essential part of Huizhou traditional architecture, fire seal walls play a crucial role in preserving Huizhou architecture by effectively blocking the spread of fire. However, with economic and social development, the Huizhou fire seal wall’s original fire prevention function has been unable to meet the needs of modern fire protection. This study aims to explore the fire performance of different types of Huizhou fire seal walls to provide a reference guide for future fire protection, optimization, and transformation of traditional buildings. In this paper, 3D models of traditional buildings with fire seal walls were built with FDS, and the performance of the different kinds of fire seal walls was simulated under the influence of wind speeds, building spacing, and the height of the vertical ridge of the fire seal wall. The results showed that, under the same conditions, a fire seal wall with a single eave is superior to fire seal walls with quintuple eaves in terms of performance, and fire seal walls with quintuple eaves are superior to fire seal walls with triple eaves in the middle and late stages of a fire. In addition, wind speeds, building spacing, and the height of the vertical ridge have different effects on the fire performance of seal walls. Lower wind speeds can reduce the fire performance of fire seal walls, and no wind and higher wind speeds have no significant effect on the fire performance of fire seal walls, while increasing the height of the vertical ridge and fire spacings appropriately can improve the fire performance of fire seal walls. This study provides a reference guide for future fire protection, optimization, and transformation of Huizhou fire seal walls, which can help improve the fire safety of traditional buildings.

Preparation and Performance of Building Fire Protection and Insulation Materials

In this paper, a series of calcium silicate thermal insulation materials were prepared by hydrothermal method, and their structure, mechanical properties and thermal insulation properties were systematically studied by adjusting their preparation process, aiming to develop a new type of calcium silicate thermal insulation material with excellent performance. We found that the product gradually changed from a dense flocculent substance on the surface to a loose needle rod substance, and the grain grew, and the crystallinity increased with the increase of synthesis temperature. As the initial calcium silicon ratio increases, the surface pores of the product increase, and the surface gradually becomes loose from dense, resulting in the appearance of tobermorite and xonotlite phases.

Facile strategy of preparing excellently thermal-insulating and fire-safe building materials based on an aromatic Schiff base dicarboxylic acid without additional flame retardants

Developing excellently fire-safe and thermal-insulating building materials is a critical subject in the building sector. In this work, a novel aromatic Schiff base dicarboxylic acid (FN) was synthesized through a facile strategy to prepare high-performance rigid polyurethane foam (RPUF) composites with excellent thermal insulation and fire safety performance. The uniform dispersion of FN in polyether polyol improved the cellular structure of RPUF composites, which was conducive to increasing the thermal insulation of RPUF composites. Therefore, incorporating only 10 wt% FN into RPUF composite (RPUF/10FN) possessed the lowest wall temperature (51.9 °C) and room temperature (38.8 °C) with the lowest temperature growth rate under the continuous thermal radiation of the heat source among all samples in the small chamber test. Moreover, FN remarkably reduced the peak heat release rate, peak smoke production rate, and peak CO production rate of RPUF/10FN by 41.9%, 58.0%, and 59.6% without additional flame retardants, respectively, compared with those of pure RPUF. In addition, FN endowed RPUF/FN composites with better fire resistance and structural integrity compared with pure RPUF in the building facade fire test and fire protection test. The increased fire safety of RPUF/FN composites is due to the barrier effect of the formation of a dense and continuous char layer and the dilution effect of nonflammable gas generated by the thermal degradation of FN. Furthermore, FN enhanced the water contact angle of RPUF/FN composites from 112.2° for pure RPUF to 120.8° for RPUF/10FN, indicating that FN also enhanced the hydrophobicity of RPUF/FN composites. Therefore, the as-designed RPUF composites containing FN possessed a broad application prospect in the building field.

IOT based Fire Detection System with Automatic and Manual Extinguishing System

A Novel fire extinguishing monitoring and control system is proposed in this paper. The system combines online monitoring of fire extinguishing information based on internet of things (IOT), early fire warning and alarm system with building safety evaluation, which are designed to acquiring the real-time information of fire extinguishing working condition, improving the reliable prediction mechanism in traditional fire monitoring system. A perception terminal based on IOT is developed and the fire real-time monitoring and control system is designed in this paper. The novel system can acquire the real-time working condition information of fire extinguishing facilities, such as pipe flow, pressure, temperature and humidity of the environment, current and voltage of the electric equipment, valve switch, relay action, alarming message, it can upload the collected data to the monitoring center through the (Client /Server) architecture. Based on these data, an electrical early fire warning model based on neural network is proposed. A fire safety evaluation model based on ontology with the usage of protege is established, which facilitate the on-line monitoring and control of building fire protection information, the prediction of electrical fire and improve building safety level evaluation.

Design of Safety Tracking Device for Worker's Safety And Monitoring

Safety Tracking is the process of tracing a person’s ware bouts and their vitals and health in case of an emergency or accident. A device which sends or saves this data is considered as a safety tracking device. This device may help multiple sensors attached to the device itself or attached to the person there by reading and sending their ware boats and data within the parameter of the workspace in a company to a live supervisor or data storage so that it can be reviewed in case an accident occurs. This data can be used to study any accidents involving that person and device preventive measures of that accident again. The novel system can acquire the real-time working condition information of faculties such as pipe flow, pressure, temperature, humidity of the environment, current & voltage of the electrical equipment, valve switch, relay action, alarming message it can upload the collected data to the monitoring center to the client/server architecture. Based on these data, an electrical early warning model depending on the change in surroundings based on neural work is proposed. A personal safety evaluation model based on ontology with the usage of protege is established, which facilitate the on-line monitoring and control of building fire protection information, the prediction of accidents and improve building safety level evaluation.

A Comparative Study of Building Regulations and Fire Protection Methods on Thatched Rooves in the United Kingdom, Denmark, the Netherlands and Japan

A Comparative Study of Building Regulations and Fire Protection Methods on Thatched Rooves in the United Kingdom, Denmark, the Netherlands and Japan

A Prediction Model for Smoke Spread Path in High Rise Building Fires Based on Graph Theory

To satisfy the demand for rapid prediction of smoke transmission paths in high-rise building fires, a graph-based model was developed. The model represents a high-rise building as a Directed Acyclic Graph (DAG) grid model and employs computer simulation to determine the smoke transmission path and generate prediction results. The results were compared with those from similar simulations and were found to be consistent, indicating the feasibility and objective nature of the prediction results. Compared to other methods, this model has a shorter modeling time and can quickly provide prediction results. Furthermore, it can be applied to buildings of any structure, thus serving as a reference for smoke control design in high-rise building fire protection systems, particularly in cases involving complex internal structures.

Flame extension lengths beneath a double slope roof induced by gaseous fuel jet flame

Due to the characteristics of good drainage and stable structure characteristics, the double slope roof is widely used in civil houses, industrial plants, and ancient buildings. However, double slope roof fire accidents occurred frequently. Studying the flame characteristics under the ceiling can provide scientific guidance for building fire protection. The present study investigated the flame extension lengths beneath a double slope roof induced by gaseous fuel jet flame, which had not been quantified in the literature. Results show that the length of flame extension was longer in the ridge direction compared to the slope direction, with a maximum difference of approximately two times. Moreover, their deviation increases with larger HRR and smaller θ, resulting from the fact that the structure of the double slope roof would restrict air entrainment and induce more unburned gaseous fuel to spread along the ridge. Comparing the experimental data with previous models proves that they cannot predict the ceiling flame extension length under the influence of roof angle. A new correlation incorporating the effect of θ was established based on the proposed flame volume assumption to estimate the equivalent HRR at the ceiling, whose accuracy and reliability were further validated by reference data. The model prediction agreed well with the literature data, with a maximum error of around 20%.

Indoor Fire Simulation in Low-Rise Teaching Buildings Based on BIM–FDS

School buildings gather a large number of underage students, and the disastrous consequences of fire in such buildings are very serious, which is one of the key concerns of society in fire prevention and control. This study takes a “[” type kindergarten teaching building as the background and constructs a BIM–FDS building fire simulation model to reveal the fire smoke dispersion law under the coupling of the typical building structure and fire protection systems. The results show that the stairwells on both sides of the “[” type building are the main channels for the diffusion of fire smoke, and the asymmetry of the stairwell structure will cause apparent differences in the diffusion of smoke. Using the natural smoke exhaust in the stairwells of low-rise buildings does not aggravate the spread of smoke in the building and is conducive to smoke emissions. The high-pressure water mist system is superior to the water spray system in fire extinguishing and controlling room temperature. While it reduces smoke exhaust performance, it does not adversely affect personnel evacuation. This study systematically reveals the law of diffusion of fire smoke from “[”-type teaching buildings, which can support the design of similar building structures, ventilation, fire protection, and the formulation of fire escape plans.

Cost–Benefit Analysis of Fire Protection in Buildings: Application of a Present Net Value Approach

Cost–Benefit Analysis of Fire Protection in Buildings: Application of a Present Net Value Approach

Systems as an effort to guarantee the safety and security of guests study of hotel building fire protection

<p>Hotel fires can occur at any time without knowing the season for which the hotel building must have a fire extinguishing system that can guarantee the safety of guests, the purpose of this study is to find out the equipment used in the hotel building fire extinguishing system, to assess the completeness of facilities and infrastructure of the hotel building fire protection system, know the precautions against hotel fires in an effort to guarantee the safety and security of guests in hotel. The research methods used in this study are library study methods, interview methods, observation methods, documentation methods. Assessment of the completeness and reliability of building fire protection systems against fire hazards is used the parameters of tread completeness, means of rectification, active and passive protection systems. In data collection, it was carried out on the object of the study, namely at the Sahid Jaya Solo Hotel. The results of the discussion in this study, the equipment in the research object is complete and functions well and the results of the assessment of the reliability of the fire protection system obtained results of 90.63 which means that the reliability of the building is very good. From these results, it can be used as a consideration for the hotel in improving the right fire extinguishing system in an effort to guarantee the safety and security of guests.</p>

Optimization of Key Hinge Points Position of Folding Arm Ascending Platform Fire Truck

In modern society, high-rise buildings are everywhere, and urban fire protection is also facing many challenges. The primary problem is the fire protection and rescue of high-rise buildings. Therefore, there is always a demand for large ascending platform fire trucks in China. Collapsible boom structure is a common structure of fire truck with ascending platform. The performance of collapsible boom luffing process largely depends on the layout of each hinge point of luffing mechanism. In this paper, the hinge point position of the key structure of the folding arm type 72m ascending platform fire truck is optimized, and the original structure layout is improved, so that the variable amplitude hydraulic cylinder has less force, and the safety performance of the folding arm is improved. In this paper, the kinematic and dynamic models of boom amplitude are established, and two optimization methods, genetic algorithm and SQP algorithm, are adopted to optimize, and the two optimization results have a certain degree of improvement in performance compared with the original layout.

Intelligent control of building fire protection system using digital twins and semantic web technologies

A fire protection system takes on a critical significance to building operation. This paper describes the use of digital twins (DTs) and semantic web technologies for the intelligent control of building fire protection (BFP) systems in fire accidents. Specifically, a data fusion stage and several information-based control mechanisms are involved in the use of the two technologies. A designed BFP ontology is considered as the semantic model and basis of data fusion between the static building geometric information and the dynamic sensing data. The above information is incorporated into a DT data model, which is considered as the mapping of physical space. Moreover, rule models and process models are developed to achieve intelligent control mechanisms and keep the DT data model synced with the physical space. A case study based on a fire accident simulation was conducted to verify the feasibility of the use of DTs and semantic web technologies.