某框架结构火灾后的检测鉴定与加固处理

通过对某框架结构房屋火灾后的检测鉴定,检验了混凝土结构构件的火灾后检测鉴定方法的应用。根据对现场火灾发生情况的调查,对构件表观现象进行检查与分析,并结合构件使用情况及材料情况检测,对受火构件进行评级。以构件评级为依据作出鉴定结论,根据鉴定结论及相关规范,制定加固处理方案,可有效避免火灾后结构构件出现的安全性隐患。     

某客车厂喷漆车间火灾后结构安全性鉴定

受郑州宇通客车股份有限公司的委托,对该公司小件喷漆车间发生火灾后的结构主要承重构件（屋架、吊车梁、排架柱及大型预应力屋面板等）的安全性进行鉴定。通过对火灾后现场调查、火灾后现场结构检测、分析火灾对承重混凝土构件的影响及结构构件损伤程度,现提出如下鉴定处理意见：     

某厂房火灾后的结构安全性鉴定及其加固方案

针对某厂房火灾后的工程现场勘测及检测情况,论述现场勘测内容、方法及工程鉴定的依据,火灾温度推断及温度区域划分,火灾后结构构件鉴定评级,加固修复处理方案。     

某商厦火灾后结构安全性鉴定

某商厦由于遭受火灾,导致结构出现较大损失。为了消除安全隐患,需要对该商厦进行全面的安全性检测鉴定。通过现场勘察推定火灾的主要作用区域、火场区域温度,根据灾后结构损伤现状评定构件损伤状态等级。依据现场检测鉴定结果,分析验算结构或构件过火后剩余承载能力,为后续的加固处理方案提供依据。     

框架结构厂房火灾后的鉴定及加固处理方案

以某框架结构厂房火灾后结构检测鉴定及混凝土构件加固处理方案为例,依据《火灾后建筑结构鉴定标准》(CECS 252:2009)在火灾后建筑结构鉴定中的应用,并依据国家现行的相关设计规范,对受损构件加固的方法和思路进行了分析,为今后火灾后建筑结构的检测鉴定及处理决策提供了借鉴并积累了经验.     

某剧院火灾后结构损伤事故分析

本文主要对莱剧院火灾后结构损坏检测、鉴定,通过现场调查及检测,对结构构件损伤的程度进行综合分析,为加固维修处理提供依据。     

某高层建筑火灾后结构性能检测鉴定研究

火灾是高层建筑重要防范问题之一,火灾后鉴定对预防火灾以及修复火灾后建筑具有重要意义依托某工程实例,通过回弹法、钻芯法、实验室检测对火灾后结构构件混凝土及钢筋材料进行了力学性能检测研究,依据相关规范进行了影响区域鉴定、火灾后构件性能评估,并对火灾后结构构件的承载能力进行了计算分析,给出了相关力学性能及承载能力鉴定结果研究...     

火灾后框架结构的安全性鉴定及加固

火灾后的建筑结构的安全性鉴定及加固对保证建筑结构的安全性及后续使用年限具有重要意义。某3层框架结构商业楼首层作为汽车维修车间使用,由室外不明火源引起火灾。为了解受火灾作用后结构的损伤情况,保证结构的安全性,对过火区域的主要承重构件损伤情况进行现场调查并进行初步鉴定评级,对主要结构构件的混凝土强度及钢筋强度进行检测,依据实测结果对结构承载力进行验算并做出详细鉴定评级。经过计算分析,提出了采用增大截面加固的方法对受损结构进行加固,并验证了加固的效果能够满足结构的安全性要求。     

某框架结构厂房火灾后的鉴定及加固

依据《火灾后建筑结构鉴定标准》(CECS252:2009)在火灾后建筑结构鉴定中的应用,对某框架结构厂房进行火灾后结构检测鉴定,并依据鉴定结果及国家现行的相关设计规范,对受损混凝土构件加固的方法和思路进行了分析,为今后火灾后建筑结构的检测鉴定及处理决策提供依据。     

某地铁车库火灾后受损板检测鉴定与加固维修研究

以某地铁车库火灾后受损板为例,通过显微结构分析、结构物理力学性能检测、现场原位荷载试验等方法,对火灾后受损板进行了检测鉴定与加固维修研究。研究火灾后受损混凝土结构的检测鉴定内容与方法,为灾后结构的损伤评价及后续的维修与加固提供技术依据。提出了一种火灾后受损结构鉴定评级层次划分与评级标准,可补充火灾后混凝土结构损伤程度的评级问题。根据检测鉴定结果评定火灾受损结构构件的损伤等级,对不同程度受损的结构构件进行了加固与维修设计。通过加固与维修,消除了火灾后结构的安全隐患,提高了结构的承载力与耐久性。     

论建材集贸市场的消防安全现状及预防对策

结合建材集贸混合市场火灾隐患整治试点工作,就集贸市场的消防安全现状、火灾危险性和消防安全管理情况总结了几点认识,以全面推进该类市场火灾隐患综合整治,确保消防安全。     

建筑外保温材料的火灾危险性及防控对策

介绍建筑外保温材料的类型及工程应用情况,分析建筑外保温材料的火灾危险性,介绍国外一些国家建筑外保温材料及系统的有关防火要求,就进一步加强建筑外保温材料火灾防控提出了有关对策建议。     

A study of the effect of partial loss of protection on the fire resistance of steel columns

Missing fire protection material on steel structural members is generally recognized as a problem, though little information is available to quantify the effect. A finite element heat transfer analysis is used to compare the thermal response of steel columns with lost protection material when exposed to the ASTM E-119 furnace environment. Based on the predicted thermal response and using thermal endpoint criteria specified in ASTM E-119, estimates are made of the fire resistance of each column with varying amounts of missing protection. Relatively small proportional losses of fire protection material are required before significant reductions in fire resistance are realized. The degradation in fire resistance is most significant for light-weight columns and for cases where the fire protection material is missing from the flange rather than web.     

热塑性外保温材料火蔓延规律研究

根据火灾动力学理论，考虑材料厚度和火源位置对材料燃烧发展过程的影响，建立了热塑性外保温材料无量纲火蔓延速率模型，提出了表征向上火蔓延和向下熔融流淌燃烧相互促进作用大小的指标—耦合燃烧度（I）。通过以材料厚度和火源位置为变量进行实验，研究了热塑性外保温材料火蔓延速率随时间呈指数增长，验证了模型的准确性，获得了不同厚度、不同火源位置条件下的耦合燃烧度，得出了耦合燃烧度（I）与火蔓延增长速度呈正比。     

Bench-scale assessment of combustion toxicity—A critical analysis of current protocols

The toxicity of fire effluents is not a material property but a function of both the material and the fire environment. To be meaningful, it is essential that toxicity results should relate to the end-use fire situation. This paper reviews current fire effluent toxicity tests, their relevance to fire, and the ways of assessing and applying their results to reduce fire hazards. There are a large number of different methods for determination of the toxic potency of fire effluents from materials or products. These different methods yield apparently inconsistent data because they represent different fire scenarios; measure product yields either as a function of material flammability or independent of it; base the toxicity assessment on the concentrations of different species; or use animal exposure to generate an overall estimate of toxic potency without knowledge of the relative contributions of the chemical species.     

高层建筑外墙保温材料火灾案例分析

近年来,频繁发生外墙保温材料火灾事故,引起全社会的广泛关注。文中从火灾案例入手,全面分析了高层建筑外墙保温材料火灾特点及成因,从提高外墙保温材料燃烧性能等级、落实施工现场火灾防控措施、加强消防监督管理等方面提出了火灾防控对策。     

Practical need of scientific material models for structural fire design — General review

More and more countries are now permitting a classification of structural elements with respect to fire exposure to be formulated analytically as an alternative to the internationally prevalent method of classification, based on results of standard fire resistance tests. In some countries, the authorities also have taken the next step to approve a general practical application of a direct analytical design procedure, based on the natural compartment fire concept.The process of an analytical structural fire design comprises three main components — the determination of the fire exposure, the thermal analysis and the mechanical behaviour analysis. The components require access to well-defined input information on: (a) material properties for describing the characteristics of the fire load and the compartment fire; (b) material properties for determining the transient temperature state of the fire-exposed structure; and (c) material properties for determining the related mechanical behaviour and load-bearing capacity.With a summary presentation of the development and characteristics of the analytical structural fire design as a background, the paper is focusing on the mechanical material properties at elevated temperatures. A systematic scheme of classification of available tests is referred to and the importance is stressed of using such functionally well-defined tests which give material properties, stringently connected to material behaviour models being independent of the type of load-bearing structure.     

Experimental study on the fire resistance of steel columns protected with fire boards

The thickness of the fire protection material of steel columns should be determined to guarantee the load-bearing capacity of the steel columns during a fire. In Korean standards, the strength capacity of steel columns is evaluated by measuring the axial deflection or surface temperature of only one H-section of 300x300x10x15 or similar dimensions in a fire test. Once the thickness of a fire protection material is approved, it can be applied to any section, regardless of the size and shape. However, in order to properly protect a building from a severe fire, the appropriate thickness of the fire protection material should be determined with consideration of the section factor, size and shape of steel columns in accordance with building regulations. This paper describes a series of full-scale and small-scale fire tests which were conducted on H-section and Rectangular Hollow Section (RHS) steel columns protected with glass fiber reinforced gypsum (GRG) boards and cellulose fiber reinforced cement (CRC) boards. The main factors of the fire tests were the section factor, the section shape and the thickness of the fire protection materials. Simple equations to predict the thickness of a fire protection material of steel sections, accounting for the shape factor and the required fire resistance, are proposed. A comparative study on the efficiency between the newly developed columns with two types of fire boards and the conventional columns with a combination of spray and gypsum boards was also conducted, and results are reported herein.     

TDI生产过程中火灾危险性分析及对策

甲苯二异氰酸酯（TDI）是生产聚氨酯的主要原料，其生产工艺流程复杂，生产过程中的原料、辅料、成品具有一定的火灾危险性，通过对TDI生产装置各主要单元进行火灾危险性分析，得到适当的安全对策措施。     

建筑结构用耐火钢的耐火极限试验

采用鞍钢开发的抗拉强度490MPa级耐火钢,根据中冶集团建筑研究总院设定的试验方案。经国家固定灭火系统和耐火构件质量监督检验中心试验,鞍钢耐火钢在无涂覆状态下达到国家建筑4级梁的耐火极限;薄型涂覆达到3级梁的耐火极限;厚型涂覆达到了1级梁的耐火极限,并且实现耐火钢的厚型涂覆材料厚度比普通Q345钢节省1／2。