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the fire resistance
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  抗火性能
     Based on the indexes of 7 physicochemical and 9 bio ecological characteristics of 16 tree species in the Qinling forest region, factors on the fire resistance were analyzed and their fire resistance were also appraised by the method of PCA and gradient value of fire resistane.
     以秦岭林区16种乔木树种的7项理化性质指标和9项生物学及生态学特性指标为依据,分析了影响树种抗火性的因素,并利用主分量分析法结合植物抗火性梯度值(GV)对其抗火性能进行了综合评判。
短句来源
     In view of the fact that creep,stress relaxation and thermal expansion are key factors on the fire resistance characteristics of prestressed structures,prestressing steel wires(standard tensile strength fptk=1770N/mm2,low relaxation of prestress)are selected to study these factors.
     鉴于高温下预应力钢丝蠕变、应力松弛及温度膨胀性能是影响预应力结构抗火性能的重要因素,以1770级低松弛预应力钢丝为对象开展了研究工作。
短句来源
     The Research of the Fire Resistance of Steel Frames after Subjecting to Impact Loads
     冲击荷载作用后钢框架结构抗火性能研究
短句来源
     Based on the ISO time-temperature curve,reinforcement cover,reinforcement and concrete strength grade,load level and thickness of slabs are discussed for the fire resistance.
     并以标准升温为条件,探讨了不同的钢筋保护层厚度、钢筋及混凝土强度等级、荷载水平、板厚等因素,对钢筋混凝土简支板抗火性能的影响.
短句来源
     The fire resistance of prestressed concrete beams and slabs as well as prestressed concrete frame is investigated.
     探讨预应力混凝土梁和预应力混凝土板的抗火性能,并重点分析预应力混凝土框架在火灾作用下的受力特性;
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     Many scholars and fire-resistance engineers have realized that the fire resistance capacity of substructure in global structure is much different from that of single member.
     随着对钢结构整体抗火能力的深入理解,人们意识到单个构件的抗火能力与处于结构整体中的构件抗火能力具有很大不同。
短句来源
     The summarizing of calculating method on the fire resistance of steel structures
     浅谈钢结构抗火计算方法
短句来源
     The fire resistance endurance of the 11th tunnel fireproofing coating is 3.5h with 13mm thick according to ISO 834 standard, and 3h with 20mm thick according to C-H temperature-time curve.
     得出如下结论:按该配方11得出产品以ISO834标准检测时,涂料13mm厚能达3.5小时耐火极限; 按C-H火灾升温曲线检测时,涂料20mm厚能达3小时耐火极限,耐火性能非常优异;
短句来源
     Taking 10 items of physical and chemical properties of 37 tree species as basic data, two approaches for assessing the fire resistance, namely (automatic interaction detection)and gradient analysis were studied. A new idea of using the gradient value as the predictive value of A. I.
     以 37个针阔叶树种的 10项理化性质数据为研究资料 ,通过对评价树种抗火性的A I D 方法和梯度分析法的比较研究 ,揭示了这两种方法的优点及不足之处 ,据此 ,提出运用梯度值来作为A I D 方法预测值的新思路 ,并用此综合方法从理化性质角度对 37个树种的抗火性进行了综合评价。
短句来源
     The duration of the fire resistance reaches 3.5 h when the thickness of the coating is 13 mm(tested by the fire curve of ISO 834), duration of fire resistance reaches 3.0 h when the thickness of the coating is 13 mm (tested by the fire curve of H-C).
     按ISO834曲线升温,涂层厚度13mm时,耐火极限达到3.5h; 按碳氢曲线升温,涂层厚度20mm时,耐火极限达到3.0h。
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  the fire resistance
The fire resistance with respect to temperature response and spalling have been experimentally determined for several different concrete qualities.
      
Results from the studies show that the insulation type and number of gypsum board layers have significant influence on the fire resistance of steel stud wall assemblies.
      
A detailed experimental study was conducted to evaluate the fire resistance of 14 full-scale steel stud wall assemblies.
      
This paper presents the effect of various factors on the fire resistance of load-bearing, gypsum board protected, steel stud wall assemblies.
      
Two calculations illustrate how the EC can be applied to evaluate the fire resistance of the structure.
      
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In this paper mechanical properties and fire resistance of various materials used as the princi- pal part of construction in the buildings under the fire loads concisely are narrated and anal- ysed.Finaly,the measures to improve the fire resistance for the principal part of building construction are advanced

本文简要概述了作为建筑物主体结构的各种材料在火灾荷截作用下的力学性能与耐火性,并分析了产生耐火性差的原因,提出了改进主体结构耐火性的办法。

The purpose of this study is to evaluate the thermal performances of RY- I type transport cask for spent fuels. The performances are the heat transfer performance in normal transport condition and the fire resistance in fire accident. A mathematical and physical model has been built and two computer programs, RYTDOT-N and RYTDOT-F, have been completed for calculation. This was the first time in China to perform the thermal test for a transport cask. For testing the prototype cask, it was put into...

The purpose of this study is to evaluate the thermal performances of RY- I type transport cask for spent fuels. The performances are the heat transfer performance in normal transport condition and the fire resistance in fire accident. A mathematical and physical model has been built and two computer programs, RYTDOT-N and RYTDOT-F, have been completed for calculation. This was the first time in China to perform the thermal test for a transport cask. For testing the prototype cask, it was put into a furnace and the test lasted 30 minutes. During the test period the time-averaged environment temperature was greater than 820C. The test methods, conditions and instrumentation fully conformed to the requirement specified by IAEA "Regulations for the Safe Transport of Radioactive Material". Test results show that the fire resistivity of the cask has met the requirement. The dynamic temperature of the cask measured was in good agreement with the results calculated by computer program. It was also proving the correctness of computer program developed.

本试验研究的目的是评价RY-Ⅰ型乏燃料运输容器的热性能,它包括正常运输状态的传热性能及火灾事故时的耐火能力。确定了数学物理模型,并编制了RYTDOT-N、RYTDOT-F两个计算机程序。乏燃料运输容器热试验在中国是首次。试验是将原型容器放在加热炉内进行的。试验在超过按时间平均的环境温度820℃下持续30分钟,试验方法、试验条件和试验装置均满足IAEA的安全标准“放射性物质安全运输规程”的要求。试验结果证明了容器的耐火性能符合要求。试验的动态温度测量结果与程序计算结果吻合甚好,从而验证了程序的正确性。

This paper deals with the principle,superiority and applied technology of biological fire-prevention,with the emphasis on the theoretical and technical problems to improve the fire-resistance property of stands by buildiong the fire-preventing strips,planting the coniferous and broadlearf mixde forests and the like,pointing out that biological fire-prevention is a positive and practical way to prevent the forest fire and a developing direction in which to establish the modern...

This paper deals with the principle,superiority and applied technology of biological fire-prevention,with the emphasis on the theoretical and technical problems to improve the fire-resistance property of stands by buildiong the fire-preventing strips,planting the coniferous and broadlearf mixde forests and the like,pointing out that biological fire-prevention is a positive and practical way to prevent the forest fire and a developing direction in which to establish the modern forestry fire-preventing net-wokh in south China forests areas.

本文论述了生物防火的原理、优越性和技术应用理论.着重从防火林带网络建设,针阀混交林的培育途径,改造利用天然阔叶林,林地间种等提高林分抗火性等理论和应用技术问题进行探讨.指出生物防火功效显著,富有生命力,容易推广,是南方林区现代化森林防火体系建设的发展方向.

 
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