抗火的

The study on modeling and programming of the responses of reinforced concrete structures in fires relates many fields such as combustion, heat transfer, engineering mechanical, engineering mathematics, finite element method, software engineering, computer graphics etc. Thus, more analytical, experimental, and programming work is needed before STRUFIRE can be used as calculation and design tool by practicing engineers.

对钢筋混凝土结构在火灾中的反应进行数值模拟及软件开发，涉及到很多学科，包括燃烧学、传热学、工程力学、材料科学、工程数学、有限元技术、软件工程学、计算机图形学等，因此，要想把STRUFRE开发成面向工程实际的结构抗火分析及设计软件，还有大量艰苦工作要做。

ISO834 and parametric equation approach are lack of pertinence. The results may be too conservative. The temperature obtained by zone model is low, so that it is not suitable for the performance-based fire protection design on this structure. Field model considers the heterogeneity of environmental temperature, and its result is close to the real fire, so that it is commended to the performance-based fire protection design on steel staggered-truss structure.

国际标准升温曲线和参数化室内升温曲线不考虑火源功率、建筑通风口等因素，缺乏针对性，分析结果偏于保守；区域模型所得温度偏低，不宜用于交错桁架结构的性能化抗火设计；场模型考虑了火源功率及环境温度分布的不均匀性，和实际火灾较接近，计算结果相对较为准确，可用于结构的性能化防火设计。

When the temperature is increasing quickly,the steel work will be destroyed easily without the protection of fire-proofing,therefore, the designing aim of steel frame fire-resistance is:how to quantitatively confirm the protectional measure in fire resistance in order to let the time of the fire resistance in steel work be longer or at least equal wit.

因此 ，在钢结构抗火设计时必须考虑到：如何定量地确定防火保护措施，使得钢结构构件的耐火时间大于或等于规定的耐火极

The column stiffeners can obviously improve both the critical temperature value and the ultimate rotation of the joints.

最后，根据试验和有限元分析的结果，对节点的抗火设计和施工提出了建议。

Tapered beam of a steel portal frame is numerically simulated by the finite element method,and the changes of temperature field under the ISO time-temperature curve and local fire are obtained.

当前轻钢门式刚架的抗火设计，尚以沿全构件轴线方向按照ISO国际标准升温曲线作为依据，存在不经济和不合理的因素。

This paper mainly sums up the analytical methods for evaluating the fire resistance of steel frame structures in the later two stages.

钢结构抗火计算理论的发展分为3个阶段：单根构件分析、平面框架分析和钢框架结构整体分析。

The key problems on the performance-based fire-resistant design of steel structures are discussed.

并探讨了钢结构性能化抗火设计需解决的关键问题。

The test results show that the fire-resistant time of rigid joints is short,being about twenty minutes in ge...

最后，根据试验和有限元分析的结果，对节点的抗火设计和施工提出了建议。

If improving the steel fire-resistant ability or enhancing the ductility of the structure, the collapse can be avoided.

如果能够提高结构的抗火能力或者提高结构的延性，将有可能避免结构倒塌，避免惨剧再次发生。

This job can provides the theory foundation for the constructional flame-resistant designs, on the other hand, it can provide the necessary data and theory direction for the test and reinforcement of the buildings suffered fire.

这样做一方面可以为建筑物的抗火设计提供理论依据，另一方面可以为灾后建筑物检测、加固提供必要的数据和理论指导。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐