共查询到19条相似文献,搜索用时 175 毫秒
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防火门是较为常见的建筑消防设施,通常用于防火墙的开口、楼梯间出入口、疏散走道、管道井开口等部位,对防火分隔、减少火灾损失起到重要作用。防火门按材质可分为木质防火门和钢质防火门。木质防火门是指用木材或木材制品制作门框、门扇骨架、门扇面板,耐火极限达到相关规范要求、技术指标符合GB14101-93《木质防火门通用技术条件》规定的门。钢质防火门是指用冷轧薄钢板作门框、门扇面板、骨架,在门扇内部填充不燃材料,并配以五金件所组成的能满足耐火完整性和隔热性要求,技术指标符合GB12955-91《钢质防火门通… 相似文献
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针对当前防火门耐火性能不稳定的实际情况,设计了水冷特级防火门,有效地提高防火门产品的耐火完整性和耐火隔热性两项关键质量指标,文章阐述了其工作原理、设计过程。 相似文献
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本文从“耐火极限”的定义出发 ,阐述了在防火墙上应设置防火门 ,不但要对防火门的耐火极限提出一定的要求 ,更要对其耐火完整性提出进一步的要求。 相似文献
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根据GB/T24480-2009.以一个电梯耐火门设计实例,介绍了电梯耐火门的完整性、隔热性的理论计算以及加强筋的设计。对设计的耐火门进行了耐火试验,通过上部、中部、下部门板的热成像图分析了平均温升,并测量了气体泄漏量。 相似文献
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An adjustable steel frame of a steel door, built in a massive brick wall, was subjected to fire according to the international standard ISO 834. Additional thermocouples, with respect to the ones required by the standard, were positioned at different sites of the steel frame cross-section to validate the numerical analysis carried out to study its thermal insulation performance. The leaf/frame interaction was monitored during the fire test to verify the integrity criterion, but was neglected in the calculations by assuming adiabatic conditions at the door clearance. Based on these findings, a parametric study was conducted to investigate the influence of boundary conditions, empty or filled frame cavities, and adjustable versus wrap-around frame on the temperature distribution of the steel frame. Combining the results of fire test and numerical simulation, the possibility to mutually assert the thermal performance, i.e. the insulation criterion for the cases of opening into and opening away from furnace, is discussed. 相似文献
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The numerical simulation of the temperature distribution of a steel door frame subjected to fire has been verified by means of fire resistance tests. For this purpose, a butted steel frame/steel door assembly, built in a massive brick wall, was subjected for at least 30 min to the standard fire of ISO 834 for both opening into as well as opening away from the furnace. The temperature measured on the room side of the frame was compared with the results obtained from numerical heat transfer analysis. The leaf/frame interaction was monitored during both fire tests to verify the fulfilment of the integrity criterion, but was neglected in the calculations by assuming adiabatic conditions at the door clearance. The possibility of mutual assertion of the insulation criterion (thermal performance) for the cases of opening into and opening away from the furnace has been discussed. Additionally, the influences of a thermally insulated frame and of a wall/frame anchorage were quantified by calculations, and comparisons with adjustable steel frames were made. 相似文献
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活性粉末混凝土(RPC)是超高性能建筑材料,与高强预应力筋结合形成的预应力RPC梁具有显著的承载、变形和耐久性能优势,但预应力RPC梁的火灾安全性能是制约其广泛应用的关键问题之一。鉴于预应力RPC梁的火灾安全性亟待研究,以荷载水平、预应力筋保护层厚度、预应力筋类型、预应力度等为试验参数,设计制作了8个预应力RPC简支梁,开展了恒定荷载ISO 834标准升温条件下受火试验。获得了梁内温度变化、挠度 受火时间曲线、有效预应力、裂缝开展、爆裂分布及深度等试验数据,研究了火灾高温损伤演化规律和破坏模式。结果表明:干热养护可有效抑制RPC高温爆裂,受火试件保持了良好的完整性;荷载水平和预应力筋保护层厚度是影响预应力RPC梁抗火性能的关键因素,随荷载水平的减小和预应力筋保护层厚度的增大,耐火极限显著提高;荷载水平为0.5、预应力筋保护层厚度不小于45mm可满足2.0h的耐火极限要求;同等条件下有黏结预应力RPC梁的抗火性能优于无黏结预应力RPC梁;常温下按适筋梁设计的预应力RPC梁火灾下易发生少筋破坏。 相似文献
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开发了一种全尺寸防火门防烟性能测试装置,并建立了一套测试程序,来研究不同压力差和温度下防火门的烟气泄漏速率。选取目前市面上典型结构的单扇与双扇钢质防火门,测试其防烟性能,发现典型钢质防火门在不同温度及压差下均有较大泄漏率,其防烟性能较差,无法有效阻挡火灾烟气。选取同尺寸防火门,对其加装三角形空心防烟密封条并进行防烟性能测试,结果表明,防烟密封条能有效减小门扇与门框间隙,从而减小防火门烟气泄漏率,提升其防烟性能;门扇数量对不同试验温度下防烟密封条的密封效果有一定影响,单扇门在加装三角形空心防烟密封条后防烟性能提升更多,且单扇防火门加装密封条后中等温度下的防烟性能提升幅度更大,而双扇防火门加装密封条后环境温度下的防烟性能提升幅度更大。 相似文献