Response Behavior of High Temperature and Fully Constrained Steel Beam Rapidly Cooled by Spray Water in Fire

夏云春

doi:10.13409/j.cnki.jdpme.2017.01.023

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Response Behavior of High Temperature and Fully Constrained Steel Beam Rapidly Cooled by Spray Water in Fire

更新时间：2025-12-11

- Response Behavior of High Temperature and Fully Constrained Steel Beam Rapidly Cooled by Spray Water in Fire
- Vol. 37, Issue 1, Pages: 162-168(2017)
- 作者机构：
- 作者简介：
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- DOI：10.13409/j.cnki.jdpme.2017.01.023
  CLC： U391
- Published：2017
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[1]夏云春.局部喷水急速冷却下完全约束火灾高温钢梁力学响应行为[J].防灾减灾工程学报,2017,37(01):162-168.

夏云春. Response Behavior of High Temperature and Fully Constrained Steel Beam Rapidly Cooled by Spray Water in Fire[J]. 2017, 37(1): 162-168.
[1]夏云春.局部喷水急速冷却下完全约束火灾高温钢梁力学响应行为[J].防灾减灾工程学报,2017,37(01):162-168. DOI： 10.13409/j.cnki.jdpme.2017.01.023.

夏云春. Response Behavior of High Temperature and Fully Constrained Steel Beam Rapidly Cooled by Spray Water in Fire[J]. 2017, 37(1): 162-168. DOI： 10.13409/j.cnki.jdpme.2017.01.023.

摘要

讨论了不同位置喷淋水快速冷却下受限钢梁的力学变化特性

通过相关实验可知:冷却或灭火喷淋水对高温钢结构会产生很大的冲击效应。温度高于6℃与低于5℃的喷淋水对受限高温钢梁产生的受力和变形影响存在明显差异

5℃以下的喷淋水产生的受力和变形特性的最大值要远大于6℃以上喷淋水的作用程度

且要比升温过程产生的受力高1倍以上。冷却位置对结构的受力和变形特性也有影响。一般在右侧梁柱节点处喷水时最大

而在跨中喷水冷却时次之

在梁右侧1/8跨处喷水冷却时最小。受约束钢梁在喷水快速降温过程中

水温变化对结构受力和变形特性的影响程度较大

而水量变化对结构受力和变形特性的影响程度不大。在喷水降温阶段

开始阶段受力和变形特性有所回弹

但仍较大

随着进一步喷水冷却

结构的受力和变形不但不减小

反而增加。

Abstract

This paper discusses the mechanical response of high temperature strained beam at different positions when it is rapidly cooled by spray water.According to the experimental results

we can know that:the cooling or fire prevention water has a great impact on high temperature beam.The impact effect is much obviously different between spray water above 6 ℃ and spray water below 5℃

the maximum force and deformation produced by the cooling of spray water below 5℃is much greater than those produced by the cooling of spray water above 6℃

and the force produced during cooling was greater more than 1time that during heating up.Cooling site also has a great effect on the force and deformation for the strained beam

in normally

they are the maximum when cooled at joints of beam-to-column

and they are the second when cooled at the middle span

they are the minimum at 1/8of the span of right beam when cooled by spray water.During the rapid cooling by spray water

water temperature has a greater impact on the force and deformation characteristics of beam than those produced by the change of water flow

and the change of water flow just has a little effect on the forces and deformation of beam.In the early of cooling

the force and deformation rebounds

but they are still great

with further cooled by water

the force and deformation characteristics does not decrease

but they both increase.

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references

喷水急冷作用下火灾高温钢框架损伤过程的简化分析方法 [J]. 夏云春,徐正朝. 建筑结构 . 2016(S2)

The mechanics and deformation of high temperature steel frame rapidly cooled by spray water in fire fighting [J]. Yunchun Xia. Theoretical & Applied Mechanics Letters . 2016(04)

喷水急速冷却下火灾高温钢框架破坏行为研究 [J]. 夏云春. 建筑结构 . 2016(S1)

受火约束钢梁在升温段和降温段行为的理论分析（Ⅱ） [J]. 郭士雄,李国强. 防灾减灾工程学报 . 2006(04)

受火约束钢梁在升温段和降温段行为的理论分析（Ⅰ） [J]. 李国强,郭士雄. 防灾减灾工程学报 . 2006(03)

基于“安全性等价”概念的水喷淋作用下防火钢构件失效概率研究 [D]. 徐晓玲. 中国科学技术大学 2009

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