悬索桥加劲梁受火灾后承载能力检测及评估计算研究
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摘要
钢筋混凝土在受到火灾作用时,由于钢筋和混凝土物理和化学性质随温度的升高发生了一系列复杂变化导致材料的力学性能随之产生较大变化。火灾对于整个结构,将引起结构的变形增大和承载力降低,严重时可能导致结构失效发生倒塌。为了准确了解悬索桥加劲梁受火灾后的承载能力及使用性能,检验该桥加劲梁在火烧后是否还处于正常工作状态,特制定完善的检测评估方案;本文以霍林郭勒市混凝土自锚式悬索桥为例,介绍了悬索桥加劲梁受火灾后承载力检测及评估计算方案,本方案研究对其他同类型桥梁在受到类似灾害后的检测评估计算、桥梁加固维修及管理提供技术依据,具有较高的指导意义。
When reinforced concrete under fire effect,because of the physical and chemical properties of steel and concrete,with the increase of temperature had a series of complex changes in the mechanical properties of the materials produced bigger change. The fire for the entire structure,will cause the deformation of the structure increase and reduction of bearing capacity,serious when may lead to failure of structure collapse. In order to accurately understand the stiffening girder bearing capacity and performance of the suspension after a fire,examine whether the stiffening girder bridge is still in working condition after the fire,developing a perfect detection and evaluation program; In this paper,taking the fourth concrete self-anchored suspension of Huolinguole as an example,described the detection and assessment program about stiffening girder capacity of the suspension bridge after the fire. The program of the same type of bridge to other similar disasters in the affected post-test evaluation,bridge repair,reinforcement and management to provide technical basis,with high significance.
When reinforced concrete under fire effect,because of the physical and chemical properties of steel and concrete,with the increase of temperature had a series of complex changes in the mechanical properties of the materials produced bigger change. The fire for the entire structure,will cause the deformation of the structure increase and reduction of bearing capacity,serious when may lead to failure of structure collapse. In order to accurately understand the stiffening girder bearing capacity and performance of the suspension after a fire,examine whether the stiffening girder bridge is still in working condition after the fire,developing a perfect detection and evaluation program; In this paper,taking the fourth concrete self-anchored suspension of Huolinguole as an example,described the detection and assessment program about stiffening girder capacity of the suspension bridge after the fire. The program of the same type of bridge to other similar disasters in the affected post-test evaluation,bridge repair,reinforcement and management to provide technical basis,with high significance.
引文
[1]李世安.火灾过程预应力混凝土梁桥力学性能分析及灾后评价方法[D].西安:长安大学,2012.
[2]郑继光,王兴,刘忠固.意外火灾对预应力混凝土桥梁结构的损伤分析[J].北方交通,2012(12):54-57.
[3]TG/T J21—2011公路桥梁承载能力检测评定规程[S].
[4]严猛.大跨度系杆拱桥地震反应特性分析研究[D].成都:西南交通大学,2011.
[2]郑继光,王兴,刘忠固.意外火灾对预应力混凝土桥梁结构的损伤分析[J].北方交通,2012(12):54-57.
[3]TG/T J21—2011公路桥梁承载能力检测评定规程[S].
[4]严猛.大跨度系杆拱桥地震反应特性分析研究[D].成都:西南交通大学,2011.
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