佳木斯大学学报(自然科学版)
佳木斯大學學報(自然科學版)
가목사대학학보(자연과학판)
JOURNAL OF JIAMUSI UNIVERSITY (NATURAL SCIENCE EDITION)
2015年
3期
341-344,348
,共5页
桥面车辆火灾%温度%拉索失效%位置区域
橋麵車輛火災%溫度%拉索失效%位置區域
교면차량화재%온도%랍색실효%위치구역
vehicle fire on bridge deck%temperature%cable failure%location area
桥面车辆火灾的场景多样,对斜拉索造成的影响差别很大。用不同的火灾位置区域代表不同的拉索失效状态和失效根数,可建立桥面车辆火灾对斜拉索影响的简化分析方法。在确定斜拉桥常见火灾类型和拉索失效准则的基础上,分析火灾位置对拉索温度的影响规律,根据有限元计算结果提出通用的拉索失效区域和不同失效根数的区域划分方法,两者结合形成火灾对拉索影响程度的区域,该区域划分结果可以直接指导火灾场景下拉索受影响程度的判断。
橋麵車輛火災的場景多樣,對斜拉索造成的影響差彆很大。用不同的火災位置區域代錶不同的拉索失效狀態和失效根數,可建立橋麵車輛火災對斜拉索影響的簡化分析方法。在確定斜拉橋常見火災類型和拉索失效準則的基礎上,分析火災位置對拉索溫度的影響規律,根據有限元計算結果提齣通用的拉索失效區域和不同失效根數的區域劃分方法,兩者結閤形成火災對拉索影響程度的區域,該區域劃分結果可以直接指導火災場景下拉索受影響程度的判斷。
교면차량화재적장경다양,대사랍색조성적영향차별흔대。용불동적화재위치구역대표불동적랍색실효상태화실효근수,가건립교면차량화재대사랍색영향적간화분석방법。재학정사랍교상견화재류형화랍색실효준칙적기출상,분석화재위치대랍색온도적영향규률,근거유한원계산결과제출통용적랍색실효구역화불동실효근수적구역화분방법,량자결합형성화재대랍색영향정도적구역,해구역화분결과가이직접지도화재장경하랍색수영향정도적판단。
The scenarios of vehicle fire on bridge deck vary with different locations of different vehicle kinds, and have different impact on stay cables.For these scenarios, it is feasible to divide different location ar-eas to represent different states and numbers of cable failure.By this way, a simplified method for analyzing the impact of vehicle fire on stay cable could be established.On the basis of confirmation of fire types and failure cri-terion, the regulation between cable temperature and fire location parameters can be found.Then the results of finite element analysis were summarized and a commonly used approach for dividing failure areas and dividing va-rious failure number areas was obtained.Combined both of the areas'dividing results together, the degree of fire impact on cables can be gotten immediately.