波形钢腹板组合桥梁温度效应研究
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摘要
波形钢腹板PC组合箱梁桥因顶、底板和腹板材料不同,在日照作用下温度的分布也不同,因此有必要对其温度场进行研究。依托某天桥为实际工程背景,结合理论,通过对该桥的32个测点连续采集90d的数据进行分析,提出了该桥的温度场的两种分布形态,白天因日照影响,波形钢腹板的温度上升较快,高于混凝土顶、底板的温度,竖向分布呈"丿"形;夜间波形钢腹板的温度降低较快,低于顶、底板的温度,竖向分布呈"C"形,并且拟合出适用于关中地区的波形钢腹板PC组合箱梁桥的日照温度梯度模式,对于类似桥梁有一定的借鉴意义。
The temperature distribution of PC composite box girder bridge with corrugated steel web under sunshine is different because of the difference in materials for the top,bottom and web slabs,so it is necessary to study the temperature field.In this paper a flyover bridge is taken as study objective,as per theoretical basis,data at 32 measuring points have been continuously collected in 90 days and two distributions of the temperature field of this bridge are proposed.Due to the impact of sunshine during the day,the temperature of corrugated steel web rises faster,and is higher than that at concrete roof and floor.Its vertical distribution presents a"丿"shape.During the night the temperature decreases rapidly,and is lower than that at concrete roof and floor,and its vertical distribution is"C"shaped.The sunshine temperature gradient mode for PC composite box girder bridge with corrugated steel webs in Guanzhong area is fitted.It can provide some reference for similar bridges.
The temperature distribution of PC composite box girder bridge with corrugated steel web under sunshine is different because of the difference in materials for the top,bottom and web slabs,so it is necessary to study the temperature field.In this paper a flyover bridge is taken as study objective,as per theoretical basis,data at 32 measuring points have been continuously collected in 90 days and two distributions of the temperature field of this bridge are proposed.Due to the impact of sunshine during the day,the temperature of corrugated steel web rises faster,and is higher than that at concrete roof and floor.Its vertical distribution presents a"丿"shape.During the night the temperature decreases rapidly,and is lower than that at concrete roof and floor,and its vertical distribution is"C"shaped.The sunshine temperature gradient mode for PC composite box girder bridge with corrugated steel webs in Guanzhong area is fitted.It can provide some reference for similar bridges.
引文
[1]郭翔飞.波形钢腹板预应力混凝土箱梁温度效应研究[D].西安:长安大学,2011.
[2]刘玉擎.波折腹板组合箱梁桥结构体系分析[J].桥梁建设,2005,(1):1-4.
[3]刘兴法.混凝土结构的温度应力分析[M].北京:人民交通出版社,1991.
[4]朱鹏志.特殊桥梁结构的温度问题研究[D].杭州:浙江大学,2008.
[5]葛耀君,翟东,张国泉.混凝土斜拉桥温度场的试验研究[J].中国公路学报,1996,(2):76-831.
[6]孙全胜,傅科奇.绥芬河斜拉桥转体施工温度影响分析[J].公路交通科技,2006,23(10):55-59.
[7]叶见曙,贾琳,钱培舒.混凝土箱梁温度分布观测与研究[J].东南大学学报:自然科学版,2002,(5):788-7931.
[8]张谢东,蔡素军,石明强.混凝土箱梁温度场观测与分析[J].公路交通科技,2008,25(10):52-57.
[9]夏晚晖.温度对PC连续梁桥测试应力影响的探讨[J].交通科技,2004,(6):1-31.
[10]JTG D60—2004公路桥涵设计通用规范[S].
[11]佘小年,方志,汪剑,等.大跨预应力混凝土连续梁桥的温度效应[J].公路,2003,(11):135-1381.
[12]郭健.混凝土斜拉桥主梁的非稳态温度场与应力场分析[J].中国公路学报,2005,18(2):65-681.
[2]刘玉擎.波折腹板组合箱梁桥结构体系分析[J].桥梁建设,2005,(1):1-4.
[3]刘兴法.混凝土结构的温度应力分析[M].北京:人民交通出版社,1991.
[4]朱鹏志.特殊桥梁结构的温度问题研究[D].杭州:浙江大学,2008.
[5]葛耀君,翟东,张国泉.混凝土斜拉桥温度场的试验研究[J].中国公路学报,1996,(2):76-831.
[6]孙全胜,傅科奇.绥芬河斜拉桥转体施工温度影响分析[J].公路交通科技,2006,23(10):55-59.
[7]叶见曙,贾琳,钱培舒.混凝土箱梁温度分布观测与研究[J].东南大学学报:自然科学版,2002,(5):788-7931.
[8]张谢东,蔡素军,石明强.混凝土箱梁温度场观测与分析[J].公路交通科技,2008,25(10):52-57.
[9]夏晚晖.温度对PC连续梁桥测试应力影响的探讨[J].交通科技,2004,(6):1-31.
[10]JTG D60—2004公路桥涵设计通用规范[S].
[11]佘小年,方志,汪剑,等.大跨预应力混凝土连续梁桥的温度效应[J].公路,2003,(11):135-1381.
[12]郭健.混凝土斜拉桥主梁的非稳态温度场与应力场分析[J].中国公路学报,2005,18(2):65-681.