高速公路护栏立柱力学特性室内静载试验分析
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摘要
通过设计并进行高速公路护栏立柱力学特性室内静载试验,对旧规范护栏立柱、新规范护栏立柱和升级改造后护栏立柱进行了力学特性测试.通过对试验结果进行对比分析,对该升级改造方案的实际效果进行评价,同时对该升级改造中相关参数进行单一变量试验,得出不同阶段影响立柱可受力峰值的控制因素.研究表明,文中所介绍高速公路旧护栏立柱升级改造方案可以使旧护栏的抗剪抗拉性达到甚至超过新规范护栏性能,且可在一定程度内通过控制立柱内混凝土浇筑高度增强护栏立柱的力学性能,当浇筑高度达到地面平齐高度后,护栏立柱的力学性能所受其影响可以忽略.
In order to test the mechanical properties of the freeway guardrail's columns,including the old standard column,the new standard column and the updated column,an indoor static load test is designed.By comparing and analyzing the results of the test,the actual effect of the updating scheme is assessed.The single variable test on the parameters of the updating scheme is made,which shows the controlling factors of the column's force peak value in different stages.It is shown that the column updating scheme can improve the mechanical properties of the old columns,which would become even better than the new standard columns.To a certain extent,the mechanical properties of the old columns are controlled by the height of the concrete which is poured in the column.When the concrete height reaches the height of the ground,the updating influence of the concrete pouring height can be ignored.
In order to test the mechanical properties of the freeway guardrail's columns,including the old standard column,the new standard column and the updated column,an indoor static load test is designed.By comparing and analyzing the results of the test,the actual effect of the updating scheme is assessed.The single variable test on the parameters of the updating scheme is made,which shows the controlling factors of the column's force peak value in different stages.It is shown that the column updating scheme can improve the mechanical properties of the old columns,which would become even better than the new standard columns.To a certain extent,the mechanical properties of the old columns are controlled by the height of the concrete which is poured in the column.When the concrete height reaches the height of the ground,the updating influence of the concrete pouring height can be ignored.
引文
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2李琦,桑永娜.安新高速公路改扩建工程护栏改造设计.科技信息,2008,31:97
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4 John F,Malcolm H.Reusable high molecular weight/high density polyethylene guardrail.European Classes,EP20030254518,2005
5交通部公路科学研究院JTG/T D81-2006.公路交通安全设施设计细则.北京:人民交通出版社,2006
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7 JTG/T F83>01-2004高速公路护栏安全性能评价标准,2004
8邢小高.高速公路改扩建旧路交通设施再利用技术研究.[硕士论文].天津:河北工业大学,2014
9曾洪飞.桩土共同作用下桩土载荷分担比的计算.[学位论文].上海:同济大学,2004
10张文.水平载荷下桩土共同作用机理研究.[学位论文].南京:东南大学,2012
2李琦,桑永娜.安新高速公路改扩建工程护栏改造设计.科技信息,2008,31:97
3晁兵,陆东方,鹿存才.高速公路旧波形梁板涂装再利用工艺.中国涂料,2007,22(8):35-36
4 John F,Malcolm H.Reusable high molecular weight/high density polyethylene guardrail.European Classes,EP20030254518,2005
5交通部公路科学研究院JTG/T D81-2006.公路交通安全设施设计细则.北京:人民交通出版社,2006
6李霞,田远,崔洪军等.高速公路波形梁护栏安全性能提升方案设计.重庆交通大学学报(自然科学版),http://www.cnki.net/kcms/detail/50.1190.u.20150923.1706.002.html
7 JTG/T F83>01-2004高速公路护栏安全性能评价标准,2004
8邢小高.高速公路改扩建旧路交通设施再利用技术研究.[硕士论文].天津:河北工业大学,2014
9曾洪飞.桩土共同作用下桩土载荷分担比的计算.[学位论文].上海:同济大学,2004
10张文.水平载荷下桩土共同作用机理研究.[学位论文].南京:东南大学,2012