薄壁钢护筒-钢筋混凝土柱偏心受压破坏机理研究
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摘要
薄壁钢护筒与钢筋混凝土联合受力架空直立式作为一种新的码头结构形式逐渐被应用到实际工程中,然而绝大多数的组合构件处于偏心受压状态。目前对应用于码头结构的薄壁钢护筒-钢筋混凝土组合结构偏心受压承载性能的研究较少,还未有定论。对薄壁钢护筒-钢筋混凝土柱进行单向偏心受压承载性能试验,通过各试件的破坏状态和试验数据,得到荷载-应变曲线,分析其破坏机理。结果表明:钢护筒壁厚的增大和偏心率的减小对结构承载性能提升有直接影响,可为实际工程中的结构设计提供参考。
The thin-walled reinforced concrete-filled steel tube composite overhead-vertical structure, as a new type of wharf structure, is applied to practical engineering. However, most of the composite members are in eccentric compression state.At present,there are few researches about the eccentric compressive bearing capacity of thin-walled steel sheath-reinforced concrete composite structures applied to wharf structures,and the final conclusion is still unknown. We make an experiment of the bearing capacity of thin-walled steel tube-reinforced concrete columns under unidirectional eccentric compression,obtain the load-strain curves by failure state and test data of each specimen,and analyze the failure mechanism. The results show that the increase of wall thickness and the decrease of eccentricity have a direct impact on the improvement of bearing capacity of the structure, which can provide reference for the structure design in practical engineering.
The thin-walled reinforced concrete-filled steel tube composite overhead-vertical structure, as a new type of wharf structure, is applied to practical engineering. However, most of the composite members are in eccentric compression state.At present,there are few researches about the eccentric compressive bearing capacity of thin-walled steel sheath-reinforced concrete composite structures applied to wharf structures,and the final conclusion is still unknown. We make an experiment of the bearing capacity of thin-walled steel tube-reinforced concrete columns under unidirectional eccentric compression,obtain the load-strain curves by failure state and test data of each specimen,and analyze the failure mechanism. The results show that the increase of wall thickness and the decrease of eccentricity have a direct impact on the improvement of bearing capacity of the structure, which can provide reference for the structure design in practical engineering.
引文
[1]王元战,孙艺,黄长虹.高桩码头钢筋混凝土构件抗力随时间变化模型研究[C]//中国土木工程学会港口工程分会.港口工程分会技术交流文集.北京:人民交通出版社,2005:210-219.
[2]王元战,田双珠,黄长虹,等.考虑抗力时变特性的高桩码头结构全寿命可靠度分析[J].港工技术, 2011,48(5):21-25.
[3]汪承志,刘建国,石兴勇.钢护筒与钢筋混凝土联合受力的内河大水差架空直立式码头力学特性分析[J].水运工程,2012(6):115-120.
[4]曹周红,刘晓平,沈志刚.山区河流码头型式及其发展趋势[J].湖南交通科技,2004,30(2):90-92.
[2]王元战,田双珠,黄长虹,等.考虑抗力时变特性的高桩码头结构全寿命可靠度分析[J].港工技术, 2011,48(5):21-25.
[3]汪承志,刘建国,石兴勇.钢护筒与钢筋混凝土联合受力的内河大水差架空直立式码头力学特性分析[J].水运工程,2012(6):115-120.
[4]曹周红,刘晓平,沈志刚.山区河流码头型式及其发展趋势[J].湖南交通科技,2004,30(2):90-92.