常温养护下正交异性钢板-RPC组合桥面力学研究
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摘要
为了解决正交异性桥面板铺装破坏和钢桥面板开裂的问题,提出一种常温养护下正交异性钢板-活性粉末混凝土(RPC)组合桥面结构体系。基于某大桥建立局部有限元模型,并计算对比常温RPC组合箱梁、纯钢箱梁、高温RPC组合箱梁和普通混凝土组合箱梁的桥面系应力状态;同时开展局部模型静载试验。研究结果表明:常温养护下RPC抗压强度、抗折强度和弹性模量与普通混凝土相比有明显的提高;常温养护的RPC组合箱梁的RPC层拉应力达到了6.45 MPa,未出现裂缝,此应力远高于普通混凝土的抗拉强度,从而为解决桥面铺装破坏提供了思路;常温RPC组合箱梁和高温RPC组合箱梁桥面板应力降幅都超过了80%,明显大于普通混凝土组合箱梁,从而改善桥面板疲劳性能。常温养护的RPC在施工现场便于制作,应用前景较好。
In order to solve the problem of bridge deck pavement damage and steel bridge deck cracking,the orthotropic steel plate-reactive powder concrete(RPC) composite deck structure system under normal temperature is proposed.A local finite element model is established based on a bridge,and the stress states of the bridge systems in pure steel box girder,room temperature RPC composite box girder,high temperature RPC composite box girder and ordinary concrete composite box girder are calculated and compared.At the same time,local model static load test is carried out.The results show that the compressive strength,flexural strength and elastic modulus of RPC under normal temperature curing are obviously improved compared with ordinary concrete.The tensile stress of RPC composite boxgirder under normal temperature curing reaches 6.45 MPa with no crack in place.This stress is much higher than the tensile strength of the ordinary concrete,providing a means to solve the bridge pavement failure.The deck stress drops of both the RPC composite box girder under normal temperature curing and the RPC composite box girder under high temperature curing exceed 80%,and are obviously greater than that of the ordinary concrete composite box girder,which greatly improves the fatigue life of the bridge deck.Meanwhile,RPC at room curing temperature is made conveniently at the construction site and will see extensive application.
In order to solve the problem of bridge deck pavement damage and steel bridge deck cracking,the orthotropic steel plate-reactive powder concrete(RPC) composite deck structure system under normal temperature is proposed.A local finite element model is established based on a bridge,and the stress states of the bridge systems in pure steel box girder,room temperature RPC composite box girder,high temperature RPC composite box girder and ordinary concrete composite box girder are calculated and compared.At the same time,local model static load test is carried out.The results show that the compressive strength,flexural strength and elastic modulus of RPC under normal temperature curing are obviously improved compared with ordinary concrete.The tensile stress of RPC composite boxgirder under normal temperature curing reaches 6.45 MPa with no crack in place.This stress is much higher than the tensile strength of the ordinary concrete,providing a means to solve the bridge pavement failure.The deck stress drops of both the RPC composite box girder under normal temperature curing and the RPC composite box girder under high temperature curing exceed 80%,and are obviously greater than that of the ordinary concrete composite box girder,which greatly improves the fatigue life of the bridge deck.Meanwhile,RPC at room curing temperature is made conveniently at the construction site and will see extensive application.
引文
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[4]张清华,卜一之,李乔.正交异性钢桥面板疲劳问题的研究进展[J].中国公路学报,2017,30(3):14-30,39.
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[12]李嘉,冯啸天,邵旭东,等.STC钢桥面铺装新体系的力学计算与实桥试验对比分析[J].中国公路学报,2014,27(3):39-45.
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[15]何峰,黄政宇.活性粉末混凝土原材料及配合比设计参数的选择[J].新型建筑材料,2007,34(3):74-77.
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[18]邵旭东,张哲,刘梦麟,等.正交异性钢-RPC组合桥面板弯拉强度的实验研究[J].湖南大学学报(自然科学版),2012,39(10):7-13.
[19]刘世忠,冀伟,毛亚娜,等.鱼腹式钢箱梁正交异性桥面板复合铺装层有限元分析及试验研究[J].土木工程学报,2011,44(S1):128-134.
[20]邵旭东,曹君辉,易笃韬,等.正交异性钢板-薄层RPC组合桥面基本性能研究[J].中国公路学报,2012,25(2):40-45.
[2]王春生,付炳宁,张芹,等.正交异性钢桥面板足尺疲劳试验[J].中国公路学报,2013,26(2):69-76.
[3]《中国公路学报》编辑部.中国桥梁工程学术研究综述·2014[J].中国公路学报,2014,27(5):1-96.
[4]张清华,卜一之,李乔.正交异性钢桥面板疲劳问题的研究进展[J].中国公路学报,2017,30(3):14-30,39.
[5]王占飞,程浩波,程志彬,等.桥面铺装对正交异性钢桥面板疲劳性能的影响[J].沈阳建筑大学学报(自然科学版),2018,34(2):257-266.
[6]Robert Gaul.A long life pavement for orthotropic bridge decks in China[C]∥Proceedings of Selected Papers from the 2009 Geo Huan International Conference.Reston,America,2009,196:1-8.
[7]谭茶生,刘永光,曾庆敦.计及界面损伤的钢纤维混凝土桥面铺装层破坏分析[J].中外公路,2010,30(1):166-170.
[8]丁庆军,张锋,林青,等.轻质混凝土钢桥面铺装研究与应用[J].中外公路,2006,26(4):188-190.
[9]姚志雄.活性粉末混凝土力学特性及疲劳寿命研究[J].铁道科学与工程学报,2016,13(7):1275-1281.
[10]曹君辉,邵旭东,张哲,等.正交异性钢板-薄层RPC组合桥面结构理论与试验研究[C]∥中国土木工程学会桥梁及结构工程分会.第二十届全国桥梁学术会议论文集(下册).北京:人民交通出版社,2012.
[11]李嘉,冯啸天,邵旭东,等.正交异性钢桥面-RPC薄层组合铺装体系研究[J].湖南大学学报,2012,39(12):7-12.
[12]李嘉,冯啸天,邵旭东,等.STC钢桥面铺装新体系的力学计算与实桥试验对比分析[J].中国公路学报,2014,27(3):39-45.
[13]辜杰凯.超薄沥青混凝土与RPC组合钢桥面铺装试验研究[D].长沙:湖南大学,2012.
[14]毛军,张后禅.养护制度对活性粉末混凝土力学性能影响[J].低温建筑技术,2011,33(7):9-10.
[15]何峰,黄政宇.活性粉末混凝土原材料及配合比设计参数的选择[J].新型建筑材料,2007,34(3):74-77.
[16]王文前.装配式钢-RPC轻型组合桥面结构关键技术研究[D].长沙:湖南大学,2013.
[17]张慧.大宽跨比正交异性板鱼腹式多室薄壁箱梁结构受力性能和试验研究[D].兰州:兰州交通大学,2012.
[18]邵旭东,张哲,刘梦麟,等.正交异性钢-RPC组合桥面板弯拉强度的实验研究[J].湖南大学学报(自然科学版),2012,39(10):7-13.
[19]刘世忠,冀伟,毛亚娜,等.鱼腹式钢箱梁正交异性桥面板复合铺装层有限元分析及试验研究[J].土木工程学报,2011,44(S1):128-134.
[20]邵旭东,曹君辉,易笃韬,等.正交异性钢板-薄层RPC组合桥面基本性能研究[J].中国公路学报,2012,25(2):40-45.