忻州市云中河傅山路桥总体设计
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摘要
忻州市云中河傅山路桥是规划中连通云中河两岸路网的重要通道,也是云中河的重要景观节点。在满足道路通行基本功能的前提下,经过重点考虑桥梁整体景观效果的综合比选,该桥采用主跨90m下承式复式钢箱系杆拱梁组合桥方案,为拱梁固结、墩梁分离的连续结构体系,桥面标准宽度为43.5m,设置双向8车道。主梁采用单箱多室大悬臂混凝土箱形截面,主、副拱肋均采用梯形钢箱截面,拱脚位置设置系杆索平衡水平推力。该桥按照索辅梁桥理念进行设计,主梁承担约70%的恒载,通过充分发挥主梁的承载能力,提高结构效率,降低拱肋负荷,减小拱肋尺寸,实现桥梁结构创新、桥梁美学与工程经济的融合;通过采用可单根张拉、单根换索的钢绞线系杆索以及带PBL剪力键的钢-混接头方案增强结构的耐久性。
The Fushan Road Bridge crossing Yunzhonghe River in Xinzhou creates an important connectivity to the road networks on the two banks of the river as well as an imposing landscape for the region.On the premise that the basic transporting functions of the bridge be fulfilled,a scheme of combined duplex through-type steel box tied arch and girder bridge was determined based on the comprehensive comparison and selection of the integrated landscape effect.The bridge is a continuous structural system,in which the arch ribs and the girder are fixed and the piers and the girder are separated.The standard width of the bridge is 43.5m,bearing duel 8lanes.The main girder adopts the multi-cell single box long-cantilever concrete box section,the main and secondary arch ribs adopt the trapezoidal steel box section,and at the arch springs,tie ropes are added to balance horizontal thrust.The bridge is designed following the concept of using tie ropes to assist the girder,where the girder carries about 70% of the dead load.By making full use of the load bearing capacity of the main girder,improving the structural efficiency,reducing the loads on the arch ribs and scaling down the dimension of arch ribs,the three aspects of bridge structure innovation,aesthetic effect and economic performance are well balanced.Furthermore,tie ropes made up of steel strands capable of being tensioned and replaced individually are used and the scheme of adopting the steel-concrete joints with PBL shear studs are employed to strengthen the durability of the structure.
The Fushan Road Bridge crossing Yunzhonghe River in Xinzhou creates an important connectivity to the road networks on the two banks of the river as well as an imposing landscape for the region.On the premise that the basic transporting functions of the bridge be fulfilled,a scheme of combined duplex through-type steel box tied arch and girder bridge was determined based on the comprehensive comparison and selection of the integrated landscape effect.The bridge is a continuous structural system,in which the arch ribs and the girder are fixed and the piers and the girder are separated.The standard width of the bridge is 43.5m,bearing duel 8lanes.The main girder adopts the multi-cell single box long-cantilever concrete box section,the main and secondary arch ribs adopt the trapezoidal steel box section,and at the arch springs,tie ropes are added to balance horizontal thrust.The bridge is designed following the concept of using tie ropes to assist the girder,where the girder carries about 70% of the dead load.By making full use of the load bearing capacity of the main girder,improving the structural efficiency,reducing the loads on the arch ribs and scaling down the dimension of arch ribs,the three aspects of bridge structure innovation,aesthetic effect and economic performance are well balanced.Furthermore,tie ropes made up of steel strands capable of being tensioned and replaced individually are used and the scheme of adopting the steel-concrete joints with PBL shear studs are employed to strengthen the durability of the structure.
引文
[1]梁艳,陈艾荣.城市标志性桥梁设计原则[J].桥梁建设,2006,(5):48-50.
[2]赖亚平,邓宇,安金星,等.忻州市云中河景观桥方案设计[J].重庆交通大学学报(自然科学版),2012,31(S1):690-695.
[3]李亚东,姚昌荣,梁艳.浅论拱桥的技术进步与挑战[J].桥梁建设,2012,42(2):13-20.
[4]石岩,王军文,秦洪果,等.桥梁抗震挡块研究进展[J].世界地震工程,2013,41(2):90-95.
[5]Man-Chung Tang.Rethinking Bridge Design:A New Configuration[J].Civil Engineering(ASCE),2007,77(7):38-45.
[6]王标新,朱国华.大悬臂展翼斜腹板连续箱梁在城市桥梁中的设计与应用[J].中外公路,2010,(1):159-162.
[7]肖林,强士中,李小珍,等.考虑开孔钢板厚度的PBL剪力键力学性能研究[J].工程力学,2012,(8):282-288.
[8]刘安双,刘雪山,代彤,等.重庆石板坡长江大桥复线桥钢-混凝土接头设计[J].桥梁建设,2007,(2):35-38.
[9]米曦亮,李东.中承式系杆拱桥结构优化设计[J].桥梁建设,2010,(6):58-62.
[10]邢云,赵荣欣,李博.系杆拱桥典型架设方法的施工控制研究[J].桥梁建设,2012,42(1):42-47.
[11]张同飞.先梁后拱施工的系杆拱桥吊杆张拉方案研究[J].铁道标准设计,2011,(7):65-68.
[2]赖亚平,邓宇,安金星,等.忻州市云中河景观桥方案设计[J].重庆交通大学学报(自然科学版),2012,31(S1):690-695.
[3]李亚东,姚昌荣,梁艳.浅论拱桥的技术进步与挑战[J].桥梁建设,2012,42(2):13-20.
[4]石岩,王军文,秦洪果,等.桥梁抗震挡块研究进展[J].世界地震工程,2013,41(2):90-95.
[5]Man-Chung Tang.Rethinking Bridge Design:A New Configuration[J].Civil Engineering(ASCE),2007,77(7):38-45.
[6]王标新,朱国华.大悬臂展翼斜腹板连续箱梁在城市桥梁中的设计与应用[J].中外公路,2010,(1):159-162.
[7]肖林,强士中,李小珍,等.考虑开孔钢板厚度的PBL剪力键力学性能研究[J].工程力学,2012,(8):282-288.
[8]刘安双,刘雪山,代彤,等.重庆石板坡长江大桥复线桥钢-混凝土接头设计[J].桥梁建设,2007,(2):35-38.
[9]米曦亮,李东.中承式系杆拱桥结构优化设计[J].桥梁建设,2010,(6):58-62.
[10]邢云,赵荣欣,李博.系杆拱桥典型架设方法的施工控制研究[J].桥梁建设,2012,42(1):42-47.
[11]张同飞.先梁后拱施工的系杆拱桥吊杆张拉方案研究[J].铁道标准设计,2011,(7):65-68.
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