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郑州十七里河公园景观桥结构设计研究
Structural design and research of Landscape Bridge of 17 Mile River Park in Zhengzhou

作  者: (常建宝); (胡小波);

机构地区: 中联环股份有限公司,福建厦门361004

出  处: 《福建建筑》 2017年第9期71-75,共5页

摘  要: 郑州十七里河公园景观桥属于人行景观桥。尺寸和荷载等级不同于传统车行拱桥,文章分析了传统拱桥、钢桁架拱桥的优缺点之后,结合景观桥的自身特点,去除了传统拱桥的主要受力构件-拱圈,使得变截面大梁成为主要受力构件,形成了无拱圈的轻型桥体结构。对变截面大梁采用两种边界假定进行平面应力分析,发现变截面大梁对纵向位移极为敏感。为此通过建立桥-桩整体模型,根据位移和桩数的相互依存关系,采用通过工程经验预估桩数,反复调整桩数使得大梁配筋在一个合理范围内的设计方法。 Landscape bridge of 17 mile river park in Zhengzhou is one kind of footbridge. Both of the size and the load level is completely different to the car bridge,the advantages and disadvantages between the traditional arch bridge and steel truss arch bridge were analyzed,combined the characteristics with the landscape bridge,the arch ring which is main support part were removed,so the beam which is the variable size became the main support part,finally,light bridge structure without arch ring is formed. Two kinds of boundary conditions were used to analyze the stress of the beam,the results showed that the beam with variable cross-section is very sensitive to the longitudinal displacement,according to the engineering experiences and relationships between the displacemen and the pile numbers,method is formed by adjusting the pile numbers many times in the integral model of bridge—pile,Also,the reasonable range of the reinforcement of the beam is ensured.

关 键 词: 景观桥 拱圈 变截面梁 平面应力单元 有限元

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