城市人行天桥深度绿化与结构性能影响分析  

Analysis of Effect of Deep Greening on Structural Performance of Urban Pedestrian Bridges

作　　者：陈鹏 安里鹏 李森 李建章 陈豪杰 Chen Peng;An Lipeng;Li Sen;Li Jianzhang;Chen Haojie(Xi'an Branch of Shanghai Municipal Engineering Design and Research Institute(Group)Co.,Ltd.,Xi'an 710000,China;Foshan University,Foshan 528011,China;Shanghai Municipal Treble Design Institute Co.,Ltd.,Shanghai 200030,China;Atkins,Dublin,Ireland)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司西安分公司,陕西西安710000 [2]佛山科学技术学院,广东佛山528011 [3]上海市政交通设计研究院有限公司,上海200030 [4]阿特金斯集团,都柏林

出　　处：《市政技术》2023年第4期19-25,75,共8页Journal of Municipal Technology

摘　　要：伴随着生态城市、绿色城市理念的贯彻实施,桥梁绿化已成为桥梁建设的重要组成部分。通过桥梁绿化既可丰富城市景观层次、美化环境,又可有效减轻城市热岛效应,改善人们出行环境。但现有的桥梁绿化存在植物成活率低、养护困难、布置形式单一等问题,难以达到上述效果。因此以陕西省西安市某环形人行天桥为例,提出了一种全新的中承式绿化方式,通过优化桥梁断面、调整绿化位置、增加土壤厚度等方式来保证绿化效果;同时建立全桥三维异形板单元模型模拟了不同绿化方式下的桥梁受力,分析了不同绿化方式对桥梁性能的影响。分析结果表明,在桥梁梁高、约束、绿植种类等条件相同的情况下,通过增加板厚和加劲肋等构造措施可使桥梁整体性能满足规范要求。With the initiative of Eco-city and Green city in urban planning,bridge greening has become an important part of bridge design.It not only can enrich urban landscape and beautify the environment but also effectively reduce the urban heat island effect and improve the traffic conditions.However,there are problems of low survival rate,difficult maintenance and single layout in the existing bridge greening which make the above greening goals unachievable.Therefore,taking a circular pedestrian bridge in Xi'an City,Shanxi Province as an example,this paper proposed a new bridge greening method-the mid-support greening,which can ensure the greening effect by optimizing the bridge cross-section,change the installation position of the planter,increase the soil thickness;A 3D full bridge model was established to simulate the bridge stress by different greening methods.The effects of different greening methods on bridge performance were analyzed.The results show that the overall performance of the bridge can meet the requirements of the specification by increasing the plate thickness and stiffening plates under the same conditions of the bridge beam height,constraints and types of green plants.

关 键 词：人行天桥 中承式绿化 全桥模拟 异型板单元 结构性能 

分 类 号：U44&15[建筑科学—桥梁与隧道工程]