混凝土巨型箱形截面梁及其设计理论
祝明桥，蒋伟中，霍海强
(湖南科技大学土木工程学院，湖南湘潭411201)
摘要：为了节约土地资源、提高城市交通的使用效率、改善桥梁通行条件，首次提出能使城市桥梁实
现双层交通的“混凝土巨型箱形截面梁”的概念，即通过加大传统混凝土箱梁截面高度，在腹板上开
设必要的孔洞，并使其顶板、底板均成为桥面系，以确保箱内外车辆通行，使城市桥梁实现双层交通
的箱梁。结合工程实践介绍了混凝土箱形截面梁和城市桥梁双层交通的研究现状，并探讨了混凝
土巨型箱形截面梁设计的一系列关键技术问题，填补了无横隔板、腹板大规模设置孔洞的混凝土巨
型箱形梁设计技术的空白，为混凝土巨型箱形截面梁在城市桥梁中的推广应用研究提出了指导性
建议。
关键词：混凝土巨型箱形截面梁；城市桥梁；双层交通；剪力滞后效应；扭转畸变效应
中图分类号：U441．5 文献标志码：A
Concrete Huge Box Section Girder and Its Design Theory
ZHU M ing—qiao，JIANG W ei—zhong，HUO Hai—qiang
(School of Civil Engineering，Hunan University of Science and Technology，Xiangtan 411201，Hunan，China)
Abstract：The concept of“concrete huge box section girder’’for achieving double-deck traffic for
city bridges was first put forward for saving land resource and improving traffic efficiency and
conditions of bridge passage．It referred to box girder with necessary openings in the web plates
which could achieve double—deck traffic for city bridges by m eans of increasing the section height
of the traditional concrete box girder and its roof，floor deck systems became the bridge deck
system．Actual examples of the double—deck traffic were provided on an engineering practice basis
and research situations on concrete box section girder and double—deck traffic for city bridges were
introduced．Some key technological problems in design of concrete huge box section girder were
discussed，which filled the gaps in the field of the design technology of the concrete huge box
section girder without inner plate．Some guiding recommendations of the promotion applications
of concrete huge box section girder for city bridges were proposed
．
Key words：concrete huge box section girder；city bridge；double-deck traffic；shear lag effect；
torsion and distortion effect
引 言
随着中国经济的发展，土地资源的稀缺及桥梁
建设用地的紧张日显突出，同时交通流量的快速增
长，造成多数已建单层交通的城市桥梁日益拥堵，成
为阻碍交通畅通的瓶颈。因此，为在有限的土地资
源及布置空间内极大地提高城市交通的使用效率，
改善桥梁通行条件，双层交通或双层桥面的城市桥

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