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```									                    李其林的答辩信息：

of Bayi Bridge

主席：张开银

委员：

教   授 杨平

教   授 张少雄

副教授 周增国

副教授 向木生

秘书：张嵘峰

讲    师

摘   要

早在 50、60 年代，我国就建造了许多 T 型梁桥，由于结构简单，安装方便

笔者查阅了大量文献，对所研究领域的国内外研究状况及其进展有较全面的

（1）首先按传统计算方法验算主梁承担的设计荷载，分析该桥梁裂缝产生

方案一：横隔板方案，对损坏严重的横隔板进行更换，对焊接质量有问题的

方案二：叠合梁方案，凿除原有桥面铺装，重新布置钢筋网，现浇 15cm 厚

方案三：T 转箱方案，在 T 型梁下方粘贴一层 6mm 厚的钢板，使 T 梁腹板底

（2）利用有限元软件针对三种方案分别建模，对大桥主要结构部位进行力

Ｔ梁翼缘板横向拉应力过大和各Ｔ梁在车载作用下变形不协调。
（3）对三者计算结果进行对比，然后以此为基础进行桥梁加固设计；结果

论文工作对旧桥改造设计有一定指导意义。

Abstract

Back in the 1950s and 1960s, China built many T-beam bridge, as simple
structure, ease of installation, and other characteristics, the type of the bridge to
improve road traffic in China has played an important role. However, as the
development of transport, traffic volume increasing, the increasing load of vehicles, as
well as the increase in life as carriers, T-beam also exposed some problems, because
WING PLATES high beam thickness is much smaller than that if Articulated consider
horizontal beam connection, as WING PLATES connecting the structure of the beam
height and high much difference, the role hinged be very difficult to achieve and does
not provide adequate lateral links, resulting in damage to the connecting WING
PLATES; by has just consider the horizontal beam connected, and if the number of
beams not installed, do not form a horizontal rigid connection, the actual state of the
theory inconsistent with the will of a single beam by too much damage, when their
resistance is weak beam, but also bear more vulnerable because of the lateral bending
of the role of damage to a bridge carrying capacity reduced with each passing year.
Especially before the construction of the bridge, lower design standards, the
development of transport capacity has been unable to meet the needs and reinforced
concrete T-beam bridge with the use of the growth period, and the conservation of not
timely, there will be natural carbonation of concrete surface, Cracks up, the surface
broken, rainwater intrusion, a series of issues such as steel corrosion, the bridge will
eventually lead to decreased capacity, a disease, a disease Bridge, Bridge, or even
serious bridge collapsed, to a certain extent, this has hampered the national economy
development.
In this paper, The author has looked up large amount of information, has been
aware of what be studied the field home and abroad studies situation. Here takes the
Bayi bridge of Xiao Gan City as project background on the basis, carry out analysis
and their strengthening on the disease that exists in the bridge studies.the auther has
been in progress mainly working as follows:
1. The primo pushes down the design load that reckoning checking calculation
main beam bears , analyses the main cause owing a bridge rift creation, and brings
forward two kinds possible strengthening schemes by traditional method ; Scheme
one: Transverse diaphragm scheme , the replacement being in progress to damaging
transverse diaphragm, correct problematic reinforced bar of welding quality steel
plate repairing welding Scheme two: The scheme chisels the bridge face ply except
that original bridge floor shop installing , arranging the reinforced bar net again ,
deposit thickness of 15 cms concrete now , make up into the dyadic overall bridge
face ply, plant certan steel by certain spacing extremely on the top of the T-shape
beams, the reinforced bar with bridge face ply welds feasible bridge face ply and main
beam accept a force , harmonize deformation commonly.
2. Making use of the finite element software of Ansys specifically for three kinds
schemes building a model respectively , location carrying out mechanics on main
structure of bridge; The analysis secretly scheming against indicates vehicle , the
bridge is in under simple armoured concrete branch T-shape beamsbridge condition
leading to T beam wing predestined relationship board under the effect have pulled
strain preparing every T beam greatly transversely after bridge floor direction rift
creation is main since being hit by transverse diaphragm destroying be loaded with
effect lower deformation out of tune.
3. Calculation bear fruit carries out contrast on the both , consolidates and then
design take this as the basis carry out a bridge; Finally indicate a technology , adopt to
establish a tendon, the scheme changing the bridge floor laying the baffle plate
holding tier of strengthening schemes with and consolidating a horizontal stroke
exclusively is compared with each other, not only, the former more excellent , goes to
the lavatory at the same time more on Mechanics index to be under construction, also
more economical reasonableness.
This paper has some guide with the reforming design to old bridge and
construction.

Keywords: old bridge strengthening; T-shape beam bridge; strengthening design;
diapharagm; transverse distribution coefficient; bridge deck pavement; section
coversion

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