开孔波折板连接的弹性混凝土—钢组合梁疲劳性能研究
发布时间：2018-09-06 08:23
【摘要】：钢-混凝土组合梁通过抗剪连接件将钢梁和混凝土板连成整体共同受力的横向承重构件,充分发挥型钢受拉,混凝土翼板承受压力的特点。组合梁的破坏一般是由于车荷载的作用下发生疲劳破坏,其破坏的主要特征是剪力连接件发生断裂。剪力连接件是一种把型钢和混凝土板连接在一起共同受力的关键元件,它分为刚性连接件和柔性连接件,其主要形式有栓钉、槽钢、弯起钢筋。本文采用一种新型连接件-开孔波折板剪力连接件,它介于刚性和柔性之间。开孔波折板连接的钢-混凝土组合梁具有承载力高、抗滑移性能强以及整体性能较好的特点。本文以有限元为手段,利用ABAQUS软件建立有限元模型,用波折板抗剪连接件代替传统的栓钉连接件,并引入弹性混凝土,分别考虑不同橡胶掺量、波折板厚度、波折板波高、转折角度、波折板开孔直径、穿孔钢筋直径对波折板抗剪承载力的影响,并根据其荷载-滑移曲线得出波折板抗剪承载力近似公式。在考虑弹性混凝土-钢组合梁单位长度抗剪承载力,建立弹性混凝土组合梁模型,结合局部应力法和Goodman曲线,分析不同橡胶掺量、不同波折板参数对组合梁疲劳寿命的影响。主要结论如下:1)随着橡胶掺量的增加,推出试件中波折板剪力连接件的抗剪承载力下降;随着波折板高度的增高,波折板抗剪承载力增大;开孔直径越大,连接件的抗剪承载力越高;穿孔钢筋直径越大,波折板受剪承载力越高;随着波折板厚度的增高,波折板抗剪承载力增大。2)随着橡胶掺量的增加,弹性混凝土-钢组合梁静力承载力下降,橡胶掺量为10%的弹性混凝土-钢组合梁疲劳寿命最大;随着波折板厚度的增大,弹性混凝土-钢组合梁的疲劳寿命提高;随着波折板转折角度的增大,弹性混凝土-钢组合梁疲劳寿命降低。
[Abstract]:Steel-concrete composite beams combine steel beams and concrete slabs to form transverse load-bearing members through shear connectors, which give full play to the characteristics of section steel under tension and concrete slabs under pressure. The failure of composite beam is generally due to fatigue failure under the action of vehicle load, and the main characteristic of failure is the fracture of shear connection. Shear joint is a kind of key element which connects steel and concrete slabs together. It can be divided into rigid connectors and flexible connectors. The main forms of shear connectors are studs channel steel and bent steel bars. In this paper, a new type of connection-the open-hole corrugated plate shear connection is used, which is between rigidity and flexibility. The steel-concrete composite beams connected with open-hole corrugated plates have the characteristics of high bearing capacity, strong sliding resistance and good overall performance. In this paper, the finite element model is established by means of finite element method and ABAQUS software. The shear joint of corrugated plate is used to replace the traditional bolted joint, and elastic concrete is introduced to consider the different rubber content, the thickness of corrugated plate and the wave height of corrugated plate, respectively. The influence of the turning angle, the diameter of the perforated steel bar and the opening diameter of the corrugated plate on the shear capacity of the corrugated plate is discussed. According to the load-slip curve, the approximate formula of the shear bearing capacity of the corrugated plate is obtained. Considering the shear bearing capacity of elastic concrete-steel composite beam per unit length, the model of elastic concrete composite beam is established. Combined with local stress method and Goodman curve, the influence of different rubber content and different corrugated plate parameters on fatigue life of composite beam is analyzed. The main conclusions are as follows: (1) with the increase of rubber content, the shear bearing capacity of the shear connectors of the wave folded plate decreases with the increase of rubber content, the shear capacity of the corrugated plate increases with the height of the corrugated plate, and the diameter of the opening hole increases. The shear capacity of corrugated plate increases with the increase of the thickness of corrugated plate. 2) with the increase of rubber content, the shear capacity of corrugated plate increases with the increase of the thickness of corrugated plate, the larger the diameter of perforated steel bar is, the higher the shear capacity of corrugated plate is. The static bearing capacity of elastic concrete-steel composite beams decreased, and the fatigue life of elastic concrete-steel composite beams with rubber content of 10% was the largest, and the fatigue life of elastic concrete-steel composite beams increased with the increase of corrugated slab thickness. With the increase of the turning angle of corrugated plate, the fatigue life of elastic concrete-steel composite beam decreases.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
本文编号：2225778
[Abstract]:Steel-concrete composite beams combine steel beams and concrete slabs to form transverse load-bearing members through shear connectors, which give full play to the characteristics of section steel under tension and concrete slabs under pressure. The failure of composite beam is generally due to fatigue failure under the action of vehicle load, and the main characteristic of failure is the fracture of shear connection. Shear joint is a kind of key element which connects steel and concrete slabs together. It can be divided into rigid connectors and flexible connectors. The main forms of shear connectors are studs channel steel and bent steel bars. In this paper, a new type of connection-the open-hole corrugated plate shear connection is used, which is between rigidity and flexibility. The steel-concrete composite beams connected with open-hole corrugated plates have the characteristics of high bearing capacity, strong sliding resistance and good overall performance. In this paper, the finite element model is established by means of finite element method and ABAQUS software. The shear joint of corrugated plate is used to replace the traditional bolted joint, and elastic concrete is introduced to consider the different rubber content, the thickness of corrugated plate and the wave height of corrugated plate, respectively. The influence of the turning angle, the diameter of the perforated steel bar and the opening diameter of the corrugated plate on the shear capacity of the corrugated plate is discussed. According to the load-slip curve, the approximate formula of the shear bearing capacity of the corrugated plate is obtained. Considering the shear bearing capacity of elastic concrete-steel composite beam per unit length, the model of elastic concrete composite beam is established. Combined with local stress method and Goodman curve, the influence of different rubber content and different corrugated plate parameters on fatigue life of composite beam is analyzed. The main conclusions are as follows: (1) with the increase of rubber content, the shear bearing capacity of the shear connectors of the wave folded plate decreases with the increase of rubber content, the shear capacity of the corrugated plate increases with the height of the corrugated plate, and the diameter of the opening hole increases. The shear capacity of corrugated plate increases with the increase of the thickness of corrugated plate. 2) with the increase of rubber content, the shear capacity of corrugated plate increases with the increase of the thickness of corrugated plate, the larger the diameter of perforated steel bar is, the higher the shear capacity of corrugated plate is. The static bearing capacity of elastic concrete-steel composite beams decreased, and the fatigue life of elastic concrete-steel composite beams with rubber content of 10% was the largest, and the fatigue life of elastic concrete-steel composite beams increased with the increase of corrugated slab thickness. With the increase of the turning angle of corrugated plate, the fatigue life of elastic concrete-steel composite beam decreases.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
【参考文献】
相关期刊论文 前10条
1 陈建兵;万水;尤元宝;赵文娟;;基于波折开孔钢板连接件的组合梁受力性能试验研究[J];建筑结构;2012年10期
2 陈建兵;赵文娟;尤元宝;力为为;;基于波折开孔钢板连接件组合梁界面特性有限元分析[J];混凝土与水泥制品;2011年08期
3 茹忠亮;朱传锐;张友良;赵洪波;;断裂问题的扩展有限元法研究[J];岩土力学;2011年07期
4 陈建兵;万水;刘凡;;具有新型连接件的钢-混组合梁界面抗滑移试验与分析研究[J];桥梁建设;2011年03期
5 李淑琴;万水;陈建兵;;一种新型抗剪连接件试验研究[J];桥梁建设;2009年04期
6 王立燕;王超;张亚梅;马爱斌;;运用声发射技术研究橡胶混凝土疲劳损伤过程[J];东南大学学报(自然科学版);2009年03期
7 张劲;王庆扬;胡守营;王传甲;;ABAQUS混凝土损伤塑性模型参数验证[J];建筑结构;2008年08期
8 王挺,聂建国,李炳益,樊健生;钢-压型钢板混凝土组合梁极限抗弯承载力的研究[J];建筑结构学报;2001年02期
9 方立新,宋启根;部分剪切连接组合梁弹性刚度和极限强度的计算[J];工业建筑;2000年01期
10 聂建国,余志武;钢-混凝土组合梁在我国的研究及应用[J];土木工程学报;1999年02期
相关硕士学位论文 前1条
1 王庆余;橡胶集料钢筋混凝土叠合梁受弯性能有限元分析[D];天津大学;2007年
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