大跨径覆土波形钢板桥涵的静力和动力分析
发布时间：2019-01-05 14:57
【摘要】：覆土波形钢板桥涵具有施工快、建造和维修费用低和造型优美等优势而在国内外广泛地应用于公路和铁路工程。由于应用及研究起步较晚,相比国外一些发达国家,我国的研究状况较为滞后。当前国内静力方面研究的大多是中小跨径桥涵受力特性;动力方面主要是冲击系数及自振特性的研究,对于在地震作用下结构的受力性能的研究较少。因此,对于大跨径覆土波形钢板桥涵的静力和动力尤其是抗震性能的研究很有必要。本文对一跨径为12m的圆弧型覆土波形钢板桥涵建立了三维模型进行了静力分析,通过有限元模型计算,得到了最大压应力在波形钢板中的分布规律。对比了 ANSYS计算出的最大压应力与AISI和CHBDC两规范的差异,并且分析了出现差异的原因,结果表明ANSYS计算的结果比较可靠。建立了二维有限元模型,分析了覆土波形钢板结构中影响波形钢板拱顶竖向变形及应力的因素。结果表明:波形钢板的竖向变形随填土厚度的增加而增大,随回填土变形模量、波形尺寸、壁厚的增加而减小,总应力随填土厚度的增加而增大,并且影响显著。总应力随壁厚增加而减小,并且影响较为显著,土体变形模量和波形尺寸对总应力的影响并不明显。通过对结构施加2条天然波和1条人工波的加速度一致激励,研究了结构在地震作用下位移和应力随时间变化的规律,研究表明:结构的最大水平位移和最大竖向位移均位于拱肩处,位移的最大值为2.78mm;水平应力的最大值位于拱肩处,大小为0.508MPa;竖向应力的最大值位于拱脚处,大小为0.962MPa;最大压应力的最大值同样位于拱脚处,大小为0.953MPa。在地震作用下,结构的最大变形和最大应力均很小,说明覆土波形钢板桥涵具有很好的抗震性能。
[Abstract]:With the advantages of fast construction, low cost of construction and maintenance, and beautiful shape, the bridge and culvert with corrugated steel plate are widely used in highway and railway engineering at home and abroad. Because of the late start of application and research, the research situation of our country lags behind that of some developed countries. At present, most of the static research in China is on the mechanical characteristics of bridge and culvert with medium and small span, while the dynamic aspects are mainly on the impact coefficient and the natural vibration characteristics, but the research on the mechanical behavior of the structure under earthquake action is less. Therefore, it is necessary to study the static and dynamic behavior, especially the seismic behavior of long span soil covered corrugated steel plate bridges and culverts. In this paper, a three-dimensional model of a curved corrugated steel plate bridge and culvert with a span of 12 m is established. The distribution of the maximum compressive stress in the corrugated steel plate is obtained by finite element model calculation. The difference between the maximum compressive stress calculated by ANSYS and that of AISI and CHBDC is compared, and the reasons for the difference are analyzed. The results show that the results of ANSYS calculation are reliable. A two-dimensional finite element model was established and the factors affecting vertical deformation and stress of the corrugated steel plate vault were analyzed. The results show that the vertical deformation of the corrugated steel plate increases with the increase of the fill thickness, decreases with the increase of the deformation modulus, wave size and wall thickness of the backfill, and the total stress increases with the increase of the fill thickness, and the effect is significant. The total stress decreases with the increase of wall thickness, and the influence is obvious, but the influence of deformation modulus and waveform size on the total stress is not obvious. By applying the acceleration of two natural waves and one artificial wave to the structure, the variation of displacement and stress with time under earthquake is studied. The results show that the maximum horizontal displacement and the maximum vertical displacement are located at the arch shoulder and the maximum displacement is 2.78 mm. The maximum value of horizontal stress is at the arch shoulder with the size of 0.508MPa, the maximum of vertical stress is at the arch foot (0.962MPa), and the maximum of the maximum compressive stress is also located at the arch foot (0.953MPa). The maximum deformation and maximum stress of the structure are very small under the action of earthquake, which indicates that the bridge and culvert with corrugated steel plate have good seismic performance.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.36
本文编号：2401920
[Abstract]:With the advantages of fast construction, low cost of construction and maintenance, and beautiful shape, the bridge and culvert with corrugated steel plate are widely used in highway and railway engineering at home and abroad. Because of the late start of application and research, the research situation of our country lags behind that of some developed countries. At present, most of the static research in China is on the mechanical characteristics of bridge and culvert with medium and small span, while the dynamic aspects are mainly on the impact coefficient and the natural vibration characteristics, but the research on the mechanical behavior of the structure under earthquake action is less. Therefore, it is necessary to study the static and dynamic behavior, especially the seismic behavior of long span soil covered corrugated steel plate bridges and culverts. In this paper, a three-dimensional model of a curved corrugated steel plate bridge and culvert with a span of 12 m is established. The distribution of the maximum compressive stress in the corrugated steel plate is obtained by finite element model calculation. The difference between the maximum compressive stress calculated by ANSYS and that of AISI and CHBDC is compared, and the reasons for the difference are analyzed. The results show that the results of ANSYS calculation are reliable. A two-dimensional finite element model was established and the factors affecting vertical deformation and stress of the corrugated steel plate vault were analyzed. The results show that the vertical deformation of the corrugated steel plate increases with the increase of the fill thickness, decreases with the increase of the deformation modulus, wave size and wall thickness of the backfill, and the total stress increases with the increase of the fill thickness, and the effect is significant. The total stress decreases with the increase of wall thickness, and the influence is obvious, but the influence of deformation modulus and waveform size on the total stress is not obvious. By applying the acceleration of two natural waves and one artificial wave to the structure, the variation of displacement and stress with time under earthquake is studied. The results show that the maximum horizontal displacement and the maximum vertical displacement are located at the arch shoulder and the maximum displacement is 2.78 mm. The maximum value of horizontal stress is at the arch shoulder with the size of 0.508MPa, the maximum of vertical stress is at the arch foot (0.962MPa), and the maximum of the maximum compressive stress is also located at the arch foot (0.953MPa). The maximum deformation and maximum stress of the structure are very small under the action of earthquake, which indicates that the bridge and culvert with corrugated steel plate have good seismic performance.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.36
【参考文献】
相关期刊论文 前10条
1 郭沉稳;姚令侃;段书苏;黄艺丹;;汶川、芦山、尼泊尔地震触发崩塌滑坡分布规律[J];西南交通大学学报;2016年01期
2 方诗圣;邹祥强;黄志福;刘宏伟;;地震作用下多孔钢波纹板拱桥力学分析[J];世界桥梁;2015年03期
3 唐项亮;;浅析公路钢波纹板桥涵应用与发展[J];工程与建设;2014年05期
4 杨智;赵敏霞;;论地震灾害危害及预防[J];科技与创新;2014年08期
5 郝凯荣;;波纹钢板涵洞在公路上的应用浅析[J];公路交通科技(应用技术版);2013年S1期
6 李百建;符锌砂;;低拱型波形钢板桥梁有限元分析[J];公路交通科技;2013年07期
7 李百建;符锌砂;李宁远;;波形钢板桥梁活载及弯矩计算数值分析[J];公路工程;2013年02期
8 李百建;符锌砂;;波形钢板三维模型与二维模型对比研究[J];科学技术与工程;2012年23期
9 骆志红;;大直径钢波纹管涵有限元计算分析[J];交通科技;2011年01期
10 周发江;;地震危害及地震预警研究[J];改革与开放;2010年08期
，本文编号：2401920
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2401920.html
