简支宽桥分析
发布时间：2019-03-17 16:16
【摘要】：随着交通量不断增大,行车速度的提高,为了适应城市交通的快速发展和道路的不断拓宽,宽梁桥相应而生,在设计建设中扮演着越来越重要的角色。更多桥梁的宽跨比超过1,以至更大。梁桥宽度的增加,使得宽桥结构有着显著的空间受力效应,荷载作用下不仅要考虑桥梁上部构造沿纵向产生弯曲,而且更多地要考虑整个桥梁结构沿横桥向变形。由于装配式简支空心板和简支T梁桥自身的优势和特点而广泛应用到宽梁桥中。对于简支宽桥,桥梁结构表现出双向板的受力特征,使得主梁之间横向协同受力作用不可忽略。因此,分析大宽跨比简支梁桥荷载横向分布规律是必要的,对于宽梁桥的设计、检测加固具有参考意义。本文利用有限元软件建立不同宽跨比的简支空心板宽梁桥和简支T梁桥的有限元模型,展开简支宽梁桥荷载横向分布规律的研究。主要研究内容如下:1.考虑了宽桥荷载横向分布的不同因素,基于荷载横向分布理论中铰接板梁法,建立考虑铰缝损伤后和考虑桥面铺装层共同受力后的铰接板梁法的计算方法,丰富铰接板梁法计算理论;利用建立正交简支空心板桥和简支T梁桥的实体模型,建立正交简支空心板梁桥梁格模型,对比分析通过铰接板梁法和有限元法计算得到的荷载横向分布影响线竖标值,验证建模的合理性。2.基于合理的有限元建模方法建立不同跨径简支空心板宽梁桥和简支T型宽梁桥的有限元模型,开展了桥梁结构宽跨比的变化、桥梁结构跨径的变化、不同桥梁结构横断面截面形式对桥梁结构荷载横向分布的影响分析。并研究出荷载沿桥梁结构横桥向主要影响范围宽度,以此得到合理的桥梁宽度。3.基于对宽桥荷载横向分布研究得到的一般规律理论上进一步对影响宽梁桥横向分布的各个因素及影响程度展开研究,建立装配式简支空心板宽桥的桥梁结构空间模型,探讨铰缝损伤、铰缝混凝土强度等级、桥梁结构桥面系中桥面铺装层对桥梁结构荷载分布及横向连接构造产生的影响。
[Abstract]:With the continuous increase of traffic volume and the increase of driving speed, in order to adapt to the rapid development of urban traffic and the continuous widening of roads, wide-beam bridges play a more and more important role in the design and construction. More bridges have a width-span ratio of more than 1, or even larger. With the increase of beam bridge width, the wide bridge structure has a significant spatial force effect. Under load, not only the upper structure of the bridge should be considered bending along the longitudinal direction, but also the deformation of the bridge structure along the transverse direction should be taken into account. Due to the advantages and characteristics of assembled simply supported hollow plates and simply supported T-beam bridges, they are widely used in wide-beam bridges. For the simple-supported wide bridge, the structure of the bridge shows the characteristics of the two-way plate, which makes the transverse cooperative force between the main beams not to be ignored. Therefore, it is necessary to analyze the transverse load distribution law of simple supported beam bridge with large width-span ratio, which is of reference significance for the design of wide-beam bridge and the detection and reinforcement of the bridge. In this paper, the finite element models of simply supported hollow slab wide beam bridge and T beam bridge with different width to span ratio are established by using finite element software, and the transverse load distribution law of simply supported wide beam bridge is studied. The main contents of the study are as follows: 1. Considering the different factors of lateral load distribution of wide bridge, based on the method of hinged plate beam in the theory of lateral distribution of load, the calculation method of hinged plate beam considering joint damage of hinged joints and joint stress of deck pavement is established. Enrich the calculation theory of hinged plate beam method; The solid models of orthogonal simply supported hollow slab bridge and simply supported T-beam bridge are established, and the lattice models of orthogonal simply supported hollow slab girder bridge are established. The vertical standard values of load transverse distribution influence line calculated by hinged plate beam method and finite element method are compared and analyzed. Verify the rationality of modeling. 2. Based on the reasonable finite element modeling method, the finite element models of simply supported hollow slab wide beam bridges and T wide beam bridges with different spans are established. The change of width to span ratio of bridge structure and span change of bridge structure are carried out. The influence of different cross-section forms of bridge structure on the transverse load distribution of bridge structure is analyzed. The width of the main influence range along the transverse direction of the bridge structure is studied, and the reasonable width of the bridge is obtained. 3. Based on the general law obtained from the research on the lateral distribution of load of wide bridge, the factors affecting the lateral distribution of wide-beam bridge and the degree of influence are further studied theoretically, and the spatial model of the bridge structure of the assembled simply supported hollow slab wide bridge is established. The influence of joint damage, joint concrete strength grade, deck pavement in bridge deck system on load distribution and transverse connection structure of bridge structure is discussed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442
本文编号：2442461
[Abstract]:With the continuous increase of traffic volume and the increase of driving speed, in order to adapt to the rapid development of urban traffic and the continuous widening of roads, wide-beam bridges play a more and more important role in the design and construction. More bridges have a width-span ratio of more than 1, or even larger. With the increase of beam bridge width, the wide bridge structure has a significant spatial force effect. Under load, not only the upper structure of the bridge should be considered bending along the longitudinal direction, but also the deformation of the bridge structure along the transverse direction should be taken into account. Due to the advantages and characteristics of assembled simply supported hollow plates and simply supported T-beam bridges, they are widely used in wide-beam bridges. For the simple-supported wide bridge, the structure of the bridge shows the characteristics of the two-way plate, which makes the transverse cooperative force between the main beams not to be ignored. Therefore, it is necessary to analyze the transverse load distribution law of simple supported beam bridge with large width-span ratio, which is of reference significance for the design of wide-beam bridge and the detection and reinforcement of the bridge. In this paper, the finite element models of simply supported hollow slab wide beam bridge and T beam bridge with different width to span ratio are established by using finite element software, and the transverse load distribution law of simply supported wide beam bridge is studied. The main contents of the study are as follows: 1. Considering the different factors of lateral load distribution of wide bridge, based on the method of hinged plate beam in the theory of lateral distribution of load, the calculation method of hinged plate beam considering joint damage of hinged joints and joint stress of deck pavement is established. Enrich the calculation theory of hinged plate beam method; The solid models of orthogonal simply supported hollow slab bridge and simply supported T-beam bridge are established, and the lattice models of orthogonal simply supported hollow slab girder bridge are established. The vertical standard values of load transverse distribution influence line calculated by hinged plate beam method and finite element method are compared and analyzed. Verify the rationality of modeling. 2. Based on the reasonable finite element modeling method, the finite element models of simply supported hollow slab wide beam bridges and T wide beam bridges with different spans are established. The change of width to span ratio of bridge structure and span change of bridge structure are carried out. The influence of different cross-section forms of bridge structure on the transverse load distribution of bridge structure is analyzed. The width of the main influence range along the transverse direction of the bridge structure is studied, and the reasonable width of the bridge is obtained. 3. Based on the general law obtained from the research on the lateral distribution of load of wide bridge, the factors affecting the lateral distribution of wide-beam bridge and the degree of influence are further studied theoretically, and the spatial model of the bridge structure of the assembled simply supported hollow slab wide bridge is established. The influence of joint damage, joint concrete strength grade, deck pavement in bridge deck system on load distribution and transverse connection structure of bridge structure is discussed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442
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