钢—混凝土组合桥面板单向板与双向板区分界限的研究

发布时间：2018-05-28 15:57

本文选题：钢-混凝土组合桥面板 + 单向板　；参考：《西南交通大学》2015年硕士论文

【摘要】：随着钢-混凝土组合桥面板的推广应用,对钢-混凝土组合板的受力性能研究具有十分重要的理论意义和工程应用价值。在实际工程应用中,一般采用单向板或双向板的概念来将桥面板复杂的空间问题简化为平面问题。国内外相关规范根据混凝土板的受力机理,提出将混凝土板的计算分为单向板和双向板并明确提出区分界限,但目前还没有相关规范明确提出钢-混凝土组合板的单向板和双向板区分界限。相对于传统混凝土桥面板,钢-混凝土组合桥面板中钢板材料在力学和几何上存在较大比例,直接套用混凝土桥面板的设计规范没有依据且无法体现组合结构优越的经济性。因此,为了研究钢-混凝土组合板在简化计算时单向板和双向板区分界限值,本文开展了相关专题研究。在典型钢-混凝土组合桥面板实际工程基础上,拟定了钢-混凝土组合桥面板的几何参数。对在均布荷载作用模式下的钢-混凝土组合板,考虑剪力连接程度和不同边界条件。在弹性和弹塑性理论的基础上,研究了材料特性、边界条件及剪力连接程度对板的变形、反力和内力分布的影响规律。引入荷载传递系数,探讨了荷载在钢-混凝土组合桥面板中的传递分配规律。最后,在研究结果的基础上,建议弹性分析情况下长短边比取为3作为界限区分建议值,而在弹塑性分析情况下,该建议值可取为3.5。
[Abstract]:With the popularization and application of steel-concrete composite deck slabs, it is of great theoretical significance and engineering application value to study the mechanical properties of steel-concrete composite slabs. In practical engineering applications, the concept of unidirectional or bidirectional slab is generally adopted to simplify the complex space problem of bridge deck into a plane problem. According to the mechanical mechanism of concrete slabs, the calculation of concrete slabs is divided into unidirectional slabs and bidirectional slabs. However, there are no relevant codes to clearly distinguish the boundary between unidirectional and bidirectional slabs of steel-concrete composite slabs. Compared with the traditional concrete deck slab, the steel plate material in the steel-concrete composite deck slab has a large proportion in mechanics and geometry, and the design code for direct application of concrete deck slab has no basis and can not reflect the superior economy of the composite structure. Therefore, in order to study the boundary value of unidirectional slab and bidirectional slab in simplified calculation of steel-concrete composite slab, this paper carried out a special topic study. On the basis of practical engineering of typical steel-concrete composite deck slabs, the geometric parameters of steel-concrete composite deck slabs are worked out. The shear connection degree and different boundary conditions are considered for steel-concrete composite slabs under uniform load. On the basis of elastic and elastoplastic theory, the effects of material properties, boundary conditions and shear connection degree on the distribution of deformation, reaction force and internal force of the plate are studied. The load transfer distribution in steel-concrete composite deck slab is discussed by introducing load transfer coefficient. Finally, on the basis of the results of the study, it is suggested that in elastic analysis, the ratio of length to side should be taken as 3 as the threshold value, while in the case of elastic-plastic analysis, the suggested value should be 3.5.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.31

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