A Calculation Method for Hinge Joint Shear Force of Simply Supported Hollow Slab Bridges Considering Hinge Joint Damage
A technology of hollow slab bridge and calculation method, which is applied in the direction of bridges, bridge materials, bridge construction, etc., can solve the problem of not having the function of calculating the shear force of damaged hinged joints, not considering the damage degree of hinged joints and the change of hinged joint stiffness, hinged joints Problems such as insufficient maintenance and reinforcement information
Active Publication Date: 2021-10-22
HUA HUI ENGINEERING DESIGN GROUP CO LTD +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
All the above methods for calculating the shear force of the damaged hinge joint consider the entire hinge joint as a whole, which is a one-dimensional calculation method and cannot directly reflect the specific damage location and damage degree of the hinge joint. Insufficient information for reinforcement
[0004] The rest of the methods that can calculate the shear force of hinge joints of hollow slabs are the finite element method, but the commonly used bridge software such as Bridge Doctor does not have the calculation function of the shear force of damaged hinge joints, and although Midas can use the beam lattice method for calculation, it can only In the case of given hinge damage degree and hinge stiffness, the change of hinge damage degree and hinge stiffness under load cannot be considered
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0068] Please refer to the attached figure 1 As shown, the present invention is a method for calculating the shear force of the hollow plate hinge joint considering the damage of the hinge joint, which includes the following process steps:
[0069] 1) Determine the basic physical parameters and material properties of the hollow slab bridge:
[0070] The basic physical parameters include: the span L, the number of plates N, the cross-sectional shape of the hollow slab or directly provide the values of the bending stiffness and torsional stiffness of the hollow slab, the cracking position of the hinge joint and the thickness of the bridge deck h d ;
[0071] The material properties include: the shear force-slip relationship formula of the hinge joint of the hollow slab bridge per unit length, the concrete elastic modulus E, and Poisson's ratio μ;
[0072] Among them, the shear force-slip relationship can be expressed as:
[0073] Before cracking: V=K c S(0≤Sc );
[0074] ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for calculating hinge joint shear force of a simply supported hollow slab bridge considering hinge joint damage. The method compares a single hollow slab to an orthotropic slab, and solves the single plate equation based on the Levy solution to obtain the plate boundary deflection and shear force. After the force expression, the multi-slabs are assembled into a bridge based on the equal shear force between plates and the shear-slip relationship between plates, and the free boundary conditions on the outside of the bridge side plates are added to form an overall equation system to solve the joint shear force. This method not only directly introduces the damage location and damage degree of the hinge joint into the calculation, but also considers the damage evolution of the hinge joint under load, which can provide a quantitative basis for the damage assessment and repair and reinforcement of the hinge joint in hollow slabs.
Description
【Technical field】 [0001] The invention relates to a hinge joint shear force calculation method, in particular to a hollow slab hinge joint shear force calculation method considering hinge joint damage, and belongs to the technical field of bridge engineering. 【Background technique】 [0002] Hollow slab bridges occupy a large proportion of small and medium span bridges in my country because of their simple structure, convenient construction, and mature technology. However, after several years of operation, hollow slab bridges often suffer from hinge joint damage, and they are repeatedly repaired and damaged. The hinge joint is the force transmission part between the hollow slabs. Once damaged or destroyed, the force transmission performance will be weakened or invalid, and the force on the single slab will increase, which will easily cause damage to the hollow slab beam and cause safety accidents. [0003] Hollow slab bridges in my country are usually designed by the hinged ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/12G06F30/13E01D101/24
CPCE01D19/125E01D2101/24G06F30/13
Inventor 倪晓静邢渊邵林海王红良钱一栋张康陈振宇吴金茹石云英赵林燕周杨
Owner HUA HUI ENGINEERING DESIGN GROUP CO LTD