Stress calculation method for steel-concrete composite beam

A calculation method and technology of composite beams, applied in the directions of calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as stress changes of main beams of composite beam cable-stayed bridges, inability to effectively analyze sudden changes in shear lag displacement boundary conditions, etc.

Inactive Publication Date: 2019-07-19
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of stress calculation method of steel-concrete composite beam, to alleviate existing in the prior art in the composite beam cable-stayed bridge construction process, utilize existing stress calculation method to be unable to effectively analyze construction process due to The sudden chan...

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stress calculation method for steel-concrete composite beam
  • Stress calculation method for steel-concrete composite beam
  • Stress calculation method for steel-concrete composite beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The stress calculation method for a steel-concrete composite beam provided in this embodiment includes: dividing the composite beam into multiple beam segment units, each beam segment unit including at least two nodes. Obtain all the generalized forces on each node of the beam element, including the axial force and the nodal forces of the two shear lag elements, and form the nodal force matrix of the beam element according to all the generalized force data obtained on each node . Construct the nodal displacement matrix corresponding to the nodal force matrix, and the nodal displacements in the nodal displacement matrix are all unknown quantities. The total potential energy of the beam element is calculated based on the nodal force matrix and the nodal displacement matrix, and the first-order variation is performed on the total potential energy of the beam element to obtain a balance equation including the nodal force matrix and the nodal displacement matrix. The unknow...

Embodiment 2

[0165] In this embodiment, the stress calculation method of the steel-concrete composite beam provided in the first embodiment is applied to the stress calculation process of the composite beam during the construction of the actual composite beam cable-stayed bridge, and then the steel-concrete composite beam provided in the first embodiment is applied The stress calculated by the stress calculation method and the stress calculated by the existing stress calculation method are respectively compared with the actual measured stress of the composite beam. According to the comparison results, it can be found that the stress calculation method of the steel-concrete composite beam provided in Example 1 has smaller error than the existing stress calculation method, and can effectively analyze the shear force caused by the concentrated bending moment and axial force during the construction process The stress change of the main girder of composite girder cable-stayed bridges is caused b...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Tensile strengthaaaaaaaaaa
Nominal diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a stress calculation method for a steel-concrete composite beam, and relates to the field of bridge construction. The method comprises the following steps: dividing a compositebeam into a plurality of beam section units, each beam section unit comprising at least two nodes; obtaining all generalized forces including an axial force and node forces of the two shear hysteresisunits on each node on the beam section unit, and forming a node force matrix; constructing a node displacement matrix corresponding to the node force matrix; obtaining a balance equation comprising the node force matrix and the node displacement matrix based on the node force matrix and the node displacement matrix; obtaining a node displacement matrix with known node displacement based on the balance equation; and calculating the stress of the beam section unit based on the node displacement matrix. The method solves the problem that a stress calculation method in the prior art cannot effectively analyze the stress change of the main beam of the composite beam cable-stayed bridge caused by the sudden change of the shear hysteresis displacement boundary condition, the continuous change ofthe load and the shear hysteresis displacement boundary condition and other factors in the construction process.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a stress calculation method of a steel-concrete composite beam. Background technique [0002] Cable-stayed bridges are mainly divided into concrete cable-stayed bridges, steel cable-stayed bridges, composite girder cable-stayed bridges and composite girder cable-stayed bridges according to the different materials used for the main girder. The composite girder cable-stayed bridge is a bridge form in which the main girder is a steel structure, the bridge deck is a concrete structure, and the main girder and the bridge deck are jointly stressed through shear connectors. bridge" or "composite girder cable-stayed bridge". The advantage of the composite girder cable-stayed bridge is that the steel cable-stayed bridge can make full use of concrete compression, which improves the compressive performance of the main girder near the bridge tower and reduces the large axial for...

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
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23G06F2119/06
Inventor 刘洋周世军高艳芹郑光常鸣
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap