A Design Method of Prestressed Steel Tendons in Inclined Web Plates of Curved Girder Bridges
A technology of prestressed steel beams and design methods, applied in bridge construction, bridges, bridge materials, etc., can solve the problems of large errors and low processing precision, achieve the effect of accurate prestress calculation, improve construction precision and construction efficiency
Active Publication Date: 2020-09-01
CHINA MAJOR BRIDGE ENERGINEERING
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The technical problem to be solved by the present invention is that the existing design method of oblique web prestressed steel beam has the problems of large error and low processing accuracy
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
[0022] The present invention provides a method for designing prestressed steel beams of oblique webs of curved girder bridges, which can obtain broken lines close to real steel beam space curves, thereby obtaining more accurate length, elongation and layout of prestressed steel beams Control points and effective prestress, the construction unit can directly arrange beams for construction according to the arrangement of control points, improve construction accuracy and construction efficiency, and at the same time prestress calculation is more accurate. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] Such as figure 1 As shown, the design method of a kind of curved girder bridge oblique web prestressed steel tendon provided by the present invention comprises the following steps:
[0024] Such as figure 1 and image 3 As shown, the prestressed steel tendon is on the spatial curved surface ...
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 discloses a design method for prestressed steel tendons of oblique webs of a curved girder bridge. The method includes the following steps that the prestressed steel tendons on a spatialcurved surface is mapped into two plane curves including a structural line and a steel-tendon vertical bending line; the mapping relationship and the structural line are determined, the steel-tendonvertical bending line is designed, and the steel tendons of the oblique weds on the inner and outer sides adopt the same steel-tendon vertical bending lines; the steel-tendon vertical broken lines areconverted into plane broken lines, a cylindrical-surface broken lines and a conical-surface broken lines. Only by designing the plane broken lines such as the steel-tendon vertical broken lines, thebroken lines close to the real steel-tendon vertical bending lines are obtained through multiple plane-to-space fitting, and thus the length, elongation, layout control points and effective prestressing force of the prestressed steel tendons can be more accurately obtained. Construction units can directly arrange the steel tendons according to the arrangement of control points, the construction accuracy and efficiency are improved, and at the same time, the calculation of prestressing force is more accurate.
Description
technical field [0001] The invention relates to the technical field of prestressed concrete bridges, in particular to a method for designing prestressed steel beams of oblique web plates of curved girder bridges. Background technique [0002] The prestressed steel tendons of the inclined web of the curved girder bridge are on a conical surface. The geometry of these prestressed steel tendons is a complex spatial curve, and it is difficult to find an analytical formula. The length and elongation of the inner and outer web steel tendons It is not the same as placing control points. [0003] At present, the design method of the prestressed steel tendons of the inclined web of the curved girder bridge is to flatten the curved girder bridge into a straight girder, and design the steel tendons of the straight girder bridge. During construction, the length and elongation of the inner and outer steel beams need to be corrected, and there are errors. Since the coordinates of the ac...
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): E01D2/00E01D2/04E01D101/28
CPCE01D2/00E01D2/04E01D2101/28
Inventor 钱淼朱运河陈佳
Owner CHINA MAJOR BRIDGE ENERGINEERING