Bearing Capacity Design Method of Prestressed Concrete Structure

A concrete structure and design method technology, applied in truss structures, calculations, special data processing applications, etc., can solve the problems that it is difficult to determine the influence of columns, walls, and tubes on the design and calculation results, and achieve easy mastery and popularization. The calculation method is clear, and the effect of improving the safety of engineering construction and use

Active Publication Date: 2017-10-03
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that it is difficult to determine the influence of the confinement structures such as columns, walls, tubes on the prestressed concrete structure and the influence on the design and calculation results in the existing design method of the statically indeterminate prestressed concrete structure , and propose a bearing capacity design method for prestressed concrete structures

Method used

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  • Bearing Capacity Design Method of Prestressed Concrete Structure
  • Bearing Capacity Design Method of Prestressed Concrete Structure
  • Bearing Capacity Design Method of Prestressed Concrete Structure

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specific Embodiment approach 1

[0039] The bearing capacity design method of the prestressed concrete structure of the present embodiment, the bearing capacity design method of the prestressed concrete structure is realized by the following steps:

[0040] Step 1: Judging the concrete structure, if the concrete structure is determined to be a concrete structure with an infinite side structure, then perform steps 2 to 6, and if the concrete structure is determined to be a concrete structure with a limited side structure, then perform Calculations from Step 2 to Step 7;

[0041] Step 2: Calculate the cross-sectional area A of the longitudinal prestressed tendon in the tension zone p ;

[0042] Step 3: Determine the bending moment value M of the control section under the end preload caused by the tensioned prestressed tendon and the equivalent load in the span p , and determine the design value M of the external load and bending moment of the control section load , so as to calculate the sum of the bending m...

specific Embodiment approach 2

[0067] Different from the specific embodiment one, in the bearing capacity design method of the prestressed concrete structure of the present embodiment, the cross-sectional area A of the longitudinal prestressed tendon in the tension zone described in step two p The specific determination method:

[0068] First, determine the thickness of the prestressed tendon protective layer according to the construction code, and determine the line shape of the prestressed tendon according to the load type;

[0069] Then, the cross-sectional area A of the prestressed tendon is determined by calculating the crack governing equation p1 , and then calculate and determine the cross-sectional area A of the prestressed tendon through the deformation control equation p2 , take the cross-sectional area A of the prestressed tendon p1 and the cross-sectional area A of the prestressing tendons p2 The larger of the two is used as the cross-sectional area A of the prestressed tendon p .

specific Embodiment approach 3

[0070] The difference from the specific embodiment 1 or 2 is that in the design method of the bearing capacity of the prestressed concrete structure in this embodiment, the concrete structure of the limited side structure described in step 7 is a prestressed concrete frame structure, a prestressed concrete slab-column structure, Vertical member of prestressed concrete high-rise structure - one of column, shear wall and cylinder.

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Abstract

Design methods for the bearing capacity of prestressed concrete structures. In the existing design methods of statically indeterminate prestressed concrete structures, it is difficult to determine the influence of the confinement structures such as columns, walls, and tubes on the prestressed concrete structure and the influence on the design calculation results. A bearing capacity design method for prestressed concrete structures, which distinguishes concrete structures with infinite side structures and concrete structures with limited side structures, and introduces the lateral limit influence coefficient; calculates the cross-sectional area of ​​longitudinal prestressed tendons in the tension zone; determines by The sum of the bending moment value caused by tensioning the prestressed tendon and the design value of the external load bending moment of the control section; the establishment of the effective prestress from the tension to the prestressed tendon; the design value of the tensile strength of the prestressed tendon is higher than the effective prestress Provide resistance partially passively; calculate the bearing capacity of the normal section of the rectangular prestressed concrete flexure member in the unconfined structure; introduce the influence coefficient of the confinement for correction, and obtain the normal section load capacity of the rectangular prestressed concrete flexure member in the confined structure Force calculation formula. The invention is applied to the bearing capacity design of the prestressed concrete structure.

Description

technical field [0001] The invention relates to a bearing capacity design method of a prestressed concrete structure. Background technique [0002] Most of the prestressed concrete structures in building construction are statically determinate prestressed concrete structures, and the existing methods for the design of superstatic prestressed concrete structures have introduced the concepts of main internal force, comprehensive internal force and secondary internal force, and there are calculation theories Abstract, not easy for engineers and technicians to grasp. This design method of statically indeterminate prestressed concrete structures based on the working principle of continuous beams is difficult to determine the influence of the confinement structures such as columns, walls, and tubes on the transmission of prestressed concrete structures and the influence of design calculation results on construction projects. cause safety hazards. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06F19/00E04C3/26
Inventor 郑文忠王英周威
Owner HARBIN INST OF TECH
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