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Prestress type steel-concrete structure using performance design method

A technology of concrete structure and design method, which is applied in the direction of structural elements, long-strip structural members for load-bearing, building components, etc., and can solve the problems of ignoring constraints, engineering safety hazards, and the failure of normal performance of prestressed concrete beams to meet structural requirements And other issues

Inactive Publication Date: 2012-10-24
TONGJI UNIV +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a design method for the performance of prestressed steel concrete structures, which solves the problem that the current design method ignores the constraints in the calculation, causing the normal performance of the actual prestressed concrete beams to fail to meet the structural requirements. Defects that bring potential safety hazards to the project

Method used

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  • Prestress type steel-concrete structure using performance design method
  • Prestress type steel-concrete structure using performance design method
  • Prestress type steel-concrete structure using performance design method

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0053] The long-term research of our research group shows that in prestressed steel concrete structures with complex constraints, the effective prestress in prestressed concrete beams is greatly reduced due to the influence of column anti-sway stiffness, so the actual prestressed concrete beams Normal use and ultimate bearing capacity cannot meet the structural requirements, which will cause safety hazards to the project. Therefore, a prestressed steel concrete structure design method based on complex constraints is considered to solve the above two requirements, thereby eliminating potential safety hazards. Moreover, the research group also found that constraints and their distribution are the essence of secondary internal forces, and the distribution of effective stress also has a certain impact on constraints. Therefore, it is scientific and saf...

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Abstract

The present invention relates to a prestress type steel-concrete structure design, and belongs to the field of civil engineering. The prestress type steel-concrete structure using performance design method is characterized by: considering constraint and distribution thereof, wherein the using performance design during structure construction designing comprises calculating deflection of a frame beam under a normal use limit state and carrying out checking computation on a maximum crack width of the frame beam. Considerations of the constraint and the distribution thereof are the entity generated by the internal forces, the constraint causes the influence of the secondary axial force, such that the prestressed frame beam becomes a tension bending member from a flexural member so as to impact deflection and crack width of the prestressed frame beam. With the calculation formula of the design method provided by the present invention, the influence of the secondary axial force is considered, and the prestress type steel-concrete structure design theory is quantitatively established by using a constraint viewpoint.

Description

technical field [0001] The invention relates to the design of a prestressed steel concrete structure, in particular to a design method for the serviceability of the prestressed steel concrete structure. Background technique [0002] The modern prestressed structural system refers to the prestressed structural system built with high-strength and high-performance materials, modern design methods and advanced construction techniques. one. It is widely used in large public buildings, large overhangs, large-span and heavy-duty industrial buildings, high-rise buildings, large and medium-span bridges, large special structures, TV towers, nuclear power plant containment shells, and offshore platforms. Prestressed steel concrete (PSRC) structure, as a new modern prestressed structure, can very effectively adapt to the development trend of modern architecture and meet the needs of modern structures. Applying prestress to the steel concrete beam can expand the elastic range of the ma...

Claims

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Application Information

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IPC IPC(8): G01N3/00E04C3/293
Inventor 熊学玉高峰熊斌李明
Owner TONGJI UNIV
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