Method for enhancing ductility of high-strength concrete pier stud

A technology of high-strength concrete and pier columns, applied in the direction of pier columns, columns, pillars, etc., can solve the problems of complex construction, no explanation, high cost, etc., and achieve the effects of improving seismic performance, saving steel consumption, improving shape and mechanical properties

Inactive Publication Date: 2014-09-17
NANHUA UNIV
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Problems solved by technology

[0013] These methods are complex in construction, high in cost, and some key technologies are immature
my country's "Code for Design of Concrete Structures" and "Code for Seismic Resistance of Building Structures" mention that the method of adding stirrups at the root of the frame column is used to improve the ductility of ordinary concrete columns. However, this method is currently only suitable for ordinary concrete. concrete, unspecified

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  • Method for enhancing ductility of high-strength concrete pier stud
  • Method for enhancing ductility of high-strength concrete pier stud
  • Method for enhancing ductility of high-strength concrete pier stud

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] The present invention combines the characteristics of high-strength steel bars and high-strength concrete, and adopts a new and more reasonable method for improving the ductility of high-strength concrete columns. The hysteretic curve is full and the energy dissipation capacity is strong. The ductility coefficient calculated from the hysteretic curve is shown in the table 1. At the same time, a fitting formula is proposed according to the displacement ductility coefficient and the hoop ratio of high-strength steel bars: figure 1 The specific design parameters of the components in are listed in Table 1

[0038] Table 1 Component design parameters

[0039]

[0040] In Table 1, in addition to the high-strength steel bars, the stirrups of the members are made of grade I steel bars, the longitudinal...

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Abstract

The invention discloses a method for enhancing the ductility of a high-strength concrete pier stud. The method comprises the following steps of 1, determining the ductility requirements, i.e. the displacement ductility factor required to reach, of the high-strength concrete pier stud according to needs; 2, determining the content of high-strength steel bars according to the reinforcement relation between the required displacement ductility factor and the high-strength steel bars of the high-strength concrete pier stud, wherein the strength ratio of high-strength stirrups is 0.90, and the strength ratio of high-strength longitudinal reinforcements is 0.71; 3, determining the grade and the spacing of the high-strength stirrups and the grade and the quantity of the longitudinal reinforcements according to the content of the high-strength steel bars. The method has the characteristics of simpleness, feasibility and low cost, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of buildings and relates to a method for enhancing the ductility of high-strength concrete piers. Background technique [0002] In the existing technology, the basic principle of using high-strength steel bars to improve the seismic performance of high-strength concrete piers is to effectively restrain the core concrete by configuring relatively dense horizontal high-strength stirrups, so that it is in a three-dimensional compression state and maximize the core strength. The strength and deformation capacity of the core concrete; in addition, in addition to the appropriate ordinary steel bars along the longitudinal direction of the column, an appropriate amount of high-strength steel bars is also arranged. Tests show that this method of arranging steel bars will make the whole column in a favorable energy dissipation state, and its ductility can meet the requirements of strong earthquakes. [0003] There ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/00E04C3/34E04B1/98
Inventor 肖潇阎石李朝晖伍琼芳
Owner NANHUA UNIV
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