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Reinforced concrete vibration-isolated foundation

A reinforced concrete and seismic isolation technology, which is applied in basic structure engineering, construction, etc., can solve the problems of high cost, low damping, and poor self-resetting ability, and achieve the effects of reducing engineering costs, saving structural space, and increasing the natural vibration period

Active Publication Date: 2016-06-08
福建省中禹水利水电工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of rubber isolation bearings such as weak pull-out resistance, poor high-temperature resistance, and high cost, its popularization and application is limited.
The main disadvantages of rolling and sliding isolators are low damping and poor self-resetting ability

Method used

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  • Reinforced concrete vibration-isolated foundation
  • Reinforced concrete vibration-isolated foundation
  • Reinforced concrete vibration-isolated foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Flexible column seismic isolation method, such as figure 2 Shown. The top of the high elastic steel bar and the steel cover plate are fixedly connected by nuts, and a gap of 30-50mm is left between the steel cover plate and the cup-shaped foundation, and the gap is filled with sealing grease. The load on the upper part of the structure is shared by dozens of highly elastic steel bars. Each high elastic steel bar is equivalent to a flexible column with a certain vertical pressure resistance and lateral resilience. The vertical ultimate bearing capacity of a single high elastic steel bar can be obtained by Euler’s formula determine. The characteristics of this working method are: the vertical bearing capacity is controlled by the stability of the compression rod, the horizontal rigidity is moderate, and the pull resistance is good.

Embodiment 2

[0043] Example 2: Sliding vibration isolation method, such as image 3 Shown. The top end of the high-elasticity steel bar passes through the positioning hole of the steel cover plate and does not need to be fixed by a nut. The steel cover plate moves down to contact the top surface of the cup-shaped foundation, and the contact surface is coated with a layer of sealing grease. Saw off the rebar heads above the steel cover so that the top of the rebar is flush with the surface of the steel cover. The load on the upper part of the structure is directly transmitted to the top surface of the cup-shaped foundation by the steel cover plate. The high elastic steel bar does not bear the vertical force, but only provides the horizontal resilience to make the seismic isolation structure automatically reset. The characteristics of this working method are: high vertical bearing capacity, low horizontal rigidity, and no pull resistance. It can be used in combination with the working method....

Embodiment 3

[0044] Embodiment 3: Combined seismic isolation method, such as Figure 4 Shown. The side columns and corner columns of the structure usually have small vertical loads, and uplift forces may occur in earthquakes. In order to prevent the structure from overturning, the foundations under the side columns and corner columns are isolated by flexible columns, while the vertical load of the center column is larger. , Adopt sliding isolation method.

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Abstract

The invention relates to a reinforced concrete vibration-isolated foundation. The reinforced concrete vibration-isolated foundation comprises a ring-shaped foundation, high-elasticity reinforcing steel bars, a cup-mouth steel plate, anchoring pins, a steel cover plate, a limiting baffle bar, sealing grease, buffer cushions, a damping filling material, positioning holes, nuts, injection holes and column joint bars, wherein the ring-shaped cavity of the foundation is filled with the damping filling material to achieve the energy-dissipating damping effect. According to the reinforced concrete vibration-isolated foundation, the foundation in the conventional vibration-isolated foundation and a vibration-isolated supporting base are integrated to achieve the dual functions of foundation stress and vibration isolation, so that relatively great uplift force can be borne; the reinforced concrete vibration-isolated foundation has capacity of damping energy dissipation, can be limited and automatically returned, can obtain required horizontal stiffness by adopting different working modes, and can realize the vibration-isolating effect without mounting the vibration-isolated supporting base, so that the engineering cost can be reduced, and the building space can be saved.

Description

Technical field [0001] The invention relates to a reinforced concrete vibration isolation foundation. Background technique [0002] The vibration of a building structure under the action of an earthquake is mainly horizontal vibration, followed by vertical vibration. The seismic damage of the structure is also mainly caused by horizontal earthquakes. The traditional anti-seismic method is to reduce the damage of the structure by increasing the lateral stiffness and strength of the structure, but the increase in stiffness will make the structure absorb more seismic energy. The building seismic isolation and energy dissipation technologies developed in recent decades have been widely used and have shown many advantages in reducing earthquake damage. [0003] At present, the most widely used building isolation technology is base isolation. It uses the flexible deformation of the base and the upper structure to extend the natural vibration period of the structure and consumes the eart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/34
CPCE02D27/34
Inventor 黄昆
Owner 福建省中禹水利水电工程有限公司
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