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Reinforced Concrete Seismic Isolation Foundation

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

Active Publication Date: 2017-07-14
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 Seismic Isolation Foundation
  • Reinforced Concrete Seismic Isolation Foundation
  • Reinforced Concrete Seismic Isolation Foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: flexible column shock isolation method, such as figure 2 shown. The top of the high-elastic steel bar and the steel cover are fixedly connected by nuts, and a gap of 30-50mm is left between the steel cover and the cup-shaped foundation, and the gap is filled with sealing grease. The load on the upper part of the structure is jointly borne by dozens of highly elastic steel bars, each of which is equivalent to a flexible column, which has certain vertical compression resistance and lateral resilience. The vertical ultimate bearing capacity of a single highly elastic steel bar can be calculated by the Euler formula Sure. The characteristics of this working method are: the vertical bearing capacity is controlled by the stability of the compression bar, the horizontal stiffness is moderate, and the pull-out performance is good.

Embodiment 2

[0043] Embodiment 2: Sliding isolation mode, such as image 3 shown. The top of the high-elastic steel bar passes through the positioning hole of the steel cover plate, and is not fixed with nuts. 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 protruding steel bar head above the steel cover so that the top of the steel bar is flush with the top 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 bars do not bear the vertical force, but only provide horizontal resilience, so that the seismic isolation structure automatically resets. The characteristics of this working method are: high vertical bearing capacity, low horizontal stiffness, no pull-out resistance, and can be used in combination with the working method. When u...

Embodiment 3

[0044] Embodiment three: Combined seismic isolation method, such as Figure 4 shown. Structural side columns and corner columns usually have small vertical loads, and uplift forces may occur during earthquakes. In order to prevent structural overturning, the foundation under the side columns and corner columns adopts a flexible column isolation method, while the vertical load of the center column is relatively large , using the 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 seismic isolation foundation. Background technique [0002] The vibration of building structures under the action of earthquakes is mainly horizontal vibration, followed by vertical vibration, and the seismic damage of structures 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 of the stiffness will make the structure absorb more seismic energy. The building 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, which uses the flexible deformation of the isolation support to prolong the natural vibration period of the structure by setting the isolation sup...

Claims

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Application Information

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Patent Type & Authority Patents(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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