Design evaluation method of reinforced asphalt seismic isolation pier wall under earthquake

Abstract

The invention discloses an evaluation method for a design of a reinforcing steel bar pitch-made shock-insulating pier wall upon earthquake. First, a displacement of a shock-insulating reinforcing steel bar upon an earthquake with a preset seismic grade is calculated; when the displacement of the shock-insulating reinforcing steel bar is not in accordance with earthquake effect combination checkingcalculation and a horizontal displacement requirement, stress of the shock-insulating pier wall is considered and whether the shock-insulating reinforcing steel bar yields is determined; when the reinforcing steel bar yields and a concrete relative depth (x) of a compressive area satisfies a relationship of x<0.4b and M'D >=MD, the pitch-made shock-insulating pier can be proved to stand the preset seismic grade; and if the reinforcing steel bar is determined not to yield, and the concrete relative depth (x) of the compressive area satisfies a relationship of x<0.4b and M'D >=MD and also shearrigidity is met, the pitch-made shock-insulating pier can stand up to the preset seismic grade. Shock-insulating pier wall and shock-insulating reinforcing steel bar common stress is considered uponshock-insulating reinforcing steel bar yield or excessive horizontal displacement, so material waste of a traditional method can be avoided and waste which is caused when a building meeting a seismicrequirement fails to meet original evaluation demands has to be detached and reconstructed can be avoided.

Description

technical field [0001] The invention relates to the technical field of building structure design, in particular to a design evaluation method for reinforced asphalt seismic isolation pier walls under earthquakes. Background technique [0002] Before building a building, it is usually necessary to carry out seismic design on the seismic isolation pier of the building, and the existing seismic design is as follows: [0003] When the force on the pier wall of the seismic isolation pier is not considered, according to the design method and design requirements in the "Design Code for Seismic Isolation of Reinforced Asphalt Foundations for Multi-storey Buildings", we can determine the following parameters, such as figure 1 and 2 shown. [0004] Where: d is the diameter of the isolation steel bar; [0005] h represents the effective height of the isolation reinforcement; [0006] L represents the distance between the steel bar center of the seismic isolation pier and the inner ...

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Problems solved by technology

[0033] However, the research on the reinforced asphalt seismic isolation layer by the above method is still in the elastic stage, and has not considered the joint stress of the seismic isolation pier wall and the seismic isolation reinforcement when the seismic isolation reinforcement yields or the horizontal displacement is too large. Therefore, in the actual construction of the building At this time, the safety factor of the isolation layer is seriously underestimated, resulting in the selection of more steel bars in structural design. This approach is conservative, uneconomical, and unreasonable.

In addition, in some areas, the anti-seismic level corresponding to certain building requirements will be increased. Through the evaluation by the original method, such buildings may actually meet the anti-seismic requirements. Great waste of social resources

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