A seismic design method for near-field structures

A technology for regional structure and seismic design, applied in geometric CAD, special data processing applications, CAD numerical modeling, etc., can solve the problem of poor structural safety in near-field areas, and achieve the effect of ensuring safety and ensuring urban earthquake safety.

Active Publication Date: 2022-08-05
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the near-field pulse effect is considered only by modifying the seismic design spectrum, so that the collapse reserve of the near-field area is smaller than that of the far-field area structure, resulting in poor safety of the near-field area structure. A method for seismic design of structures in the near-field region

Method used

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  • A seismic design method for near-field structures
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  • A seismic design method for near-field structures

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specific Embodiment approach 1

[0020] Embodiment 1: Combining figure 1 This embodiment will be described. The seismic design method of a near-field area structure described in this embodiment is specifically implemented through the following steps:

[0021] Step 1: Design the structure model of the near-field region and the structure model of the far-field region;

[0022] The near-field design spectrum is used to design several near-field structural models, and the far-field design spectrum is used to design far-field structural models with the same number of near-field structural models;

[0023] Step 2: Establish the collapse vulnerability curves of the near-field structural model and the far-field structural model;

[0024] According to the response characteristics of the near-field regional structural model under different ground motion intensities, the collapse vulnerability curve of the near-field regional structural model is established. The collapse vulnerability curve of the model;

[0025] St...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, a near-field area structure model and a far-field area structure model are designed, wherein the method for designing the near-field area structure model is: according to Design the 4-layer, 8-layer, and 12-layer RC frame structure under the condition of 7-degree fortification by the near-field design spectrum, and then design the 4-layer, 8-layer, and 12-layer RC frame structure under the 8-degree fortification condition according to the near-field design spectrum;

[0029] The method for designing the structure model of the far-field area is as follows: design the 4-layer, 8-layer, and 12-layer RC frame structures under the condition of 7-degree fortification according to the far-field design spectrum, and then design the 4-layer under the condition of 8-degree fortification according to the far-field design spectrum. Layer, 8-layer, 12-layer RC frame structure;

[0030] The seism...

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the specific process of the second step is:

[0032] By spectral matching, 20 far-field seismic data and 20 near-field pulsed ground motion data were selected respectively, and the incremental dynamic analysis method was used to obtain the response characteristics of the near-field regional structural model and the far-field regional structural model under the action of different ground motion intensities , according to the obtained response characteristics, the collapse vulnerability curves of the near-field region structure model and the far-field region structure model are respectively established.

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Abstract

An anti-seismic design method of a near-field area structure belongs to the field of earthquake engineering. The invention solves the problem that the near-field pulse effect is only considered by correcting the seismic design spectrum, so that the collapse reserve of the near-field area is smaller than that of the far-field area structure, resulting in poor safety of the near-field area structure. The invention is a near-field area structure anti-seismic design method which realizes the collapse reserve equivalent by controlling the basic period of the structure. The method of the invention can ensure the collapse reserve of the structure in the near-field area under the action of the near-field pulse-type ground motion, so that the collapse reserve of the structure in the near-field area is equivalent to the collapse reserve of the structure in the far-field area under the action of the far-field earthquake, thereby ensuring that the near-field area structure is collapsed. The safety of the field area structure is conducive to ensuring the urban earthquake safety in the near field area of ​​my country and promoting the construction of earthquake-resistant cities. The invention can be applied to the field of earthquake engineering.

Description

technical field [0001] The invention belongs to the field of earthquake engineering, and in particular relates to a seismic design method of a near-field area structure. Background technique [0002] It has become a consensus in the field of earthquake engineering that near-field pulsed ground motions are more likely to cause severe damage or even collapse of building structures. There are many earthquake faults in my country, and many cities (such as Beijing, Tianjin, Fuzhou, Chengdu, etc.) are located near the faults. Therefore, whether the near-field pulse effect can be reasonably considered in the seismic design of building structures is very important to ensure the safety of urban earthquakes in my country. [0003] Since the near-field pulse effect is more likely to cause serious damage or even collapse of the structure, the structure in the near-field area should have a collapse reserve no less than that of the structure in the far-field area. The current method only ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F111/10
CPCG06F30/13G06F2111/10
Inventor 温卫平翟长海籍多发刘惠华
Owner HARBIN INST OF TECH
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