Near-fault seismic acceleration time-history fitting method capable of representing ground permanent displacement

A technology of seismic acceleration and displacement time history, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as finding

Active Publication Date: 2019-10-29
INST OF GEOPHYSICS CHINA EARTHQUAKE ADMINISTRATION
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, it is difficult to find seismic acceleration time history that satisfies multiple objectives at the same time, especially including permanent ground displacem...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Near-fault seismic acceleration time-history fitting method capable of representing ground permanent displacement
  • Near-fault seismic acceleration time-history fitting method capable of representing ground permanent displacement
  • Near-fault seismic acceleration time-history fitting method capable of representing ground permanent displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] For a bridge spanning a fault, the distance between the bridge pier and the fault is about 2 km, and the impact of the near-fault pulse characteristics and permanent displacement of the ground motion input should be considered during design. The research results show that the peak value of the seismic acceleration time history corresponding to the 50-year return period with a probability of 2% is about 0.69g. Considering the impact of the earthquake surface rupture, the one-time sudden displacement value of the bridge is: the vertical dislocation of the upper and lower walls of the fault is 1.4 m, the horizontal distance is 0.8m (calculated according to the inclination angle of 60° left and right), and the right-handed horizontal displacement is <1.4m.

[0090] When fitting the horizontal seismic acceleration time history, the initial ground motion is the acceleration record of the 1992 Lander earthquake measured by the acceleration sensor, the peak value of 0.69g is use...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a near-fault seismic acceleration time-history fitting method capable of representing ground permanent displacement. The method comprises the following steps: forming an initial seismic acceleration time history, carrying out first baseline adjustment on initial seismic oscillation, extracting second baseline correction parameters of the seismic acceleration time history,carrying out multi-target-based seismic acceleration time history adjustment, evaluating target parameters and the like. The near-fault seismic acceleration time history fitting method capable of representing the ground permanent displacement is adopted; the seismic acceleration record obtained by the method can meet the requirements of an acceleration response spectrum and peak acceleration, canreflect the characteristics of near-fault seismic oscillation velocity pulses, can represent the permanent displacement of the ground, and can provide input data of a seismic acceleration travel withextremely high reference during aseismic design.

Description

technical field [0001] The present application relates to a near-fault seismic acceleration time-history fitting method capable of characterizing permanent ground displacement, which is applicable to the technical field of seismic design. Background technique [0002] Permanent ground displacement refers to the ground deformation caused by fault dislocation during an earthquake. Such as figure 1 and 2 The time history of seismic acceleration, velocity and displacement in the east-west direction of Wenchuan seismic station 051PXZ is shown, and the corresponding permanent displacement is about 56cm. Many large earthquake engineering damages in history have shown that the permanent large displacement of the near-field ground is the main reason for the final collapse of buildings or structures. Therefore, long-period In the seismic design of structures, it is necessary to pay attention to the displacement of the seismic input, especially when there is permanent displacement n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01V1/28G01V1/30G01V1/32
CPCG01V1/282G01V1/307G01V1/32
Inventor 俞瑞芳张斌
Owner INST OF GEOPHYSICS CHINA EARTHQUAKE ADMINISTRATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap