Unlock instant, AI-driven research and patent intelligence for your innovation.

Analytical method for seismic response of general plane irregular buildings considering ssi

An analytical method, irregular technology, applied in special data processing applications, instruments, electrical digital data processing, etc., which can solve problems such as the misalignment of the stiffness center and the geometric center

Inactive Publication Date: 2016-03-30
SHANGHAI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the center of mass, center of stiffness and geometric center of the actual structure are often not coincident, and the structure will produce a ground vibration response coupled with torsion

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
  • Analytical method for seismic response of general plane irregular buildings considering ssi
  • Analytical method for seismic response of general plane irregular buildings considering ssi
  • Analytical method for seismic response of general plane irregular buildings considering ssi

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This analysis method considering the seismic response of SSI general planar irregular buildings is characterized in that the operation steps are as follows:

[0051] 1) The polar coordinates are used to represent the mass eccentricity of each layer of the structure, and the dynamic equation of the mass eccentric structure under bidirectional earthquake action is established;

[0052] 2) In the frequency domain, the five-degree-of-freedom impedance function is used to characterize the soil-structure interaction (SSI), and the general motion equation of the general mass eccentric structure considering the SSI effect under bidirectional earthquake action is established;

[0053] 3) Select the structural model, determine the model parameters of soil and structure, characterize the SSI with the impedance function of five degrees of freedom, combine the dynamic equation of the upper structure, and establish the total motion equation;

[0054] 4) Based on the power spectrum un...

Embodiment 2

[0057] This embodiment is basically the same as Embodiment 1, and is characterized by the steps 1) and 2).

[0058] 1. The method of expressing the mass eccentricity of each layer of the structure in the form of polar coordinates is: when the displacement of the geometric center of the structure in the X direction is u i , Y direction displacement is v i and a torsional displacement of θ i When , the polar coordinate expressions of the mass center X direction, Y direction and torsional displacement are:

[0059] u ie = u i -R i θ i · sinφ i (1)

[0060] v ie =v i +R i θ i ·cosφ i (2)

[0061] θ ie = θ i (3)

[0062] In the formula, R i is the radial coordinate of the center of mass, φ i is the angular coordinate of the center of mass;

[0063] 2. In the frequency domain, the impedance function of five degrees of freedom is used to characterize the soil-structure interaction (SSI), and the total motion equation of the general mass eccentric structure consider...

Embodiment 3

[0072] see figure 1 , figure 2 and image 3 , the steps of the analysis method considering the seismic response of SSI general planar irregular buildings are as follows:

[0073] In the first step, the polar coordinates are used to represent the eccentric position of the structural mass, and the dynamic equation of the general mass eccentric structure under bidirectional earthquake action is established. The equation is shown in equation (5).

[0074] In the second step, the impedance function of five degrees of freedom is used to characterize the soil-structure interaction (SSI), and the general motion equation of the general mass eccentric structure considering the SSI effect under bidirectional earthquake action is established. The equation is shown in equation (9).

[0075] In the third step, take a two-story frame structure as a calculation example, and the structural parameters are shown in the table below. The length and width of the upper structure are both 18m, an...

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 discloses an analytic method of irregular building seismic response considering an SSI (soil-structure interaction) general plane, comprising the operating steps of: firstly, representing mass eccentricity of each layer of a structure by using a polar coordinate and constructing a mass eccentricity structure dynamic equation under a bi-directional seismic action; secondly, representing SSI with five-DOF (degree of freedom) impedance function; thirdly, selecting a structural model, determining model parameters of soil and structure and constructing a general dynamic equation considering SSI general mass eccentricity structure; and fourthly, performing translation-torsion coupling response analysis to the general mass eccentricity structure in a frequency domain based on unitization of an intensity factor of an earthquake spectra. According to the method, influences of coaxial mass eccentricity and non-coaxial mass eccentricity to translation-torsion response of the structure in the case of general mass eccentricity are respectively analyzed, and an arithmetic mean square root of plane central displacement and acceleration of each layer of the structure is calculated and obtained. The method is characterized in that the polar coordinate is employed to represent the non-coaxial eccentricity of the structure. The method has the advantages that the eccentric position of the structure can be flexibly set; and the influence of the non-coaxial eccentricity to the seismic response of the structure is given.

Description

technical field [0001] The invention relates to a method for analyzing the earthquake response of a building engineering structure, in particular to an analysis method for considering the earth-structure interaction (Soil-Structure Interaction, SSI) general planar irregular building earthquake response. Background technique [0002] With the development of social economy and the improvement of urbanization, the urban population has increased dramatically. In order to meet the needs of social development, human beings began to develop underground and in the air. While the building is developing into the air, it presents a unique complex shape in front of the world. In order to reflect the imaginative talent of their designs as much as possible and reflect the characteristics and individuality of the building, various buildings and structures of strange shapes have been continuously and rapidly developed. This causes the center of mass of the building structure to not coinci...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李春祥甘志兴
Owner SHANGHAI UNIV