Transverse Seismic Performance Index System of Urban Mass Transit Underground Structures

2015 ◽  
Vol 744-746 ◽  
pp. 924-931
Author(s):  
Zheng Fang Dong ◽  
Feng Li Li ◽  
Qing Mei Kong
Keyword(s):  
Seismic Performance ◽  
Performance Index ◽  
Index System ◽  
Deformation Rate ◽  
Mass Transit ◽  
Underground Structures ◽  
Drift Angle ◽  
Intensity Index ◽  
Story Drift ◽  
Urban Mass Transit

The transverse seismic performance index system of urban mass transit underground structures was presented, which included both intensity index of component and overall deformation index, in order to reasonably evaluate its damage degree under seismic excitations. Intensity index of component had two grades and limit values of two levels ware provided. Overall deformation index included story drift angle for rectangular underground structures and diameter deformation rate for shield tunnels. Performance index values of urban mass transit rectangular underground structure story drift angle ware put forward by reference to modified performance index values of ground structure story drift angle, which was based on a statistical analysis for experiment data of forty-six groups concrete-filled steel tubular frames and one hundred forty-five groups steel-reinforced concrete frames and took into account similarities and differences between surface structures and underground structures. Based on relation between tunnel diameter deformation and stress state of tunnel concrete and bolts, the diameter deformation rate was derived from the analytical solution using compatibility of deformation for a segment cross section. And the diameter deformation rate was also computed by means of incremental dynamic analysis method for different sites under various earthquakes. It is found in the study that based on two performance levels, limiting value of diameter deformation rate is obtained.

Study on Performance-Based Seismic Performance Method for Masonry-Infilled Frame Structures

2013 ◽  
Vol 671-674 ◽  
pp. 1458-1461
Author(s):  
Qiu Wei Wang ◽  
Qing Xuan Shi ◽  
Zhao Hui Han
Keyword(s):  
Seismic Performance ◽  
Performance Index ◽  
Frame Structures ◽  
Severe Damage ◽  
Limit States ◽  
Infilled Frame ◽  
Equivalent Strut ◽  
Capacity Spectrum ◽  
Story Drift ◽  
Infilled Frame Structures

Combining with performance grades of reinforced concrete structures at home and abroad, the seismic performance of masonry-infilled frame structures can be induced into five levels: basically normal, slight damage, medium damage, severe damage and collapse prevention. The limit states of all seismic performance levels and their dominating parameters of masonry-infilled frame structures are put forward, and quantified performance index of this structure are obtained on the basis of statistical test data. The seismic response of pure and masonry-infilled frame structures are compared by using capacity spectrum method and equivalent strut model, and the result indicates that the structure could meet predetermined performance objective under the minor and major earthquake levels by comparing the practical story drift and proposed performance index.

Statistical Analyses of Steel Frame Structure Drift Angle

2012 ◽  
Vol 204-208 ◽  
pp. 1102-1108
Author(s):  
Huan Huan Xia ◽  
Wen Feng Liu ◽  
Yan Qiang Gao
Keyword(s):  
Seismic Performance ◽  
Test Data ◽  
Steel Frame ◽  
Statistical Analyses ◽  
Frame Structure ◽  
Limit Values ◽  
Drift Angle ◽  
Performance Levels ◽  
Story Drift ◽  
Steel Frame Structure

Story drift angle is one of the main indexes to test the seismic performance of building structures. American seismic code of buildings FEMA273/274 respectively provide the limit values of story drift angle in two kinds structural systems, steel frame and steel-support frame. This article collects 40 groups steel frame test data and 24 groups steel-support frame test data. By the statistical analyses of story drift angle and the comparison to the drift angle limit values in different countries, the seismic performance levels of steel frame structure are divided into six,Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴand Ⅵ, and the suggested limit values of story drift angle corresponding with performance levels are given.

The Effect of Damping on Seismic Performance of Steel Frame

2014 ◽  
Vol 580-583 ◽  
pp. 1477-1480
Author(s):  
Xin Wu Wang ◽  
Chang Jiao Hu
Keyword(s):  
Seismic Performance ◽  
Frame Analysis ◽  
Dynamic Test ◽  
Steel Frame ◽  
Structural Damping ◽  
Panel Zone ◽  
Story Drift

To study the effect of damping on seismic performance of steel frame, using the pseudo dynamic test by inputting damping and no damping to analyze the seismic performance of semi-rigid steel frame. Analysis was focused on the effect of damping on the panel zone strain, story drift and interlayer force.The conclusion was that under the more severe earthquake, the structural damping had effects on the seismic performance of semi-rigid steel frame.

scholarly journals Estimation Method of Maximum Inter-Story Drift Angle of Wood-Frame House using Two Accelerometers

2021 ◽  
Keyword(s):  
Health Monitoring ◽  
Main Shock ◽  
Integration Method ◽  
Damage Index ◽  
Estimation Method ◽  
High Accuracy ◽  
2016 Kumamoto Earthquake ◽  
Drift Angle ◽  
Story Drift ◽  
Wood Frame

Abstract. In April 2016, Kumamoto earthquake occurred in Japan and many wooden houses collapsed and many lives were lost because of the second and larger main shock. As a result, the need for Structural Health Monitoring (SHM) for wooden houses is receiving increased attention. In the SHM system, maximum inter-story drift angle is considered as the damage index. We assume that the first story of a wooden house will be damaged so that we need only to focus on the response of this first story. Hence, we install accelerometers on the ground floor and the second floor. In order to estimate the inter-story drift angle, we need to integrate the acceleration records twice. The simple double integration will result in erroneous results. Thus, in this paper, we propose the most appropriate integration method to estimate the maximum story drift angle with high accuracy using two accelerometers.

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