Experimental Study for Seismic Performance of Confined Masonry Structure

2013 ◽  
Vol 353-356 ◽  
pp. 1826-1831
Author(s):  
Tie Jun Qu ◽  
Yan Ping Wang ◽  
Xian Yun Wang
Keyword(s):  
Seismic Performance ◽  
Dynamic Test ◽  
Hysteresis Loops ◽  
Structural Response ◽  
Time History ◽  
Design Code ◽  
Restoring Force ◽  
Static Test ◽  
Confined Masonry ◽  
Made In

A two-story masonry housing model was made in this paper. According to Intensity 7, adjusted Northridge record was selected to be the ground motion input in the pseudo-dynamic test. Pseudo-dynamic test and pseudo-static test were carried out to investigate the seismic behavior of the model structure. The time-history curves of the acceleration, velocity, displacement and restoring force of the structural response were obtained besides the time-history curves of the measuring points of the structure. Also the steel strain of the tie-columns and the hysteresis loops of the structure were obtained. The result shows multi-story confined masonry structures possess superior seismic performance if coordinated with the provision specified in the current compulsory design code and it can continue to use after appropriate dressing under the rarely earthquake.

Seismic Performance Experimental Research of Added Ring-Beams and Tie-Columns Masonry Structure

2013 ◽  
Vol 368-370 ◽  
pp. 1747-1755
Author(s):  
Tie Jun Qu ◽  
Jing Yi Chen ◽  
Xian Yun Wang
Keyword(s):  
Seismic Performance ◽  
Dynamic Test ◽  
Time History ◽  
Masonry Structure ◽  
Displacement Curve ◽  
Restoring Force ◽  
Static Test ◽  
Capacity Limit ◽  
Force Displacement ◽  
Ultimate Limit

To research seismic performance of the strengthened masonry structure, the two stories masonry structure housing model with added ring-beams and tie-columns was designed and made in this paper. By inputting acceleration time-history curve of rarely earthquake of Intensity 7, the seismic response of acceleration, speed, restoring force and displacement of the strengthened masonry structure were obtained through the pseudo-dynamic test when rarely earthquake of Intensity 7 occurred. The reinforcement strain time-history curves of tie-columns root and beam-column junction were tested, then the restoring force-displacement curve of the structure was obtained. By method of pseudo-static test, the strengthened masonry structure of the ultimate limit bearing capacity, limit deformation were obtained, the cracking part and developing process were observed. Finally, comparing the data in this test with that test result of the ring-beams and tie-columns masonry structure designed based on current codes; analyzed seismic performance of the strengthened masonry structure when rarely earthquake of Intensity 7 occurred.

Full-Scale Test on Seismic Performance of Masonry Structure

2012 ◽  
Vol 204-208 ◽  
pp. 2610-2617
Author(s):  
Dong An ◽  
Tie Jun Qu ◽  
Jian Wen Liang
Keyword(s):  
Seismic Performance ◽  
Dynamic Test ◽  
Masonry Structure ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Seismic Action ◽  
Static Test ◽  
Confined Masonry ◽  
Common Structure ◽  
Scale Test

For further study on effective seismic design requirements of masonry structure, two masonry buildings were designed and constructed according to common structure style in towns and villages. Two full-scale buidings were subjected to earthquake using pseudo-dynamic test and quasi-static test. This paper presents crack propagation of masonry structure, hysteretic behavior, deformation and stiffness degradation under horizontal seismic action. In this experiment, deformability and ultimate bearing capacity of confined masonry (CM) with tie-column and ring-beam is higher than common brick structure (BM). Confined masonry (CM) wall maintain integrity due to constraint of tie-column and ring-beam. These tests verify that tie-column and ring-beam system is an effective seismic requirement to enhance seismic performance of masonry structure.

Study on the Seismic Performance of Cavity Walls Constraint Masonry Construction

2013 ◽  
Vol 724-725 ◽  
pp. 1702-1708
Author(s):  
Shu Hong Zuo ◽  
Hong Lu Bai ◽  
Li Hong Xiong ◽  
Ben Yi Liu ◽  
Zhi Min Tian
Keyword(s):  
Seismic Performance ◽  
Time History ◽  
Masonry Structure ◽  
Force Model ◽  
Restoring Force ◽  
Confined Masonry ◽  
Masonry Construction ◽  
State Education ◽  
Cold Area ◽  
Dynamic Time

Cavity walls structure is unsuitable in cold area for its faultiness of poor heat-insulating property. But the cavity walls constraint masonry construction is suitable in cold area for its high heat-insulating property. Studies are carried as setting up the restoring force model of the cavity walls confined masonry structure and analyzing the dynamic time-history of cavity walls constraint masonry structure under 7 degrees small earthquake, middle earthquake or large earthquake through EL centro wave, TALF wave, Ninghe wave and Qian'an wave, which indicates that cavity walls constraint masonry construction can satisfy seismic demand of 7 degree quake. Finally, the formula for calculating the interlayer displacement of cavity walls confined masonry structure near collapse is put forward and the counting result is compared with that of dynamic time-history analyzing, which shows that the accuracy of this formula is high enough to be used for analyzing the seismic performance of cavity walls constraint masonry structure. Foundation projects: Special Basic Scientific Research for Central Public Institute (2008B002, 2010A04), Open Fund of Key Laboratory of State Education Ministroy on Urben and Engineering Safe and Disaster Diminish & Key Laboratory of Beijing on Engineering Seismic and Treatment (EESR2010-07), and High Level Talent Support Project of Heilongjiang University (HDTD2010-13).

Bearing Simulation in Seismic Response Analysis of a Multi-Span Continuous Girder Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1029-1033
Author(s):  
Yong Huang ◽  
Jun Jie Wang ◽  
De Yin Jin
Keyword(s):  
Seismic Performance ◽  
Response Analysis ◽  
Restoring Force ◽  
The Wenchuan Earthquake ◽  
Before And After ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Bearing Damage ◽  
Strong Ground ◽  
Made In

The damage of bearing will change the boundary condition for whole bridge, if we do not take account of bearing failure, the error of structural analysis and the unreasonable in design will be made. In this paper, the effect of possible bearing damage to whole bridge during strong ground motion is studied through examining the seismic performance of a multi-span continuous girder bridge which is a real damaged bridge during the Wenchuan earthquake in 2008. Proper analytical restoring force models of bearings are proposed, which can simulate the seismic performance of the bridge before and after the bearing damage suitably.

Seismic Experimental Study on Masonry Structure Strengthened by Ring-Beam and Constructional Column

2014 ◽  
Vol 1065-1069 ◽  
pp. 1418-1422
Author(s):  
Tie Jun Qu ◽  
Rong Huan Xu
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Dynamic Testing ◽  
Time History ◽  
Masonry Structure ◽  
Displacement Velocity ◽  
Acceleration Response ◽  
Restoring Force ◽  
Earthquake Performance ◽  
Constructional Column

A full scale masonry model of two-floor and single bay was built in this paper and was strengthened by ring-beam and constructional column. And then pseudo-dynamic testing was conducted to study the time-history curves of displacement, velocity, acceleration response and restoring force in 7 degree rarely earthquake. Results show that the earthquake performance is steady and there are no visible cracks on the model after the testing. Windows and doors perform well because of the constraint of ring-beam and column, whereas failures often occurred when the structures were not strengthened. Seismic performance is largely improved by ring-beam and constructional column and the structure can resist 7 degree rarely earthquake.

Residual Drifts of Self-Centering Systems Including Effects of Ambient Building Resistance

2011 ◽  
Vol 27 (3) ◽  
pp. 719-744 ◽  
Author(s):  
Matthew R. Eatherton ◽  
Jerome F. Hajjar
Keyword(s):  
Structural Response ◽  
Time History ◽  
Seismic Energy ◽  
Use Of Self ◽  
Force Component ◽  
Restoring Force ◽  
System Parameters ◽  
Yield Capacity ◽  
Large Earthquakes ◽  
Widespread Interest

There has been widespread interest in the development and use of self-centering (SC) lateral resisting systems that eliminate residual drifts after large earthquakes. SC systems often include a restoring force component and a component that dissipates seismic energy. Typically, it is assumed that the criterion for self-centering is satisfied if the restoring force is proportioned to be greater than the force required to yield the energy dissipating component. A parametric SDOF study was conducted using time-history analyses on several prototype buildings to quantify the effect of varying system parameters on structural response including residual drifts. The ambient resistance of the rest of the building was considered, as well as proportioning the system with less restoring force than the yield capacity of the dissipative component. In addition, the probabilistic mechanism that creates a propensity for reducing residual drifts in systems with little or no restoring force is explored and quantified. It was found that a restoring force that is at least one-half of the force required to yield the dissipative component will still reliably eliminate residual drifts in a non-softening system.

Experimental Research on Restoring Force Characteristics of Light Composite Structure

2011 ◽  
Vol 261-263 ◽  
pp. 130-136
Author(s):  
Sheng Сai Li
Keyword(s):  
Experimental Research ◽  
Composite Structure ◽  
Shear Force ◽  
Dynamic Test ◽  
Model Structure ◽  
Peak Acceleration ◽  
Base Shear ◽  
Restoring Force ◽  
Skeleton Curve ◽  
Static Test

Pseudo dynamic test and pseudo static test were carried out on 1/2 scale model of light composite structure. By experimental research, hysteretic curves of base shear force and top displacement of the model structure were got, which come from various sections of pseudo dynamic test and pseudo static test, and through hysteretic curves of base shear force and top displacement of the model structure, skeleton curve of base shear force and top displacement of the model structure can be got. Outside line of all skeleton curves was skeleton curve of the light composite structure model. By analyzing and simplifying of the skeleton curve, finally restoring force model of the model structure was obtained, so reasonable dynamic analysis method of seismic design of the model structure can be offered. Research shows that as peak acceleration of inputting seismic wave continuously grows, especially when the peak acceleration reaching 800 gal, after the model structure reached plastic stage and in the stage of pseudo static test, the hysteretic curves become fuller and fuller, which shows that, with continuous emerging and propagation of crack, the structural rigidity losses gradually, and its energy dissipation capacity increases gradually. So earthquake fortification level of not collapse when hit by rarely occurred earthquake will achieve.

Experimental Study and Theoretical Analysis on the Seismic Performance of the New Frame-Bent Structure

2011 ◽  
Vol 368-373 ◽  
pp. 104-107
Author(s):  
Long Xing Yin ◽  
Guo Liang Bai ◽  
Hong Xing Li ◽  
Xiao Wen Li
Keyword(s):  
Experimental Study ◽  
Theoretical Analysis ◽  
Seismic Performance ◽  
Thermal Power ◽  
Dynamic Test ◽  
Time History ◽  
Shear Walls ◽  
Scale Model ◽  
Structure System ◽  
History Analysis

In order to solve the problem that traditional main building for large thermal power plant cannot satisfy seismic requirements in high-intensity area, we put forward SRC frame-RC few shear walls structure system to conduct experimental study and theoretical analysis. Based on pseudo-dynamic test of 1/7 scale model and elastic-plastic time history analysis, the deformation property and capacity for dissipation of energy, as well as the failure mechanism are analyzed. The results show that the new structure system has well seismic performance, it can satisfy seismic fortification goals in 8 intensity Ⅱ zones, but the weak positions should be given enough attentions.

scholarly journals The seismic performance of energy absorbing dampers in building structures

1984 ◽  
Vol 17 (1) ◽  
pp. 38-46 ◽  
Author(s):  
D. E. Key
Keyword(s):  
Seismic Performance ◽  
Dynamic Properties ◽  
Structural Response ◽  
Time History ◽  
Shear Walls ◽  
Building Structures ◽  
Floor Level ◽  
Response Characteristics ◽  
History Analysis ◽  
Energy Absorbing

By separating the stiff shear walls of the structural core of a building from the more flexible column/beam/slab structure two independent structures with markedly different dynamic properties are formed. By introducing damping elements between the two, energy is absorbed during earthquakes, giving consider- ably improved response characteristics. A ten storey office structure incorporating dampers in this fashion is studied by time history analysis, using five simulated earthquakes. Dampers are provided at each floor level. The analysis treats the damping as hysteretic, based on the type described by Kelly (1972). Significant reductions in structural response are achieved by this means.

scholarly journals Nonlinear Seismic Performance Evaluation of Flexural Slotted Connection Using Endurance Time Method

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Seyed Mohamad Seyed Kolbadi ◽  
Hosein Piri ◽  
Ali Keyhani ◽  
S.Mahdi Seyed-Kolbadi ◽  
Masoud Mirtaheri
Keyword(s):  
Seismic Performance ◽  
Computational Cost ◽  
Structural Response ◽  
Time History ◽  
Steel Structure ◽  
Response Spectra ◽  
Structure Design ◽  
Time Analysis ◽  
Endurance Time ◽  
Seismic Performance Evaluation

The equivalent statistical methods, spectral analysis, and time history analysis are usually offered in the steel structure design regulations. Among these methods, the third one is more accurate; however, it requires more time to align the accelerometers due to a large number of analyses. In the endurance time (ET) method, incremental acceleration functions gradually and uniformly increases over time while their linear and nonlinear response spectra are proportional to the mean of the real seismic spectrum. These functions are used as input functions to analyze the nonlinear time history of structures, and the performance of structures is evaluated based on the maximum length of time they can meet specified performance goals. A three-story steel bending frame with (slotted web) SW and (web unslotted flange) WUF connection is examined through the performance time method in performance-based design. This article aimed at evaluating the seismic performance of these connections in the bending frame through endurance time analysis to predict the structural response in the probabilistic evaluation of the seismic performance of the structures. It is found that the endurance time analysis is justified with the seismic performance of the connections with low computational cost and proper accuracy. The results of comparing both SW and WUF connections indicated that the SW connection prevents the connection welding area from being failed due to transferring the plastic joint into the beam and in an area away from the column face and causes less damage compared to the WUF connection.

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