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.

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.

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).

Experimental Study on Seismic Performance of Composite Reinforced Concrete Block Masnory

2011 ◽  
Vol 243-249 ◽  
pp. 630-635
Author(s):  
Ying Jie Zhu ◽  
Lan Li ◽  
Wen Hui Yang
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Seismic Performance ◽  
Failure Process ◽  
Concrete Block ◽  
Width Ratio ◽  
Steel Bar ◽  
Core Column ◽  
Constructional Column ◽  
Hysteresis Characteristics

Seismic performance under low cyclic experimental study on the six of constructional column- core column composite reinforcement concrete block masnory wall is preasented in this paper, considering the height-width ratio, window hole and without window hole, the setting of the horizontal reinforcing steel bar in the walls. Failure process and failure pattern, hysteresis characteristics, bearing capacity, ductility, skeleton curves, the viscous damping coefficient, stiffness and steel strain change the properties are analyzed, respectivily. Test results shown that this kind of composite reinforced concrete block masnory system has better seismic performance.

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.

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 Experimental Study on Seismic Performance of Old Masonry Walls

2020 ◽  
Vol 20 (6) ◽  
pp. 151-157
Author(s):  
Hoijin Kim ◽  
Zheongzun Yi ◽  
Jongsup Park ◽  
Junsuk Kang
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Initial Crack ◽  
Masonry Wall ◽  
Masonry Structure ◽  
Risk Level ◽  
Control Group ◽  
Masonry Walls ◽  
Masonry Building ◽  
Expected Increase

Due to the increase in the frequency and intensity of earthquakes and the number of old buildings and in Korea, there is an expected increase in the damage to life and property. Therefore, we intend to derive an indicator to evaluate the risk level by conducting a seismic test on old buildings. An initial crack was generated in the masonry structure to reflect the deterioration. The effect of the deterioration on the building was subsequently analyzed by comparing it with the uncracked control group. As a result, the masonry wall, which was the specimen, satisfied the seismic performance, but local failure occurred along the initial crack in the specimen considering the aging. The safety was significantly decreased due to the occurrence of additional cracks. This demonstrates that the cracks caused by the aging of the masonry building greatly damaged the seismic performance of the building.

Experimental Study on Improving Seismic Performance of Load-Bearing Masonry Walls Made of Autoclaved Aerated Concrete

2013 ◽  
Vol 671-674 ◽  
pp. 661-667
Author(s):  
Jing Hai Yu ◽  
Jian Feng Cao ◽  
Tian Hui Fei
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Engineering Practice ◽  
Masonry Walls ◽  
Load Bearing ◽  
Displacement Ductility ◽  
Block Wall ◽  
Aerated Concrete ◽  
Constructional Column ◽  
Reversed Cyclic

Experiments of a piece of comparable block wall and five pieces of block walls with different constructional type subjected to low reversed cyclic loading have been conducted. Investigation has been made on the failure pattern, hysteretic loop curves, displacement-restoring capacity and displacement ductility of walls. The experimental results revealed that the seismic performance of block masonry walls, which used the constructional column and concrete strips, was improved remarkably. It set a sound basis for further analysis research and engineering practice on AAC load-bearing walls in the future.

An Experimental Study on Seismic Performance of Reinforced Masonry Structure with Small-Sized Concrete Hollow Blocks

2010 ◽  
Vol 163-167 ◽  
pp. 4008-4013
Author(s):  
Hai Biao Wang ◽  
Xun Guo ◽  
Bao Kuan Li ◽  
Hai Xu Yang
Keyword(s):  
Seismic Performance ◽  
Structural Model ◽  
Seismic Intensity ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
Seismic Capacity ◽  
Earthquake Intensity ◽  
Reinforced Masonry ◽  
Displacement Angle ◽  
Constructional Column

This paper focuses on the analysis of dynamic characteristics of structural systems, maximum response of acceleration and maximum inter-story displacement angle etc. so as to study the seismic performance, yielding mechanism and seismic resistance capacity of the structure under the circumstance of constructional measures of seismic intensity VII through an earthquake shake table test on a model of a six-story reinforced masonry structure with small-sized concrete hollow blocks. In view of the whole test process, the integral deformation of the reinforced masonry structural model under the influence of seismic vibration is predominantly bending deformation. While inputting different earthquake intensity, the transverse peak average of maximum input acceleration that can be sustained by the structure is lower than that of the vertical peak average. Meanwhile, transverse deformation is more severe than vertical deformation, indicating that vertical seismic resistance capacity is stronger than transverse seismic capacity. The test result shows that the effect of the constraint system consisted of ring beam, constructional column as well as horizontal tie reinforcement is quite obvious, the structure possesses comparatively strong resistance of failure under the influence of moderate and strong earthquakes, which can completely meet the requirement specified in the Seismic Codes, that is, standing erectly when it is subjected to great earthquakes in the area of seismic intensity VII. When the structure is subjected to rare earthquakes, it also possesses considerable seismic resistance capacity.

Research on the Seismic Performance of Construction Waste Recycled Brick Masonry Structure

2012 ◽  
Vol 588-589 ◽  
pp. 1950-1954
Author(s):  
Hui Su ◽  
Guo Song Han ◽  
Xin Pei Jiang
Keyword(s):  
Seismic Performance ◽  
Building Material ◽  
Masonry Structure ◽  
Shaking Table ◽  
Masonry Building ◽  
Test Results ◽  
Acceleration Response ◽  
Construction Waste ◽  
Building Model ◽  
Seismic Property

In order to research the seismic property of masonry building constructed with the construction waste recycled bricks, a four stories building model with 1:3 scale is constructed and tested on the shaking table. Based on the test results, the cracks pattern, displacement response, acceleration response of the building are studied. The failure mechanism of the infill building is investigated. The results show that the construction waste recycled brick is a qualified building material to construct the low rise building.

scholarly journals Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Jin-Ben Gu ◽  
Yi Tao ◽  
Ren Xin ◽  
Z. Yang ◽  
Qing-Xuan Shi
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Masonry Wall ◽  
Masonry Structure ◽  
Shear Capacity ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Frp Composites ◽  
Energy Dissipation Capacity

FRP composites have been used for strengthening RC and masonry structures for decades. However, the researches on repairing multistorey masonry structures using FRP grids were relative less. In the present paper, an experimental study on the seismic performance of multistorey masonry structure with openings repaired with CFRP grid is introduced. Specifically, a 1/3-scale three-floor masonry wall with window openings was tested under quasistatic action to simulate the seismic damages. The damaged masonry wall was then repaired by externally bonding CFRP grids to the areas where the cracks intensively occurred. The repaired masonry wall was retested under the same loading to investigate the seismic resistance and assess the recovery attributed from the CFRP grid repairing. The findings of this study showed that CFRP grid repairing could effectively postpone or even prevent the occurrence and development of cracking. The seismic resistance of the masonry, including shear capacity, energy dissipation capacity, deformability, stiffness degradation, and ductility, was restored. The application of CFRP grid may shift the failure mechanism of the multistorey masonry wall. The recommendation of repair scheme for the similar structures was also proposed in accordance with the findings of the present work.

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