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.

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.

Analysis of the Reinforced Masonry on Displacement Response

2013 ◽  
Vol 405-408 ◽  
pp. 2030-2033
Author(s):  
Yang Yu ◽  
Xin Jun Zhuang ◽  
Yun Feng Zhang ◽  
Jie Dong Zhang
Keyword(s):  
Numerical Analysis ◽  
Seismic Performance ◽  
Masonry Structure ◽  
Analysis Method ◽  
Structure System ◽  
Numerical Analysis Method ◽  
Displacement Response ◽  
Reinforced Masonry

It is very important to develop reinforced block masonry structure system with a good anti-seismic performance and convenient construction. This paper mainly researched the displacement response of the reinforced masonry structure under earthquake. The maximum storey drift and displacement of the structure are calculated in Y direction by numerical analysis method.

Isolation design and numerical calculation of isolated rubber bearing in continuous beam bridge in high seismic intensity area

2021 ◽  
pp. 1-14
Author(s):  
Deng Pan ◽  
Tao Zhang
Keyword(s):  
Numerical Calculation ◽  
Seismic Performance ◽  
Seismic Waves ◽  
Seismic Intensity ◽  
Earthquake Hazards ◽  
Seismic Capacity ◽  
Maximum Displacement ◽  
Rubber Bearing ◽  
The Face ◽  
Rubber Bearings

The stability of bridges in the face of earthquake hazards has always been the focus of construction engineering. At present, a large number of bridge construction has begun to use isolation rubber bearings to increase the seismic capacity of bridges. However, in the face of high-intensity earthquake disasters, the seismic performance of the bridge is gradually unable to meet, the main reason is the lack of relevant research on the seismic performance of the bridge in high seismic intensity area. Therefore, this study will explore the changes of the bridge in the face of high-strength earthquake, and try to use high damping rubber bearings for the isolation design of the bridge. By establishing the finite element model of continuous bridge combined with isolation rubber bearing, the numerical calculation of bridge element is carried out on this basis, and the isolation effect of isolation rubber bearing is analyzed. The results show that the compression resistance and shear resistance of the isolated rubber bearing are strong. Under the influence of different seismic waves, the maximum displacement of the bearing is 0.131 m and the maximum horizontal force is 389.6 kN, which are lower than the allowable value of the bridge, and the overall seismic performance of the bridge has been significantly improved, which can play a good theoretical support in the construction of continuous bridges in high seismic intensity areas.

Seismic Capacity Evaluation of Masonry Structures of Primary School Buildings

2011 ◽  
Vol 255-260 ◽  
pp. 2637-2642
Author(s):  
Bo Cao ◽  
Yu Bai ◽  
Wen Pan ◽  
Jian Rong Yang
Keyword(s):  
Statistical Analysis ◽  
Secondary School ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
School Buildings ◽  
Masonry Structures ◽  
Seismic Capacity ◽  
Structure Building ◽  
Capacity Evaluation ◽  
Primary And Secondary School

Taking primary and secondary school buildings of Kunming seismic capacity evaluation results as the research object, both for the identification of the masonry structure building appraisal result of statistical analysis, the assessment that is seismic resistance condition of such housing is given in this paper. Through analyzing and summarizing the structure performance problems of the buildings, the evaluation and reinforcement work for this type of structure can be provided in the future.

Seismic Analysis of a Masonry Structure Retrofitting

2013 ◽  
Vol 671-674 ◽  
pp. 1423-1428
Author(s):  
Jing Hai Yu ◽  
Shan Shan Zhao ◽  
Ning Ning Yu
Keyword(s):  
Seismic Design ◽  
Seismic Analysis ◽  
Masonry Structure ◽  
Seismic Resistance ◽  
Seismic Capacity ◽  
Seismic Code ◽  
Before And After

According to the current seismic code, we model one project in PKPM, analysis the seismic resistance of the masonry structure with rigidity and flexibility floor, and study the earthquake shear and seismic capacity compared before and after such structural load changes and retrofitting. And the analysis conclusion can provide the reference of seismic design of such structures.

Comparative Analysis of the Reinforced Masonry Structure Bearing Capacity with Different Methods

2013 ◽  
Vol 790 ◽  
pp. 112-115
Author(s):  
Yang Yu ◽  
Lei Wang ◽  
Yun Feng Zhang ◽  
Zhao Qing Yuan
Keyword(s):  
Comparative Analysis ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Masonry Structure ◽  
Simple Construction ◽  
Reinforced Masonry

At present, the reinforced masonry structure has been widely concerned. The development of the reinforced masonry structure with a good seismic performance and simple construction is very important. This paper mainly studies on the bearing capacity of the ten storey reinforced masonry structure under the action of earthquakes with three different methods, and given the corresponding data.

Study on the Seismic Performance of Rural Buildings in Beijing Area

2013 ◽  
Vol 353-356 ◽  
pp. 2397-2401
Author(s):  
Cheng Bin Liu ◽  
Ya Ling Ou ◽  
Xing Chen Dong ◽  
Yi Kui Zhang ◽  
Xiang Xiang Zhang ◽  
...  
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Rural Areas ◽  
Masonry Structure ◽  
Earthquake Damage ◽  
Masonry Structures ◽  
Seismic Capacity ◽  
Beijing Area ◽  
Rural Buildings ◽  
The Subject

Wenchuan earthquake caused huge losses in rural areas. The subject briefly introduced the earthquake damage characteristics of masonry structures, analyzed the earthquake damage reasons. The main purpose is to propose some measures to improve the seismic capacity of rural buildings in Beijing area. Through two seismic fortification measures, can effectively enhance the integrity of the masonry structure, reduce the seismic response, effectively improve the seismic capacity of the structure.

Study on Application of Mortar Splint in the Reinforced Masonry Structure

2011 ◽  
Vol 250-253 ◽  
pp. 1183-1186
Author(s):  
Zheng Jun Liao ◽  
Chao He Chen
Keyword(s):  
Masonry Structure ◽  
Seismic Capacity ◽  
Reinforcement Scheme ◽  
Reinforced Masonry ◽  
Before And After

The paper probes into the application of masonry strengthening with mortar splint in the reinforced masonry structure. By optimizing the reinforcement scheme, computing and comparing the indexes of the compound seismic capacity of the building before and after it is strengthened, it can be concluded that the method of masonry strengthening with mortar splint can greatly improve the compound seismic capacity of buildings and achieve the goal of building’s strengthening.

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.

SEISMIC CAPACITY OF MEDIUM SIZE CONTINUOUS BRIDGES WITH LEAD-RUBBER BEARINGS

2019 ◽  
Vol 3 (Special Issue on First SACEE'19) ◽  
pp. 199-206
Author(s):  
Bertha Olmos ◽  
José Jara ◽  
José Luis Fabián
Keyword(s):  
Seismic Performance ◽  
Seismic Vulnerability ◽  
Base Isolation ◽  
Elastic Behaviour ◽  
Medium Size ◽  
Nonlinear Behaviour ◽  
Seismic Capacity ◽  
Damage Scenarios ◽  
Isolation Systems ◽  
Rubber Bearings

This paper investigates the effects of the nonlinear behaviour of isolation pads on the seismic capacity of bridges to identify the parameters of base isolation systems that can be used to improve seismic performance of bridges. A parametric study was conducted by designing a set of bridges for three different soil types and varying the number of spans, span lengths, and pier heights. The seismic responses (acceleration, displacement and pier seismic forces) were evaluated for two structural models. The first model corresponded to the bridges supported on elastomeric bearings with linear elastic behaviour and the second model simulated a base isolated bridge that accounts for the nonlinear behaviour of the system. The seismic demand was represented with a group of twelve real accelerograms recorded on the subduction zone on the Pacific Coast of Mexico. The nonlinear responses under different damage scenarios for the bridges included in the presented study were estimated. These results allow determining the seismic capacity of the bridges with and without base isolation. Results show clearly the importance of considering the nonlinear behaviour on the seismic performance of bridges and the influence of base isolation on the seismic vulnerability of medium size bridges.

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