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).

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.

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.

Nonlinear Dynamic Analysis of the Damping Frame Structure System

2012 ◽  
Vol 594-597 ◽  
pp. 886-890 ◽  
Author(s):  
Gan Hong ◽  
Mei Li ◽  
Yi Zhen Yang
Keyword(s):  
Energy Dissipation ◽  
Seismic Response ◽  
Nonlinear Dynamic ◽  
Time History ◽  
Time History Analysis ◽  
Frame Structure ◽  
Force Model ◽  
Operating Characteristics ◽  
Restoring Force ◽  
History Analysis

Abstract. In the paper, take full account of energy dissipation operating characteristics. Interlayer shear-frame structure for the analysis of the Wilson-Θmethod ELASTOPLASTIC schedule, the design of a nonlinear dynamic time history analysis procedure. On this basis, taking into account the restoring force characteristics of the energy dissipation system, the inflection point in the restoring force model treatment, to avoid a result of the calculation results of distortion due to the iterative error. A frame structure seismic response time history analysis results show that: the framework of the energy dissipation significantly lower than the seismic response of the common framework, and its role in the earthquake when more significant.

Investigation of the restoring force model of through-tenon and half-tenon of timber with a certain level of universality

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5313-5328
Author(s):  
Zhongwei Gao ◽  
Donghui Ma ◽  
Ziyi Wang ◽  
Xiaodong Guo ◽  
Shidong Fang ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Seismic Performance ◽  
Stiffness Degradation ◽  
Coefficient Of Determination ◽  
Percentage Error ◽  
Force Model ◽  
Analysis Model ◽  
Restoring Force ◽  
Element Analysis ◽  
Restoring Force Model

A restoring force model of through-tenon and half-tenon joints was studied with a certain level of universality. To address the differences among data collected under different test conditions, test data collected via through-tenon and half-tenon joints were counted and fitted, and their similarities were then generalized. To better simulate the gap and stiffness degradation between the through-tenon and half-tenon joints, the skeleton curves frameworks were simplified into four phases, namely sliding, elastic, yielding, and failure. The normalized control parameters collected through the characteristics of the framework of through-tenon and half-tenon joints, as well as the different coefficients of strength degradation and stiffness degradation were calculated. The hysteretic rules of the restoring force model of through-tenon and half-tenon joints were developed. Through case study, the results show that the MAPE (mean absolute percentage error) and R2 (coefficient of determination) of experimental data in the references and simulated data of through-tenon are respectively 12.570% and 0.735, while those of half-tenon are respectively 11.763% and 0.772; and the restoring force model of through-tenon and half-tenon joints being constructed had a certain level of universality. The results demonstrated that the construction of refined finite element analysis model of Chinese ancient timber architectures can be simplified to a certain extent to meet the pressing time for seismic performance analysis of many ancient timber architectures. It provides researchers with an innovative pathway to enhance the efficiency of seismic performance analysis of ancient timber architectures.

scholarly journals Influential aspects on seismic performance of confined masonry construction

2013 ◽  
Vol 05 (08) ◽  
pp. 56-62 ◽  
Author(s):  
Ajay Chourasia ◽  
Sriman K. Bhattacharyya ◽  
Pradeep K. Bhargava ◽  
Navratan M. Bhandari
Keyword(s):  
Seismic Performance ◽  
Confined Masonry ◽  
Masonry Construction

Seismic Behavior of Super High-Rise Frame-Core Wall Structure

2012 ◽  
Vol 226-228 ◽  
pp. 967-971
Author(s):  
Ji Xing Yuan ◽  
Qing Zhang
Keyword(s):  
Failure Mode ◽  
Seismic Performance ◽  
Time History ◽  
Frame Structure ◽  
Wall Structure ◽  
Coupling Beams ◽  
High Rise ◽  
Seismic Shear ◽  
Earthquake Force ◽  
Dynamic Time

In this paper a super high-rise frame-core wall as an example, It was analyzed the frame-core wall structure system under action of earthquake force features, set reasonable seismic performance objectives, analysis the structure reasonable failure mode, made it have enough bearing capacity and ductility for a reasonable design of frame and coupling wall-beam, could make the frame-core wall structure with multiple seismic fortification lines, improve the seismic performance of the frame-core wall structure. Finally, the action of earthquake deformation and seismic shear force distribution was analyzed through the elastic dynamic time-history analysis. After a reasonable optimization analysis showed: Frame-core wall structure could have three seismic fortification lines: coupling beams, core wall, frame structure, and had enough energy dissipation ability at the same time, could form the rational failure mode, improved the seismic performance of the structure.

Analysis on Seismic Performance of Corrugated Steel Web Continuous Rigid Frame Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1471-1476
Author(s):  
Yi Qiang Wang ◽  
Bing Bing Fan ◽  
Liang Li
Keyword(s):  
Seismic Performance ◽  
Time History ◽  
Element Analysis ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
History Analysis ◽  
The Finite Element Analysis ◽  
Corrugated Steel Web ◽  
Dynamic Time ◽  
Rigid Frame Bridge

Corrugated steel web continuous rigid frame bridge is a new form of bridge. Using the finite element analysis software Midas Civil to analyze dynamic characteristics of the corrugated steel web continuous rigid frame bridge in a method of subspace iron and the nonlinear dynamic time history analysis method is used to analyze the seismic performance of the bridge, then compared with the ordinary concrete web continuous rigid frame bridge. The results show that the natural frequency of the corrugated steel web continuous rigid frame bridge is smaller than that of the concrete web continuous rigid frame bridge, and the seismic performance of the corrugated steel web continuous rigid frame bridge is superior to that of concrete web continuous rigid frame bridge, the improvement of the seismic performance of piers is most significant.

Parameters Analysis of Re-Centring SMA Damper Based on SAP2000

2012 ◽  
Vol 166-169 ◽  
pp. 219-225 ◽  
Author(s):  
Yu Hong Ling ◽  
Hong Hua Ling
Keyword(s):  
Time History ◽  
Force Model ◽  
Initial Stiffness ◽  
Restoring Force ◽  
Finite Element Software ◽  
History Analysis ◽  
Yield Displacement ◽  
Value Range ◽  
Structural Layer ◽  
Energy Components

According to the working mechanism of re-centring SMA damper, restoring force model is established. Based on the mechanical model, the re-centring SMA damper is modeled in finite element software SAP2000 by adding Multi-Linear element and Plastic (Wen) element. Time-history analysis method under different ground motion is used to analyze control parameters of re-centring SMA damper. The influence on damping effect and ability to re-centring of damper of several factors such as the ratio SR of initial stiffness of energy components and stiffness of corresponding structural layer, the ratio β of yield displacement of energy components and yield displacement of corresponding structural layer, the ratio α of the second stiffness and initial stiffness of energy components, the ratio Q of initial restoring force of re-centring group and yield force of corresponding structural layer, and the ratio λ of the second stiffness and initial stiffness of re-centring group were studied. Their reasonable numerical value range are obtained by numerical calculation, the reasonable ranges for SR, β, α, Q and λ are found to be 2~3, 0~0.05, 0~0.1, 0.05~0.10 and 0.05~0.15 respectively.

scholarly journals Seismic Performance of Clay Bricks Construction

2020 ◽  
Vol 6 (4) ◽  
pp. 785-805
Author(s):  
Jabbar Abdalaali Kadhim ◽  
Abbass Oda Dawood
Keyword(s):  
Seismic Performance ◽  
Numerical Models ◽  
Computer Software ◽  
Time History ◽  
Masonry Walls ◽  
Clay Bricks ◽  
Masonry Construction ◽  
South Of Iraq ◽  
Nonlinear Dynamic Analyses ◽  
Nonlinear Time History

The extensive use of masonry construction accompanied by the seismic hazard in Iraq requires comprehensive studies to assess the seismic performance of such construction. This study aims to evaluate the seismic performance of URM and CM buildings by their nonlinear time-history responses. ANSYS 18.2 software has been used to perform the nonlinear dynamic analyses. The mechanical properties have been investigated as the first step of the study. A simple mechanical instrument was improvised to determine the tensile strength of masonry directly. Ground motions were chosen in a manner so that their peak ground accelerations and site soils are as similar as possible to those in the South of Iraq. The computer software terminated all the analyses before the ends of the applied earthquake duration because of the solutions did not converge. In the numerical models, severe cracks have been observed in both URM and CM models, indicating their unsafe seismic performance. The minor cracks in confining concrete in the CM model compared to the severe ones in the masonry walls of the same model show the capability of the confinement to prevent the disintegration of collapsed masonry walls, at least in damaging cases like the building state at the solution termination.

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