scholarly journals Mechanical Performance of Confined Autoclaved Fly-Ash-Brick Masonry Walls under Cyclic Loading

2021 ◽  
Vol 11 (22) ◽  
pp. 10560
Author(s):  
Bo Wen ◽  
Lu Zhang ◽  
Ditao Niu ◽  
Guanyi Gao ◽  
Yongkang Kang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Mechanical Performance ◽  
Brick Masonry ◽  
Masonry Walls ◽  
Brick Wall ◽  
Loading Test ◽  
Short Columns ◽  
Constitutive Parameters

In order to solve the limitations of masonry structures, such as poor seismic performance, complicated construction techniques, and energy wastage of wall materials, a new type of confined autoclaved fly-ash-brick wall was proposed and its mechanical performance was analyzed. An axial compression test of autoclaved fly-ash-brick short columns was carried out to analyze the failure mode and obtain the constitutive parameters of the brick. Meanwhile, a low-cyclic loading test of an assembly using an autoclaved fly-ash-brick wall was carried out to prove the correctness of the numerical model. Under multiple influencing parameters, the seismic performance of the assembly of autoclaved fly-ash-brick walls was analyzed by a numerical-simulation method. The results show that (1) the seismic performance of the assembled autoclaved fly-ash-brick walls is better than that of cast-in-place masonry walls; (2) low-strength mortar leads to premature cracking, which is unfavorable to earthquake resistance of the walls; and (3) the bearing capacity of the wall is increased and then decreased with the increase of the vertical compressive stress, so the number of layers of brick masonry structural should be limited. In addition, some construction measures were proposed to improve the mechanical performance of assembled autoclaved fly-ash-brick walls.

Experimental test for mechanical properties of new tenon composite wall using thermal self-insulation block

2020 ◽  
Vol 24 (1) ◽  
pp. 79-89
Author(s):  
Dongyue Wu ◽  
Hui Su ◽  
Shilin Wang ◽  
Wei Chen
Keyword(s):  
Cyclic Loading ◽  
Seismic Performance ◽  
Thermal Insulation ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Mechanical Parameters ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Low Cyclic Loading ◽  
Force Displacement

Concrete hollow blocks have the advantages of simplified construction, reduced construction time, and better thermal performance, and can thereby achieve energy conservation in building engineering and significantly improved thermal and mechanical performance. A new tenon composite block is presented to achieve better self-thermal insulation and mechanical performance by integrating thermal materials into blocks. The tenon composite block application requires satisfying mechanical and seismic performance. Therefore, to prove the mechanical and seismic performance of the tenon composite block, a low cyclic loading test was performed on two self-thermal insulation wall specimens: the tenon composite block and the “Martha” block (used as the comparison specimen). The crack distributions, failure modes, force–displacement data expressed using hysteresis and skeleton curves, mechanical parameters of strengths, displacements, ductility coefficients, stiffness degradations, and equivalent viscous damping coefficients of the two specimens were analyzed in the low cyclic loading test. By analyzing the specimen crack distributions and failure modes, the tenon composite block was proven capable of effectively connecting the heat insulation and loading bearing parts. The differences in the force–displacement data and the mechanical parameters between the tenon composite block and “Martha” block specimens, such as the higher strength and stiffness of the tenon composite block specimen and similar ductility performance with the widely applied “Martha” specimen, were mainly caused by the size differences between the tenon composite block and “Martha” specimens. Finally, suggestions for tenon composite block applications are proposed to overcome the limitations of the tenon composite block’s ability to consume seismic energy.

Seismic Performance of RC Short Columns Strengthened with BFRP

2013 ◽  
Vol 351-352 ◽  
pp. 1532-1536 ◽  
Author(s):  
Bin Ding ◽  
Li Jun Ouyang ◽  
Zhou Dao Lu ◽  
Wei Zhen Chen
Keyword(s):  
Seismic Performance ◽  
Failure Modes ◽  
Low Cost ◽  
Economic Cost ◽  
Shear Capacity ◽  
Good Prospect ◽  
Loading Test ◽  
Fiber Reinforced Plastic ◽  
Short Columns ◽  
Reinforced Plastic

BFRP has excellent strength, durability, thermal properties and economic cost. To test seismic performance of short columns strengthened with BFRP. Low cyclic loading test was conducted on one comparative short column and two RC short columns strengthened with BFRP. The test shows that short columns warped by BFRP show excellent failure modes, shear capacity, ductility and energy dissipation. As a new fiber reinforced plastic, BFRP has a good prospect in the area of seismic strengthening for its low cost and comprehensive mechanical properties.

Seismic Performance of Steel Beam-Column Joint under Low Cyclic Loading with Multiple Cycles

2013 ◽  
Vol 353-356 ◽  
pp. 2069-2072
Author(s):  
Hua Ma ◽  
Xue Wei Zhang ◽  
Zhen Bao Li ◽  
Wen Jing Wang ◽  
Fang Liang Zhang ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Seismic Performance ◽  
Mechanical Performance ◽  
Plastic Hinge ◽  
Cover Plate ◽  
Cycle Number ◽  
Skeleton Curve ◽  
Column Joint ◽  
Low Cyclic Loading ◽  
Steel Joints

An experiment of three T-shape beam-column steel joints with intensive cover plate was conducted under low cyclic loading with different cycle numbers, to study seismic performance of the joints subjected to long-period ground motions. Effects of cycle number on mechanical performance and length of plastic hinge were analyzed. The results show that as the cycle number increases, capacity of the joint decreases, and plastic hinge of the joint develops longer which appears closer to the cover plate, and the platform of skeleton curve grows longer, and the stiffness attenuates slightly.

SEISMIC BEHAVIOR OF FRAMES WITH UNEVEN LARGE SECTION BEAMS OF TRADITIONAL WOODEN STRUCTURE

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Noriko Takiyama ◽  
Naoto Idate
Keyword(s):  
Cyclic Loading ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Failure Behavior ◽  
Shear Forces ◽  
Loading Test ◽  
Large Section ◽  
Cyclic Loading Test ◽  
Directional Dependence ◽  
The One

We report the progress of our research on understanding the seismic performance of frames with uneven large section beams and clarify the influence of the height of beams and the shape of fitting type joints on the behavior of the frame. In this study, we conducted a cyclic loading test for four test frames with spans of one or two and investigated the seismic performance and failure behavior. The major findings for the two-span frames are summarized as follows. (a) They caused fatal damage more readily than the one-span frames. The column that was caught in the even beams broke before other damage occurred. (b) Because of the asymmetry of the frame or the shape of the column-beam joints, the shear forces had directional dependence.

Autoclaved Fly Ash-Lime Brick Wall of the Proposed Shear Strength Formula

2012 ◽  
Vol 430-432 ◽  
pp. 1906-1909
Author(s):  
Lin Pan ◽  
Chun Han
Keyword(s):  
Shear Strength ◽  
Fly Ash ◽  
Engineering Design ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Brick Wall ◽  
Calculation Formula ◽  
Vertical Loading ◽  
Mortar Strength ◽  
Strength Formula

In this paper, the author by 12 slices fly ash brick masonry wall (solid brick and cork brick) slice, 2 slices of sintering ordinary brick masonry wall under cyclic horizontal and vertical loading experiment (including different normal stress, different mortar strength, and presence of post) is given, according to three of the most popular theory. The author suggest the autoclaved fly ash brick masonry proposed formula with Changsha university of science and technology, and Chongqing university the relative test data after that compared, autoclaved fly ash brick wall shear strength calculation formula is recommended. The method of the present paper may provide an important reference to engineering design as well as code revision.

Seismic Performance Study of Concrete Porous Brick Wall

2011 ◽  
Vol 250-253 ◽  
pp. 2371-2375
Author(s):  
Hua Wei Zhao ◽  
Xiu Qin Cui ◽  
Tong Hao
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Shear Capacity ◽  
Hysteresis Curve ◽  
Brick Wall ◽  
Performance Study ◽  
Design Code ◽  
Loading Test ◽  
Seismic Design Code ◽  
Shear Bearing Capacity

Four constructional columns with concrete porous brick walls were constructed for low cyclic loading test. The damage on the characteristics and strength of the wall, hysteresis curve, ductility and other seismic performance were analyzed. Setting constructional columns in the wall at both ends increase the ultimate strength and improve its deformation, ductility and other properties. Meanwhile the height-wide-ratio of wall, axial pressure and other factors on the shear bearing capacity on the wall have been studied. Based on the shear capacity formula of wall in the Structural Seismic Design Code, considering the contribution of the constructional columns on the shear strength, according to the results, the shear capacity formula of constructional columns with concrete brick walls is presented.

Seismic performance of concrete walls reinforced by high-strength bars: cyclic loading test and numerical simulation

2021 ◽  
Author(s):  
Xiangyong Ni ◽  
Shuangyin Cao ◽  
Hassan Aoude
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Numerical Study ◽  
Shear Walls ◽  
High Strength ◽  
Test Results ◽  
3D Fem ◽  
Seismic Behaviour ◽  
Loading Test

This study examines the influence of cross-section shape on the seismic behaviour of high-strength steel reinforced concrete shear walls (HSS-RC) designed with Grade HRB 600 MPa reinforcement. As part of the study, two flexure-dominant walls with rectangular and T-shaped cross-sections, are tested under reversed cyclic loading. Seismic performance is evaluated by studying the failure characteristics, hysteretic curves, energy dissipation, ductility and reinforcing bar strains in the two walls. As part of the numerical study, two-dimensional (2D) and three-dimensional (3D) finite element modelling (FEM) are used to predict the seismic response of the rectangular and T-shaped walls, respectively. The test results show that compared to the rectangular wall, the flange in the T-shaped HSS-RC wall increased strength, energy dissipation and stiffness, but decreased ductility. The analytical hysteretic curves calculated using 2D and 3D FEM analyses show good agreement with the experimental test results.

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