Seismic Strengthening of Masonry School Building with Steel Mesh Mortar Splint

2013 ◽  
Vol 351-352 ◽  
pp. 382-385 ◽  
Author(s):  
Hao Wu ◽  
Shi Chun Zhao ◽  
Hu Xu
Keyword(s):  
Failure Mechanism ◽  
Masonry Structure ◽  
School Buildings ◽  
Seismic Strengthening ◽  
Load Bearing Capacity ◽  
Characteristic Energy ◽  
Static Test ◽  
Steel Mesh ◽  
Energy Dissipation Capacity ◽  
Damage Characteristic

Quasi-static test on a half-scale two-story masonry model was carried out to study the seismic strengthening performance and damage characteristic of existing masonry school buildings. The wall piers between openings were partially strengthened with steel mesh mortar splint where the steel mesh is reliably anchored using vertical reinforcements. The results show that strong pier-weak spandrel failure mechanism is guaranteed due to the formation of global failure mechanism. The failure characteristic, energy dissipation capacity and load bearing capacity of masonry structure are significantly improved.

A Comparative Study on Seismic Reinforcement Test of Beijing Rural Brick Building

2011 ◽  
Vol 194-196 ◽  
pp. 1951-1957
Author(s):  
Wei Yang ◽  
Man Sheng Wang ◽  
Er Yu Zhu ◽  
Yu Cheng
Keyword(s):  
Concrete Columns ◽  
Load Resistance ◽  
Masonry Structure ◽  
Comparison Process ◽  
Systematic Analysis ◽  
Static Test ◽  
Steel Mesh ◽  
Mortar Strength ◽  
Energy Dissipation Capacity ◽  
Lateral Load Resistance

In terms of the characteristics of Beijing masonry Structure, the quasi-static test is performed to the rural single-storey brick structure in the study. There are four sets of test specimens discussed in the paper. The first and second specimens are the unreinforced wall with different mortar strength and used for reference purpose, the others are the specimens which are strengthened by using steel mesh mortar and reinforced concrete columns with ring beam respectively. The testing phenomena of all specimens are compared in the paper. Meanwhile, the three parameters of lateral load resistance，hysteretic curve and deformability capacity are concerned in comparison process. Moreover, the mechanism of resistance and energy dissipation capacity of both reinforcement methods are analyzed in the study, and then the steel mesh mortar will be a proper method to use in the Beijing rural brick building seismic reinforcement. The systematic analysis in the paper provides theory basis on the seismic reinforcement in the Beijing rural reconstruction.

Research on the Joint of Concrete-Filled Steel Tubular Column and Steel Beam

2013 ◽  
Vol 351-352 ◽  
pp. 174-178
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Failure Mechanism ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Strength Degradation ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity

With the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: when reached the ultimate strength, the strength degradation and stiffness degradation of joints are slowly and the ductility is also good, the energy dissipation capacity of joints is much better.

Experimental investigation of seismic performance of a novel isostatic frame-cladding system

2022 ◽  
pp. 136943322110572
Author(s):  
Xun Chong ◽  
Pu Huo ◽  
Linlin Xie ◽  
Qing Jiang ◽  
Linbing Hou ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Damage Evolution ◽  
Failure Modes ◽  
Static Load ◽  
Precast Concrete ◽  
Frame Structure ◽  
Deformation Capacity ◽  
Load Bearing Capacity ◽  
Cladding Panels ◽  
Energy Dissipation Capacity

A new connection measure between the precast concrete (PC) cladding panel and PC frame structure is proposed to realize a new kind of isostatic frame-cladding system. Three full-scale PC wall-frame substructures were tested under the quasi-static load. These substructures included a bare wall-frame specimen, a specimen with a cladding panel that has no opening, and a specimen with a cladding panel that has an opening in it. The damage evolution, failure mode, load-bearing capacity, deformation capacity, and energy dissipation capacity of three specimens were compared. The results indicated that the motions of the cladding panels and the main structures were uncoupled through the relative clearance of the bottom connections, and three specimens exhibited approximately identical failure modes and seismic performance. Thus, the reliability of this new isostatic system was validated.

Test Study on the Rigidity Degradation and Energy Dissipation of High-Strength Reinforced Concrete Columns with Central Reinforcement

2010 ◽  
Vol 163-167 ◽  
pp. 398-405
Author(s):  
San Sheng Dong ◽  
Zi Xue Lei ◽  
Jun Hai Zhao
Keyword(s):  
Energy Dissipation ◽  
High Strength ◽  
Concrete Columns ◽  
High Energy ◽  
Affecting Factors ◽  
Static Test ◽  
Test Study ◽  
Core Areas ◽  
Energy Dissipation Capacity ◽  
High Energy Dissipation

Based on the pseudo-static test of 6 high-strength RC columns with central reinforcement skeletons, this paper studied their hysterisis performance, degradation of strength and rigidity, and energy dissipation capacity, with the affecting factors analyzed. The result shows that the central reinforcement skeletons can compensate for the low plasticity and brittle failure susceptibility of high-strength concrete so that all the specimens have stable strength, slow rigidity degradation and high energy dissipation capacity at later stage of loading; the larger the core areas the higher the strengths and ductility of the specimens, but slightly faster the degradation of strength and energy dissipation capacity as compared with the specimens with smaller core areas; the spacing of ties, longitudinal reinforcement ratio of core area both influence the strength degradation and energy dissipation capacity of the specimens, but they have little effect on their strengths.

scholarly journals Vulnerability assessment and feasibility analysis of seismic strengthening of school buildings

2015 ◽  
Vol 13 (12) ◽  
pp. 3809-3840 ◽  
Author(s):  
C. Z. Chrysostomou ◽  
N. Kyriakides ◽  
V. K. Papanikolaou ◽  
A. J. Kappos ◽  
E. G. Dimitrakopoulos ◽  
...  
Keyword(s):  
Vulnerability Assessment ◽  
Feasibility Analysis ◽  
School Buildings ◽  
Seismic Strengthening

Earthquake Damage Forms of Multi-Story Brick Masonry Structure and their Mechanical Analysis

2014 ◽  
Vol 1065-1069 ◽  
pp. 1408-1411
Author(s):  
Hong Biao Liu
Keyword(s):  
Failure Mechanism ◽  
Mechanical Analysis ◽  
Seismic Damage ◽  
Masonry Structure ◽  
Brick Masonry ◽  
Earthquake Damage ◽  
Seismic Capacity ◽  
Earthquake Disaster ◽  
Damage Characteristics ◽  
Important Significance

In order to know seismic damage characteristics of multi-story brick masonry structure and improve its seismic capability, five kinds of earthquake damage or collapse forms of multi-story masonry brick structure are summed up based on earthquake disaster survey, each of which is analyzed with mechanics. And the failure mechanism of each seismic damage form of multi-story brick masonry structure are proposed, which provides effective engineering experience for the seismic or anti-collapse design of multi-story masonry brick structure. The research has the important significance in improving the seismic capacity of multi-story brick masonry structure and reducing the earthquake casualties.

Research on the Seismic Behavior of Concrete-Filled Steel Tubular Column and Steel Beam Joint

2012 ◽  
Vol 204-208 ◽  
pp. 2528-2532
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Earthquake Action ◽  
Energy Dissipation Capacity ◽  
Strength And Stiffness

Joints are the forces cross points of members, and the bearing modes are more complex than other members, especially under earthquake action, so the rationality of joints are directly related to the safe reliability of structure. By the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: the energy dissipation capacity of joints is much better, the degradation of strength and stiffness are slowly when reached the ultimate strength, and the ductility is also good.

Seismic Strengthening on Masonry Structure of Primary and Secondary School Buildings

2011 ◽  
Vol 71-78 ◽  
pp. 626-630
Author(s):  
Xue Feng Zhou ◽  
Xiang Chen
Keyword(s):  
Secondary School ◽  
School Buildings ◽  
Seismic Strengthening ◽  
Project Proposal ◽  
Security Risks ◽  
Quality Detection ◽  
Site Survey ◽  
Earthquake Resistant ◽  
Strengthening Method ◽  
Primary And Secondary School

It is an important issue for engineers and technicians that how to conduct safe identification and earthquake resistant strengthening of the primary and secondary school buildings after Wenchuan earthquake. The paper comprehensively reviewed aspects of quality detection, safety identification and strengthening design of the primary and secondary school buildings in Xi’an district. To address existed security risks, construction progress, construction complexity and period were comprehensively considered to choose corresponding seismic strengthening method based on seismic qualification and site survey. Project proposal was given according to problems in the design, which provides reference to design and construction of following similar projects.

Seismic Behavior Test of Recycled RC Frame Column with Different Axial Compression Ratios

2012 ◽  
Vol 517 ◽  
pp. 564-569
Author(s):  
Jin Song Fan ◽  
An Zhou ◽  
Li Hua Chen ◽  
Bing Kang Liu
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Failure Modes ◽  
Construction Materials ◽  
Recycled Concrete ◽  
Hysteretic Behavior ◽  
Static Test ◽  
Concrete Frame ◽  
Energy Dissipation Capacity

Recycled concrete is a kind of new construction materials, and now received more and more attention from researchers and engineers, since its application in engineering projects can well cater to the increasing requirements of development for economic and environment-friendly society. Based on the pseudo static test of five recycled reinforcement concrete frame columns with different experimental axial compression ratios from 0.3 to 0.65, their failure modes, failure mechanism, hysteretic behavior, skeleton curves, bearing capacity, rigidity, ductility and energy dissipation capacity were discussed. Some possible influence factors and disciplines were also selected and analyzed. The study indicates that recycled reinforcement concrete frame columns in the case of relative low axial compression ratios usually exhibited similar and steady mechanical properties with common concrete columns. With the increase of axial compression ratio, its ductility and energy dissipation capacity are decreased and destruction forms tended to obvious brittle fracture, though its bearing capacity could slightly rise. The test results and analysis also manifest recycled concrete had expectative application potentials in most case.

scholarly journals Effect of column foot tenon on behavior of larch column base joints based on concrete plinth

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6648-6667
Author(s):  
Xiaoli Han ◽  
Jian Dai ◽  
Wei Qian ◽  
Baolong Li ◽  
Yuanjun Jin ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Hysteretic Behavior ◽  
Timber Structures ◽  
Test Results ◽  
Rotational Angle ◽  
Static Test ◽  
Energy Dissipation Capacity ◽  
The Moment ◽  
Reversed Cyclic ◽  
Column Base

The wooden columns in timber structures of ancient buildings have column foot tenons of various sizes. The main reason for these differences is their use for different roof loads. Six full-scale specimens with different sizes of column foot tenon were designed and manufactured. The tree species used for the specimens was larch. The quasi-static test was conducted on the specimens that were used in timber structures of ancient buildings. The effects of column foot tenon size on the mechanical properties of larch wooden columns were studied. The moment-rotational angle hysteretic curves, moment-rotational angle skeleton curves, ductility, stiffness degradation, energy dissipation capacity, slippages between the wooden column and the plinth, and the damage of the column foot tenons were examined. The test results showed that the column foot tenon played an important role in the mechanical behavior of the wooden column under low-cycle reversed cyclic loading. The rotation of the column foot tenon improved the energy dissipation capacity of the wooden column. As the rotational angle of the column base increased, the column foot tenon had different degrees of damage. Different sizes of column foot tenon had their own advantages and hysteretic behavior.

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