scholarly journals Energy Absorption Capacity of uPVC-Confined Concrete

2021 ◽  
Vol 2 (2) ◽  
pp. 1-5
Author(s):  
Nwzad Abduljabar Abdulla
Keyword(s):  
Composite System ◽  
High Strength ◽  
Absorption Capacity ◽  
Repeated Loading ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Concrete Core ◽  
Compression Load ◽  
Explosive Failure ◽  
Stub Columns

This research documents the results of tests on stub columns tested under repeated monotonic compression load. Two unplasticized polyvinyl chloride (uPVC) tubes were filled with normal and high strength concrete. From each type of concrete three control specimens were also cast for comparison purposes. The experimental test results show that the unconfined specimens were crushed in the first cycle of loading in contrast to the confined specimens which continued to resist the applied load after several cycles of repeated loading. Furthermore, by using the polymeric tube, the failure of concrete core switches from sudden explosive failure to non-brittle failure with the composite specimen undergoing large progressive deformation in each cycle of loading. For each cycle of loading, the material damage in the composite system was evaluated in terms of the deformations in both the lateral and axial directions.

ALUMINUM ALLOY 201.0

Alloy Digest ◽  
1995 ◽  
Vol 44 (7) ◽  
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Absorption Capacity ◽  
Casting Alloy ◽  
Permanent Mold ◽  
Energy Absorption Capacity ◽  
Temperature Performance

Abstract ALUMINUM ALLOY 201.0 is a structural casting alloy available as sand, permanent mold and investment castings. It is used in structural casting members, applications requiring high tensile and yield strengths with moderate elongation, and where high strength and energy-absorption capacity are needed. This datasheet provides information on composition, physical properties, and elasticity as well as creep and fatigue. It also includes information on high temperature performance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: AL-336. Producer or source: Various aluminum companies.

scholarly journals Structural performance of link slabs subjected to monotonic and fatigue loading incorporating engineered cementitious composites

2021 ◽  
Author(s):  
Shirin Ghatreh Samani
Keyword(s):  
Fatigue Loading ◽  
Absorption Capacity ◽  
Superior Performance ◽  
Structural Performance ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Self Consolidating Concrete ◽  
Design Specifications ◽  
Ductility Index ◽  
Energy Absorbing

This research presents the results of experimental investigation conducted on 1/4th scale link slabs subjected to monotonic and fatigue loading incorporating different ECC mixtures and self-consolidating concrete (SCC). The structural performance for the link slabs are evaluated based on the load-deformation/moment-rotation responses, strain developments, cracking patterns, ductility index and energy absorption capacity. Test results of a 1/6th scale full bridge with ECC link slab tested under monotonic loading up to service stage is also described. The experimental link slab moment resistance and its length are compared with those obtained from theoretical and design specifications. The ECC link slabs demonstrated superior performance exhibiting high residual strength and energy absorbing capacity and prolonged life (associated with enduring large number of fatigue cycles) compared to their SCC even though subjected to higher fatigue stress levels. This research confirmed the viability of ECC link slab to construct joint-free bridges satisfying serviceability and design specifications.

Energy Absorption Capacity of Thermally Sprayed Aluminium Friction Damper

1996 ◽  
Author(s):  
S. Ono ◽  
Japan K. Nakahira ◽  
S. Tsujioka ◽  
K. Inoue
Keyword(s):  
High Strength ◽  
Absorption Capacity ◽  
Repeated Loading ◽  
Friction Damper ◽  
Faying Surface ◽  
New Type ◽  
Friction Joint ◽  
Force Contact ◽  
Thermally Sprayed ◽  
Hysteresis Characteristics

Abstract When buildings are subjected to earthquakes, dampers are effective in decreasing their failure by absorbing the input energy. An object of this study is to develop a new type of friction damper, on whose faying surface aluminium is sprayed, and the double friction joint is tightened with a high-strength bolt. When slip occurs on this friction damper, the slip coefficient is high and comparatively stable. Specimens of the friction damper were tested under the dynamic repeated loading condition to investigate the effect of the condition of the faying surface on the dynamic hysteresis characteristics. The parameters of the test are the type of sprayed metal, the sprayed side of the plate(s), thickness of sprayed metal, the finish of the sprayed surface, and initial clamping force (contact pressure). Results indicate that there exists the condition of suitable characteristics of a metal sprayed friction damper.

Energy-Absorbing Characteristics of the Stiffened Thin-Walled Tubes Subjected to Axial Crushing

2013 ◽  
Vol 437 ◽  
pp. 158-163
Author(s):  
Wei Liang Dai ◽  
Xu Guang Li ◽  
Qing Chun Wang
Keyword(s):  
Energy Absorption ◽  
Specific Energy ◽  
Absorption Capacity ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Specific Energy Absorption ◽  
Axial Crushing ◽  
The Mean ◽  
Thin Walled ◽  
Energy Absorbing

Energy absorbing characteristics of the non-stiffened and stiffened single hat sections subjected to quasi-static axial crushing were experimentally investigated. First non-stiffened hat sections were axially crushed, then structures with different stiffened methods (stiffened in hat and stiffened in the plate) were tested, finally energy absorption capacities of these structures were compared. Test results showed that, for the appropriate designed stiffened tube, the mean crush force and mass specific energy absorption were increased significantly compared to the non-stiffened. Stiffened in hat section showed a little more energy absorption capacity than that stiffened in the plate, but the structure may sustain a global bending.

scholarly journals Tests on sea sand concrete-filled stainless steel tubular stub columns

2018 ◽  
Author(s):  
Feiyu Liao ◽  
Chao Hou ◽  
W. J. Zhang ◽  
J. Ren
Keyword(s):  
Stainless Steel ◽  
Concrete Strength ◽  
High Strength ◽  
Normal Concrete ◽  
River Sand ◽  
Concrete Core ◽  
Cross Sectional ◽  
Composite Columns ◽  
Sea Sand ◽  
Stub Columns

This paper presents a series of tests on sea sand concrete-filled stainless steel tubular (SSCFST) stub columns under axial compression, where the main test parameters include type of fine aggregates (river sand, desalted sea sand and sea sand), steel ratio, and concrete strength. The failure mode, axial load versus axial shorten response, cross-sectional strength of the SSCFST specimens are investigated and compared with those of traditional composite columns with normal concrete. The confinement effect between stainless tube and the sea sand concrete is also evaluated. High strength and good ductility was observed for the tested SSCFST stub columns. In general, when being used as the concrete core in a composite column, differences of confinement behaviour between sea sand concrete and normal concrete are not significant, indicating the potential adoption of SSCFST columns in practice.

scholarly journals Structural performance of link slabs subjected to monotonic and fatigue loading incorporating engineered cementitious composites

2021 ◽  
Author(s):  
Shirin Ghatreh Samani
Keyword(s):  
Fatigue Loading ◽  
Absorption Capacity ◽  
Superior Performance ◽  
Structural Performance ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Self Consolidating Concrete ◽  
Design Specifications ◽  
Ductility Index ◽  
Energy Absorbing

This research presents the results of experimental investigation conducted on 1/4th scale link slabs subjected to monotonic and fatigue loading incorporating different ECC mixtures and self-consolidating concrete (SCC). The structural performance for the link slabs are evaluated based on the load-deformation/moment-rotation responses, strain developments, cracking patterns, ductility index and energy absorption capacity. Test results of a 1/6th scale full bridge with ECC link slab tested under monotonic loading up to service stage is also described. The experimental link slab moment resistance and its length are compared with those obtained from theoretical and design specifications. The ECC link slabs demonstrated superior performance exhibiting high residual strength and energy absorbing capacity and prolonged life (associated with enduring large number of fatigue cycles) compared to their SCC even though subjected to higher fatigue stress levels. This research confirmed the viability of ECC link slab to construct joint-free bridges satisfying serviceability and design specifications.

HYBRID SIMULATION ON SEMI-RIGID PARTIAL-STRENGTH CONNECTIONS

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4445-4450
Author(s):  
KENICHI OHI ◽  
JAE-HYOUK CHOI
Keyword(s):  
Plastic Deformation ◽  
High Strength ◽  
Absorption Capacity ◽  
Hysteretic Behavior ◽  
Energy Absorption Capacity ◽  
End Plate ◽  
Rotation Capacity ◽  
Collapse Mode ◽  
Bolt Failure ◽  
Plate Connections

Semi-rigid connections are considered neither completely pinned nor rigid. It is possible to control collapse mode and even the energy absorption capacity of frames during earthquakes. In this paper, (1) hysteretic behavior of end-plate connections subjected to cyclic and earthquake loading and (2) improvement of their rotation capacities are described. Two types of connections are prepared, extended and flush end-plate. Additional specimens of flush type are tested to improve their rotation capacities using high strength bolts with reduced shaft diameter. As a result, the capacity for plastic deformation of the connection is increased two times over those with JIS standard bolts. In case of bolt failure the rotation capacity is well predicted from the bolt elongation capacity.

Static and Dynamic Crushing Behaviors of Aluminum Foam

2011 ◽  
Vol 675-677 ◽  
pp. 601-605
Author(s):  
Qing Chun Wang ◽  
Hao Long Niu ◽  
Guo Quan Wang ◽  
Yu Xin Wang
Keyword(s):  
Energy Absorption ◽  
Aluminum Foam ◽  
Absorption Capacity ◽  
High Mass ◽  
Test Results ◽  
Energy Absorption Capacity ◽  
Strain Relationship ◽  
Compression Characteristics ◽  
Very High ◽  
Dynamic Crushing

Quasi-static and dynamic axial crushing tests were carried out to investigate the energy absorption capacity of aluminum foam with several densities. First, aluminum foam samples with three densities were crushed quasi-statically to study their compression characteristics, the stress strain relationship curves and energy absorption capacities were achieved from the test results; then dynamic crushing tests were carried out to check the crushing behaviors of the corresponding samples; finally, the energy absorption capacities of tested samples were compared. According to the tests results, all the aluminum foam samples showed very good isotropy and very high mass specific energy absorption capacities. For the crushing tests, the dynamic crushing behaviors were very similar to the static ones, which meant aluminum foam was insensitive to the crash velocity tested.

scholarly journals Cold-Formed Steel Beam-Column Joints with Latex Layer Wrapping

2019 ◽  
Vol 9 (2) ◽  
pp. 3132-3135
Keyword(s):  
High Strength ◽  
Absorption Capacity ◽  
Steel Beam ◽  
Energy Absorption Capacity ◽  
Primary Element ◽  
Strength Capacity ◽  
Steel Column ◽  
Ductile Steel ◽  
Cold Formed Steel ◽  
Seismic Forces

Columns are the primary element of a structure and are the first element to face the effect of lateral load during an earthquake. To resist such lateral seismic loading high strength and ductile steel frames with higher energy absorption capacity are generally preferred. The nominal ductile capacity of the steel can be boosted up with additional wrapping that could optimize the seismic performance significantly. The present work deals on the behaviour of cold-formed steel beam and cold formed steel column wrapped with latex layers for strengthening. The specimens were subjected to reversed quasi-static cyclic loading to partially simulate the seismic forces. Experimental results shows significant increase in strength capacity of beam-column with latex layer wrapping.

scholarly journals Mechanical Properties of New Dry-Type Beam-Column Bolt Connection Joint

2019 ◽  
Vol 11 (12) ◽  
pp. 3348 ◽  
Author(s):  
Wei Ma ◽  
Yue Li ◽  
Kewei Ding ◽  
Baoquan Cheng ◽  
Jianhua Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Dissipation ◽  
High Strength ◽  
Repeated Loading ◽  
Test Results ◽  
Static Test ◽  
Structural Framework ◽  
Good Energy ◽  
Bolt Connection ◽  
Mode Energy

Beam–column assembled joint connections are crucial for realizing the industrialization of buildings through prefabrication. This paper focuses on the mechanical properties of a new dry-type high-strength bolt connection joint used in prefabricated buildings. The structural performance properties examined include bearing capacity, stiffness, failure mode, energy dissipation capacity, and deformation performance, all of which are tested through a pseudo static test involving low-cycle repeated loading. The test results show that the failure of the new dry-type beam–column connection joint is through plastic failure, with full hysteretic curve and good energy dissipation performance. The results provide a foundation for the analysis of assembled structural framework systems based on different forms of dry-type connection joints.

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