Experimental Study of Recycled Concrete Columns with Corroded Rebars under Axial Force

2011 ◽  
Vol 261-263 ◽  
pp. 79-83
Author(s):  
Jia Xu ◽  
Jin Wu
Keyword(s):  
Experimental Study ◽  
Ultimate Load ◽  
Concrete Columns ◽  
Recycled Concrete ◽  
Test Results ◽  
Axial Deformation ◽  
Factors Affecting ◽  
Failure Patterns ◽  
Rebar Corrosion ◽  
Major Factors

Corrosion is one of the major factors affecting the durability of recycled concrete structures. Through experimental test of seven recycled concrete columns with corroded rebars, issues were discussed concerning the failure patterns, the effects of the degree of rebar corrosion on the ultimate load and axial deformation of recycled concrete columns. The test results show that the ultimate load decreases and the axial deformation increases as the degree of rebar corrosion increases.

Mechanical Properties of Large Scale Confined Concrete

2011 ◽  
Vol 94-96 ◽  
pp. 1983-1988
Author(s):  
Jia Song ◽  
Zhen Bao Li ◽  
Yong Ping Xie ◽  
Xiu Li Du ◽  
Yue Gao
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Axial Compression ◽  
Large Scale ◽  
Plain Concrete ◽  
Concrete Columns ◽  
Confined Concrete ◽  
Transverse Reinforcement ◽  
Test Results ◽  
Reinforcement Configuration

An experimental study was made of the mechanical properties of large scale confined concrete subjected to the axial compression test. Eleven tied concrete columns and six plain concrete prisms were tested. In the test, each specimen had the same transverse reinforcement configuration, and similar volumetric ratio of lateral steel, while different size. The test results in this paper indicate that the size of the specimen has no obvious relationship with the ultimate strength, however, it does affect the post-peak ductility to some extent. As a supplement to the experimental study, a finite element method was adopted to imitate the mechanical behavior of the confined concrete under axial compression. The results of the imitation in this paper indicate the confinement mechanism of large scale specimens.

Experimental Study on Seismic Performance of HRB400 Reinforced Concrete Columns under Cyclic Loading

2011 ◽  
Vol 287-290 ◽  
pp. 703-707
Author(s):  
Yan Han ◽  
Hong Cheng Guan ◽  
Zhen Li
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Seismic Performance ◽  
High Strength ◽  
Concrete Columns ◽  
Reinforced Concrete Columns ◽  
Failure Patterns ◽  
Steel Bar ◽  
Hysteretic Characteristics ◽  
Ductile Behavior

Through experimental study on three HRB400 steel bar reinforced concrete columns subjected to low cyclic reversed loading, the failure patterns, hysteretic curves and skeleton curves were obtained. The influence of longitudinal high-strength reinforcement ratio upon the hysteretic characteristics, ductile behavior and ability of energy dissipation were analyzed. The results show that the main failure pattern was bending failure; and with the increscent of the longitudinal high-strength reinforcing steel bar ratio, the columns can endure larger seismic loads and displacement; the seismic performance of the whole reinforced concrete columns can be effectively improved by arranging reasonable high-strength steel bars.

Finite Element Analysis of Friction Coefficient on Recycled Concrete Wall-Beam Interface

2014 ◽  
Vol 578-579 ◽  
pp. 699-702
Author(s):  
Min Zhang ◽  
Chuan Long Zou ◽  
Xiao Jian Fu
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Ultimate Load ◽  
Element Model ◽  
Recycled Concrete ◽  
Brick Wall ◽  
Maximum Deflection ◽  
Test Results ◽  
Concrete Wall ◽  
Element Analysis

Mechanical testing on the first group of ordinary brick wall-beam and second group of recycled brickbat concrete wall-beam, measured its ultimate load and the maximum deflection, establishing finite element model to analyze, and comparing with the test results. It will be show that under the action of ultimate load, friction coefficient between the upper-wall of the wall-beam and joist can be desirable between 0.35 ~ 0.45, and the friction coefficient of recycled concrete wall-beam is bigger than ordinary wall-beam, and the higher the intensity of the upper-wall is, the bigger its friction coefficient is, as well as the greater stiffness of the wall-beam is.

Summary of major factors affecting mechanical properties of TiZr based alloys

2015 ◽  
Vol 12 (4) ◽  
pp. 319-324 ◽  
Author(s):  
Lixia Yin ◽  
Shunxing Liang ◽  
Liyun Zheng
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Test Results ◽  
Factors Affecting ◽  
Β Phase ◽  
Α Phase ◽  
Tc4 Alloy ◽  
Nanoindentation Hardness ◽  
Major Factors ◽  
Zr Alloy

Effects of major factors, such as alloy composition, crystal structure and grain size, on mechanical properties of TiZr based alloys are investigated and summarized in this work. The microhardness of TC4 alloy obviously increases 15.3% and 17.6% after 30 wt.% and 47 wt.% Zr additions, respectively. Nanoindentation results show that the average nanoindentation hardness of α phase in annealed 30 Zr is approximately 18% higher than that of retained β phase. Tensile test results show that variation in strength of basketweave microstructural 30 Zr alloy with original β grain size from 100 to 203 μm is less than 2%.

Research on Bearing Capacity of Short Concrete Filled Double Skin Steel Tubes Columns under Axial Compression

2010 ◽  
Vol 168-170 ◽  
pp. 2154-2157
Author(s):  
Jing Yu Chen ◽  
Ying Hai
Keyword(s):  
Axial Compression ◽  
Ultimate Load ◽  
Concrete Columns ◽  
Steel Tube ◽  
Confined Concrete ◽  
Load Estimation ◽  
Test Results ◽  
Steel Tubes ◽  
Double Skin ◽  
Structural Engineers

The use of steel tube confined concrete columns has been the interests of many structural engineers. For investigation of the axially loading capacity of short concrete filled double skin tubes (CFDST) columns, axial compression loading experiments were carried on 9 short CFDST column samples. According to experimental results and with numerical analysis, an ultimate load estimation equation of CFDST column with one correction parameter is presented, the linear relation between the parameter and the inner-to-outer diameters ratio Di/Do is given out. The ultimate load estimation equation is validated by the test results of short CFDST column samples.

Experimental Study on the Axial Behaviour of Cold-Formed Thin-Walled Steel Framing Wall Studs

2011 ◽  
Vol 194-196 ◽  
pp. 1858-1863
Author(s):  
Yu Shi ◽  
Xu Hong Zhou ◽  
Xiao Li Yuan ◽  
Shao Feng Nie
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Ultimate Load ◽  
Oriented Strand Board ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Steel Framing ◽  
Load Carrying ◽  
Axial Behavior ◽  
Thin Walled

A full-scale experimental study on the axial behavior of cold-formed thin-walled steel framing wall studs is presented. The influence of parameters, including whether the studs are sheathed or not, sheathing materials, the screws spacing and the studs spacing, on the bearing capacity of studs under vertical compression is analyzed by the test. The test results of the six wall specimens show that: the load carrying capacity of a stud increases significantly when it is covered with sheathings; the ultimate load of the stud sheathed with fiber reinforced calcium silicate board(CSB) is about 18.8 percent higher than that sheathed with oriented strand board(OSB); when the wall frames are sheathed with OSB or plasterboard, the change of screws spacing has little effect on the bearing capacity, however, the bearing capacity of CSB-sheathed wall stud will fall when the screws spacing decreases from 300mm to 150mm; when the studs spacing increases, the bearing capacity of stud decreases slightly.

Sign in / Sign up

Export Citation Format

Share Document