Evaluation on the ultimate bearing capacity for laminated bamboo lumber columns under eccentric compression

Structures ◽  
2020 ◽  
Vol 28 ◽  
pp. 1572-1579 ◽  
Author(s):  
Haitao Li ◽  
Jingwen Su ◽  
Zhenhua Xiong ◽  
Mahmud Ashraf ◽  
Ileana Corbi ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Eccentric Compression ◽  
Laminated Bamboo ◽  
Laminated Bamboo Lumber

scholarly journals Experimental study on laminated bamboo lumber column

2018 ◽  
Vol 38 ◽  
pp. 02001 ◽  
Author(s):  
Chenwei Wang ◽  
Huizhong Zhang ◽  
Chenjie Zhao ◽  
Chenge Zhang ◽  
Tongwei Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Stress ◽  
Bearing Capacity ◽  
Influencing Factors ◽  
Ultimate Load ◽  
Eccentric Compression ◽  
Laminated Bamboo ◽  
Standard Normal ◽  
Laminated Bamboo Lumber

This paper presents and discusses the experimental study on the mechanical properties of LBL column both under axial and eccentric compression. The results shows that the ultimate load for the eccentric compression specimens with the eccentricity values of 30 mm and 110 mm are 95.2 kN and 31.8 kN respectively. Eccentricity is one of the main influencing factors for the ultimate bearing capacity of the LBL columns. Because of the vulnerability of the mechanical connections or natural nodes to tensile stress and secondly, laminated bamboo is vulnerable to defects that has more detrimental influence on the tensile resistance of the material. The variation in strain for the laminated bamboo lumber column sections is linear throughout the loading process, following standard normal section bending theory which is similar as that for the beam.

scholarly journals Slenderness Ratio Effect on the Eccentric Compression Performance of Chamfered Laminated Bamboo Lumber Columns

2021 ◽  
Vol 9 (12) ◽  
pp. 165-182
Author(s):  
Ke Zhou ◽  
Haitao Li ◽  
Assima Dauletbek ◽  
Dong Yang ◽  
Zhenhua Xiong ◽  
...  
Keyword(s):  
Slenderness Ratio ◽  
Ratio Effect ◽  
Compression Performance ◽  
Eccentric Compression ◽  
Laminated Bamboo ◽  
Laminated Bamboo Lumber

scholarly journals Mechanical evaluation for laminated bamboo lumber along two eccentric compression directions

2016 ◽  
Vol 62 (6) ◽  
pp. 503-517 ◽  
Author(s):  
Hai-tao Li ◽  
Gang Wu ◽  
Qi-sheng Zhang ◽  
Jing-Wen Su
Keyword(s):  
Eccentric Compression ◽  
Laminated Bamboo ◽  
Laminated Bamboo Lumber

Experimental Study on the Effect of Steel-Tube Replacement Ratio on the Eccentric Compression Bearing Capacity of Composite Column

2011 ◽  
Vol 415-417 ◽  
pp. 1421-1426
Author(s):  
Xu Hong Zhang ◽  
Quan Quan Guo
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Slenderness Ratio ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Test Results ◽  
Replacement Ratio ◽  
Composite Columns ◽  
Eccentric Compression ◽  
Improvement Effect

The improvement effect of the external concrete to stability of the core steel-tube was demonstrated by the steel-tube replacement ratio through experimental study. The test results show that, with the steel-tube replacement ratio increasing, the ultimate bearing capacity of composite columns increased correspondingly, and the ductility of composite columns was improved obviously also. Therefore, the steel-tube replacement ratio should be involved in the formula for calculating the ultimate bearing capacity of composite columns. By finite element method and regression analysis, the slenderness ratio is amended by the steel-tube replacement ratio and the calculation results of the eccentric compression bearing capacity agreed well with the test results．

Mechanical properties of laminated bamboo lumber column under radial eccentric compression

2016 ◽  
Vol 121 ◽  
pp. 644-652 ◽  
Author(s):  
Hai-tao Li ◽  
Guo Chen ◽  
Qisheng Zhang ◽  
Mahmud Ashraf ◽  
Bin Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Eccentric Compression ◽  
Laminated Bamboo ◽  
Laminated Bamboo Lumber

scholarly journals An Investigation of Bearing Capacity of High-Strength SRC Columns under Eccentric Axial Load

Buildings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 639
Author(s):  
Jun Wang ◽  
Yuxin Duan ◽  
Wenze Sun ◽  
Xinyu Yi
Keyword(s):  
Bearing Capacity ◽  
High Strength ◽  
Ultimate Bearing Capacity ◽  
Parameter Analysis ◽  
Test Results ◽  
Compression Tests ◽  
Steel Ratio ◽  
Eccentric Compression ◽  
Steel Strength ◽  
Relative Eccentricity

This paper investigates the eccentric compression performance of high-strength steel reinforced concrete (SRC) columns. In addition, the feasibility of the calculation codes used for the load-carrying capacity of these columns is verified by eccentric compression tests on 10 high-strength SRC columns with Q460 and Q690 steels and two normal SRC columns with Q235 steel. Moreover, the influence of the steel strength, relative eccentricity, steel ratio, and stirrup spacing on the bearing capacity and ductility of the specimens is analyzed. It was found that the bearing capacity and ductility of the specimens significantly increases when the steel strength increases from 276.5 MPa to 774.2 MPa; the bearing capacity of the Q690 SRC column is slightly higher than that of the Q460 SRC column. In addition, the ductility coefficient of the Q690 SRC columns is significantly higher than that of the Q460 SRC columns. It was also found that increasing the eccentricity and steel ratio can improve the ductility of the specimens and the smaller stirrup spacing can enlarge the contribution of Q690 steel under the ultimate bearing capacity. It is demonstrated that Eurocode 4-2004 and AISC360-16 codes significantly underestimate the test results. In contrast, JGJ138-2016 slightly underestimates the test results when the relative eccentricity is 0.2 but overestimates the test results when the relative eccentricity is 0.6. Furthermore, in order to maximize the contribution of Q690 steel under ultimate bearing capacity, the expanded parameter analysis is carried out using a finite element model. Following the analysis results, the suggestions for designing high-strength SRC columns under eccentric load are provided.

scholarly journals Prediction and Analysis of Ultimate Bearing Capacity of Square CFST Long Column under Eccentric Compression after Acid Rain Corrosion

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2568
Author(s):  
Xuetao Lyu ◽  
Liqiang Zhang ◽  
Tong Zhang ◽  
Ben Li ◽  
Huan Li ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Bearing Capacity ◽  
Acid Rain ◽  
Slenderness Ratio ◽  
Compressive Load ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Steel Ratio ◽  
Eccentric Compression ◽  
Section Size

This paper adopts the method of steel tube wall thickness and strength reduction to simulate corrosion damage. The numerical model of the square concrete-filled steel tube long column (SCFST-LC) under eccentric compression after acid rain corrosion is established in the finite element software, ABAQUS. The reliability and accuracy of the model are verified by comparing it with published relevant experimental results. The failure mode, load-deformation curve, and ultimate compressive load were analysed. Following that, the impacts of section size, yield strength of the steel tube, axial compressive strength of concrete, steel ratio, slenderness ratio, and load eccentricity on its ultimate compressive load are comprehensively investigated. The results demonstrate that the ultimate compressive load of the SCFST-LC decreases significantly with the increase in corrosion rate. The corrosion rate increases from 10 to 40%, and the ultimate bearing capacity decreases by 37.6%. Its ultimate bearing capacity can be enhanced due to the increase in section size, material strength, and steel ratio. In contrast, the ascending slenderness ratio and load eccentricity has harmful effects on the ultimate compressive load of the specimens. Finally, a simplified formula for the axial compressive load of the SCFST-LC under eccentric compression after acid rain corrosion is proposed. The calculation accuracy is high and the deviation of the results is basically within 15%, which is in good agreement with the numerical simulation results.

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