http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Lianguang Wang (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Repair of flange damage steel-concrete composite girders using CFRP sheets
Lianguang Wang,Wenyu Hou,Huafeng Han,Junhua Huo 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.55 No.3
Damaged steel-concrete composite girders can be repaired and retrofitted by epoxy-bonded carbon fiber-reinforced polymer (CFRP) sheets to the critical areas of tension flanges. This paper presents the results of a study on the behavior of damaged steel-concrete composite girders repaired with CFRP sheets under static loading. A total of seven composite girders made of I20A steel sections and 80mm-thick by 900mm-wide concrete slabs were prepared and tested. CFRP sheets and prestressed CFRP sheets were used to repair the specimens. The specimens lost the cross-sectional area of their tension flanges with 30%, 50% and 100%. The results showed that CFRP sheets had no significant effect on the yield loads of strengthened composite girders, but had significant effect on the ultimate loads. The yield loads, elastic stiffness, and ultimate bearing capacities of strengthened composite girders had been changed as a result of prestressed CFRP sheets, the utilization ratio of CFRP sheets could be effectively improved by applying prestress to CFRP sheets. Both the yield loads and ultimate bearing capacities had been changed as a result of steel beam’s flange damage level and CFRP sheets could cover the girders’ shortage of bearing capacity with 30% and 50% flange damage, respectively.
-
Bending performance of NSTS members based on steel tube connection
Xueliang Zhang,Lianguang Wang,Bailing Chen,Yaosheng Zhang 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.41 No.1
This paper proposes a NSTS (new steel tube slab) structure by connecting the longitudinal steel tubes with small steel tubes in transverse, in order to decrease the construction difficulty and improve the bearing capacity of existing NTR (new tubular roof) or STS (steel tube slab) structures. Experimental study on the bending performance and influences of following parameters are carried out: the connection type of the steel tube, the diameter and eccentricity of the small steel tube, and the thickness of the bottom steel plate. The results show that the NSTS members present progressive ductile flexural failure under concentrated load. The connection type has important effect on the mechanical behavior, and the bolts fixed T-shaped plate (B+T) connection method, which provides much higher bending stiffness, is proved to be the most reliable connection type. The increase of small steel tube diameter enhances the bending performance as expected, which also confirms the effectiveness of the B+T connection, while the tube eccentricity presents little impact on the bearing capacity. The bottom steel plate significantly improves the bearing capacity and stiffness and reduces the mid-span deflection. Furthermore, the bending capacity calculation method is proposed and the calculated values show good agreement with the test results. Also, the effect rules of the diameter-thickness ratio of the small tube, the length-diameter ratio of the member and the thickness variety of the bottom steel plate on the bending capacity of NSTS members are further investigated based on the proposed theoretical method.
-
Novel multi-scale diffusion model for catalytic methane combustion
Kai Huang,Lianguang Wang,Yang Xu,Dongfang Wu 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.5
A multi-scale model of methane catalytic combustion was built by a series of balance equations and diffusion equations, and these equations were solved through the computational fluid dynamics (CFD) software. The difference between this work and previous model is the diffusion process in catalyst coating was considered. By analyzing the methane conversion, temperature distribution and mass fraction contours of every component, the performance of multi-scale model was compared with that of the pure CFD model without diffusion. The effects of diffusion, methane concentration, flow rate on the methane conversion and temperature distribution of monolithic reactor were also evaluated and discussed by the multi-scale model. The multi-scale model showed better accuracy than the pure CFD model without diffusion process. Different methane concentrations and gas flow rates had enormous effects on the methane conversion and temperature. Therefore, it was beneficial to the reaction process to adjust the methane concentration and gas flow rate appropriately.
-
Experimental Study on Pull-Out Behavior of Wedge-Grouted Rockbolt in Wind Turbine Tower Foundation
Haiyang Gao,Lianguang Wang,Xue Li,Yaosheng Zhang 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.6
To investigate the the pull-out behaviors of wedge-grouted rockbolts and grouted rockbolts in strongly weathered and moderately weathered rocks, the rockbolts with lengths of 8.0 m, 10.5 m and 13.0 m were tested under freeze–thaw cycle and cyclic load. The test result shows that the minimum anchoring length of wedge-grouted rockbolt is less than 3.0 m and of grouted rockbolt is less than 4.0 m in the strongly weathered or moderately weathered rock. The effect of the wedge head on restricting the deformation of the rockbolt is not obvious when the anchoring length is less than 6.0 m. Freeze–thaw cycle had little effect on the stiffness and deformation of the two kinds of rockbolts. The wedge-grouted rockbolts have better deformation performance than the grouted rockbolts. The bonding force between the rockbolt and the grout or the grout and the surrounding rock is greater than the tensile strength of the rockbolt. Furthermore, the calculation models of shear stress and axial strain can provide reasonable predictions for two kinds of rockbolts, and the development trends of strain and shear stress under different pullout loads were calculated.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
