Effects of un-bonded deviators on the out-of-plane buckling of steel H-beams pre-stressed by a straight tendon cable

Kim, Moon-Young; Nanzad, Nemekhbayar; Hayat, Umar

doi:10.1016/j.engstruct.2020.110566

Cited by 14 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, second-order effects are not negligible when transverse vibrations are induced: a decrement in posttensioning force (N0x,aver) of 100 kN corresponds to an increment in f1,exp of ≈ 0.18 Hz. By contrast, when the cables are in contact with the section or draped with a deviator [43,45,46], its use as a parameter was made doubtful: a decrement in N0x,aver of 100 kN corresponds to an increment in f1,exp of 0.03 Hz.…”

Section: Comparison With the Fe Model Proposed By Jaiswal Including S...mentioning

confidence: 99%

“…12), because of a stiffening effect due to the formation of rotational elastic conditions in the cables at the RHS ends. Notably, post-tensioned thin-walled steel-girder-bridges draped with a deviator [43,45,46] almost never experience critical buckling phenomena [Fig. 7(b)] as commonly happened in PC girder-bridges [17].…”

Section: Relationship Between Free Transverse Vibration and Critical ...mentioning

confidence: 99%

See 1 more Smart Citation

Vibration of prestressed beams: Experimental and finite-element analysis of post–tensioned thin-walled box-girders

Bonopera¹,

Chang

Tullini

2023

Journal of Constructional Steel Research

View full text Add to dashboard Cite

Section: Comparison With the Fe Model Proposed By Jaiswal Including S...mentioning

confidence: 99%

Section: Relationship Between Free Transverse Vibration and Critical ...mentioning

confidence: 99%

Vibration of prestressed beams: Experimental and finite-element analysis of post–tensioned thin-walled box-girders

Bonopera¹,

Chang

Tullini

2023

Journal of Constructional Steel Research

View full text Add to dashboard Cite

“…Previous research, as gleaned from these studies, predominantly targeted common structural elements such as beams [ 2 , [20] , [21] , [22] , [23] ], columns [ 6 , 12 , [24] , [25] , [26] ], bridges [ 10 , [27] , [28] , [29] ], slabs [ 21 , [30] , [31] , [32] ], and nuclear containment structures [ [33] , [34] , [35] , [36] , [37] ]. Notably, there were limited investigations into the application of tendons in special structural components like walls [ 38 ], towers [ 39 ], tunnels [ 40 ], and frames [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

Performances and properties of steel and composite prestressed tendons – A review

Rafieizonooz,

Jang,

Kim

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…With this technology, it is viable to maintain the integrity of surrounding rocks by improving the initial strength of the support system, so as to avoid the occurrence of harmful deformation in surrounding rocks to the greatest extent. ② Truss-cable combined support technology 13 , 14 . The bolt support is only capable of providing radial force to the anchored rock mass, without the provision of tangential force.…”

Section: Introductionmentioning

confidence: 99%

Model experiment research on HPTL anchoring technology for coal-rock composite roof in deep roadway

Xie

Zhang

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Since the western region of China, which is typical of extraordinary resource endowments, has gradually emerged as the major mining zone in China, the mining of thick coal seams and roadways with coal-rock composite roof have become more and more common in this region. However, it is extremely difficult to realize safe and effective maintenance and control of such roadways due to the differences in natural endowments of coal-rock masses. With the roadway with coal-rock composite roof of Hulusu Coal Mine in western China as the engineering background, experiment research on large-scale similarity model was conducted through comprehensive measures such as the pneumatic loading system, the surrounding rock stress monitoring system, the roadway deformation monitoring system, the bolt load monitoring system, and the displacement field monitoring system in this paper. According to the results of the experiment, the control effects of the three support systems on the roadway with coal-rock composite roof were significantly different. When the single support of short anchor bolts was applied, the comparatively low initial anchor-hold failed to constrain the initial micro deformation of the roof. Consequently, wide-range fractures of the roof were triggered at a loading pressure of 0.8 MPa. In the meanwhile, the deep surrounding rocks witnessed a downward inflection point in stress, accompanied by the possibility of the collapse of the thin-layer anchorage zone at any time. As for the support combining both short anchor bolts and long anchor cables, though a reinforced effect on the bolt anchorage zone could be achieved with the help of the cables, the active reinforcement capacity of the bolt was limited. The bolt anchorage zone was the first to be damaged at a loading pressure of 0.9 MPa, which would subsequently affect the effective bearing capacity of the deep surrounding rocks. In the application of the single support of high-strength long anchor bolts, the long bolts with high pre-tightening force were able to lock multiple groups of coal-rock strata to form a thick-layer anchorage bearing structure capable of withstanding a load as high as 1.0 MPa. The crash and collapse of the coal wall eventually caused the subsidence of the roof. Based on the intense dynamic load experiment and the feedbacks of engineering application outcomes in the field, it was concluded that the high-pretension thick-layer (HPTL) anchoring technology can effectively constrain the deformation of roadways with coal-rock composite roof with favorable application outcomes.

show abstract

Effects of un-bonded deviators on the out-of-plane buckling of steel H-beams pre-stressed by a straight tendon cable

Cited by 14 publications

References 11 publications

Vibration of prestressed beams: Experimental and finite-element analysis of post–tensioned thin-walled box-girders

Vibration of prestressed beams: Experimental and finite-element analysis of post–tensioned thin-walled box-girders

Performances and properties of steel and composite prestressed tendons – A review

Model experiment research on HPTL anchoring technology for coal-rock composite roof in deep roadway

Contact Info

Product

Resources

About