Theoretical Study of the Mechanical Behavior of Steel-Concrete Composite Beams under Uniform Load

The unbonded prestressed concrete slabs is usually used in big span high-rise buildings. Due to the existence of stairs, elevators, piping shafts and washroom etc，（hole drilling is usually encountered in the floor of unbonded prestressed concrete structures）, which weakens the rigidity of concrete slab, and it has different influences on the slabs with openings in different locations. Based on the contrast experiments of the unbonded prestressed concrete slab with openings in different locations subjected to uniform load, this thesis investigates and analyzes mechanical behavior of the unbonded prestressed concrete slabs with openings in different locations (central，around edge and corner) subjected to uniform load. Using the yield-line theory to calculate the ultimate bearing capacity of pre-stressed slabs with openings, and comparing from experimental results to theoretical ones, this paper puts forward some conclusions of how different opening locations impact the ultimate bearing capacity of pre-stressed slabs with openings

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Mechanical behavior of connections for glubam-concrete composite beams

Construction and Building Materials ◽

10.1016/j.conbuildmat.2017.03.136 ◽

2017 ◽

Vol 143 ◽

pp. 158-168 ◽

Cited By ~ 16

Author(s):

B. Shan ◽

Y. Xiao ◽

W.L. Zhang ◽

B. Liu

Keyword(s):

Mechanical Behavior ◽

Composite Beams

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Mechanical Behavior Analysis of the Unbonded Prestressed Concrete Slabs with Openings Strengthened by Different Methods

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.1354 ◽

2010 ◽

Vol 163-167 ◽

pp. 1354-1358

Author(s):

Xia Cao ◽

Ling Zhi Jin ◽

Qiang Fu ◽

Hong Mei Zhou ◽

Ya Qiong Liu ◽

...

Keyword(s):

Experimental Data ◽

Mechanical Behavior ◽

Bearing Capacity ◽

Prestressed Concrete ◽

Concrete Slabs ◽

Uniform Load ◽

Yield Line ◽

Yield Line Theory ◽

Line Theory ◽

Lift Off

Based on the contrast experiments of unbonded prestressed concrete slabs with openings subjected to uniform load strengthened by different methods, this paper investigates and analyzes the appearance and the development of cracks, deflections, bearing capacity of the unbonded prestressed concrete slabs that are with strengthening steel and with hidden beams. According to the experimental failure mode of the slabs, prestressed concrete slabs with openings by yield line theory considering the conditions to enhance the contribution of hidden beam and the strengthening steel. Compared with the experimental data, this paper puts forward some bearing capacity lift-off effect of the slabs under different strengthened methods.

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