TY - JOUR
T1 - Punching behaviour of RC flat slabs under reversed horizontal cyclic loading
AU - Almeida, André F O
AU - Inácio, Micael M G
AU - Lúcio, Válter J G
AU - Ramos, António Pinho
N1 - Sem PDF.
PY - 2016/6/15
Y1 - 2016/6/15
N2 - The aim of this work is to study the behaviour of reinforced concrete flat slab structures under combined vertical and horizontal cyclic loading. A total of five specimens were cast and tested: a control specimen was punched without eccentricity, one specimen was tested under constant vertical loading and monotonically increased eccentricity until failure and the remaining three were tested under constant vertical load, at different shear ratios, and cyclic horizontal loading with increasing horizontal drift ratios. All slabs were similar, measuring 4.25 × 1.85 × 0.15 m3. The reinforced concrete slab specimens were connected to two steel half columns by 0.25 × 0.25 m2 rigid steel plates, prestressed against the slab using steel bolts, to ensure monolithic behaviour. The cyclic tests were performed using an innovative test setup that allows bending moment redistribution, line of inflection mobility, assures equal vertical displacements at the North-South borders and symmetrical shear forces. Results show that cyclic horizontal actions are very harmful to the slab-column connection, resulting in low horizontal drifts and energy dissipation.
AB - The aim of this work is to study the behaviour of reinforced concrete flat slab structures under combined vertical and horizontal cyclic loading. A total of five specimens were cast and tested: a control specimen was punched without eccentricity, one specimen was tested under constant vertical loading and monotonically increased eccentricity until failure and the remaining three were tested under constant vertical load, at different shear ratios, and cyclic horizontal loading with increasing horizontal drift ratios. All slabs were similar, measuring 4.25 × 1.85 × 0.15 m3. The reinforced concrete slab specimens were connected to two steel half columns by 0.25 × 0.25 m2 rigid steel plates, prestressed against the slab using steel bolts, to ensure monolithic behaviour. The cyclic tests were performed using an innovative test setup that allows bending moment redistribution, line of inflection mobility, assures equal vertical displacements at the North-South borders and symmetrical shear forces. Results show that cyclic horizontal actions are very harmful to the slab-column connection, resulting in low horizontal drifts and energy dissipation.
KW - Cyclic horizontal action
KW - Flat slab
KW - Punching
UR - http://www.scopus.com/inward/record.url?scp=84962596870&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2016.03.007
DO - 10.1016/j.engstruct.2016.03.007
M3 - Article
AN - SCOPUS:84962596870
VL - 117
SP - 204
EP - 219
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
ER -