In the previous paper, based on the big data of gathered crack image and load-deformation relationship of laboratory experiments, the bending-shearing critical crack method (BSCCM) has been developed to give the mechanical explanation of the punching shear phenomenon in interior slab-column connections without shear reinforcement and the analytical method could analysis the punching shear strength and deformation capacity simultaneously. Based on the big data of the gathered experiments, this paper firstly validates the accuracy of the BSCCM for the standard specimen with 45 tests data, and secondly deduces the equivalent transformation formulas for non-standard specimen through the yield line theory and verifies the applicability of the BSCCM for the non-standard specimens with 98 tests data. And on this basis, through data mining and factor analysis, this paper studies the factors that affecting the punching shear strength and deformation and proposes the simplified calculation formulas for engineering practice. At last, this paper fully validates the reasonability and accuracy of the formulas with 432 tests data. Results show that the BSCCM is applied to the calculation of punching shear strength and deformation for both standard and non-standard specimens. The simplified formulas which considered concrete strength, yield strength of steel/bar, reinforcement ratio, punching span ratio and perimeter thickness ratio of critical section can accurately and rapidly predict the punching shear strength and deformation of the slab-column connection. The conclusion can be available for engineering application and be used as the basis of the performance design of RC flat plate structure.
ACI Committee 318, Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute, Farmington Hills, MI, 2014.
2.
BartolacM., DamjanovićD. and DuvnjakI., Punching strengthof flat slabs with and without shear reinforcement, Gradevinar67 (8) (2015), 771–786.
3.
BiniciB. and BayrakO., Punching shear strengthening of reinforced concrete flat plates using carbon fiber reinforced polymers, Journal of Structural Engineering129 (9) (2003), 1173–1182.
4.
BirkleG., Punching of Flat Slabs: The Influence of Slab Thickness and Stud Layout, Department of Civil Engineering, University of Calgary, Calgary, AB, Canada, 2004.
5.
BS 8110-97, Structural use of concrete, Part 1: Code of Practice for Design and Construction, British Standards Institution, London, UK, 1997.
6.
CAN/CSA-A23.3-04 (R2010), Design of Concrete Structures, Canadian Standards Association, Rexdale, ON, Canada, 2010.
7.
CEB-FIP MC 2010, Mode Code for Concrete Structures, Wilhelm Ernst & Sohn, Berlin, Germany, 2010.
8.
CoronelliD. and CortiG., Nonlinear, static analysis of flat slab floors with grid model, ACI Structural Journal111 (2) (2014), 343–351.
9.
CriswellM.E., Static and dynamic response of reinforced concrete slab-column connections, ACI Special Publication42 (1974), 721–746.
10.
DIN 1045-1, Plain, Reinforced and Prestressed Concrete Structures-Part 1: Design and Construction, Normenausschuss Bauwesen (NABau) im DIN Deutsches Institut für Normung e. V. Beuth Verl, Berlin, 2008.
11.
ElstnerR.C. and HognestadE., Shearing strength of reinforced concrete slabs, ACI Journal Proceedings53(7) (1956), 29–58.
12.
EN 1992-1-1, Design of Concrete Structures. General rules and rules for buildings, Brussels, Belgium, 2004.
13.
GB50010-2010, Code for design of concrete structures, Beijing: China Architecture & Building Press, 2010, (in Chinese).
14.
GhannoumC.M., Effect of High-strength Concrete on the Performance of Slab-Column Specimens, McGill University Montréal, Canada, 1998.
15.
HallgrenM., Punching Shear Capacity of Reinforced High Strength Concrete Slabs, KTH Stockholm, 1996.
16.
HanJ.H. and DingZ.Q., Experimental research on punching strength of reinforced concrete slab supported on foursides, Journal of Building Structures15(6) (1994), 38–46. (in Chinese).
17.
HarajliM.H. and SoudkiK.A., Shear strengthening of interior slab-column connections using carbon fiber-reinforced polymer sheets, Journal of Composites for Construction7 (2) (2003), 145–153.
18.
HuangC.T., PuS. and DingB.B., An analytical punching shear model of RC slab-column connection based ondatabase, Journal of Intelligent & Fuzzy Systems (2017). (to be published).
19.
JSCE, Standard specification for concrete structures, Japan Society of Civil Engineering, 2012.
20.
KinnunenS., NylanderH., Punching of concrete slabs without shear reinforcement, Elander, 1960.
21.
KoppitzR., KenelA. and KellerT., Punching shear of RC flat slabs– Review of analytical models for new and strengthening of existing slabs, Engineering Structures52 (2013), 123–130.
22.
KotsovosM.D., Design for Punching of Flat Slabs, Springer International Publishing, 2014, pp. 83–107.
23.
LadnerM., Influence of the size scale for punching tests, Material and Technique2 (1973), 60–68.
24.
LiD.G., ShuZ.F. and YuZ.W., Experimental investigation of punching strength of reinforced concrete slab-columnconnections without shear reinforcement, Journal of Hunan University13(3) (1986), 22–35. (in Chinese).
25.
LinX.J., QianZ.C. and ZhengZ.Q., Deformation and strength of steel fiber high-strength concrete slabssubjected to punching shears, China Civil Engineering Journal37(12) (2005), 23–28. (inChinese).
26.
LiuL.Q., Experimental study on punching shear strength of RC slabs with the effect of column aspect ratios and flexural reinforcement ratios, China Academy of Building Research (2006). (in Chinese).
27.
ManterolaM.J., Punching of slabs without shear reinforcement, Comité EuroInternational du Béton, Bulletin d’Information, No. 57, 1966.
28.
MarzoukH. and HusseinA., Experimental investigation on the behavior of high-strength concrete slabs, ACI Structural Journal88 (6) (1992), 701–713.
29.
MatthysS. and TaerweL., Concrete slabs reinforced with FRP grids. II: Punching resistance, Journal of Composites for Construction4 (3) (2000), 154–161.
30.
McHargP.J., CookW.D., MitchellD. and YoonY.S., Benefits of concentrated slab reinforcement and steel fibers on performance of slab-column connections, ACI Structural Journal97 (2) (2000), 225–235.
31.
MoeJ., Shearing strength of reinforced concrete slabs and footings under concentrated loads, Journal of Portland Cement Association, Research and Development Laboratories, Bulletin, No. D47, 1961.
32.
MuttoniA., Punching shear strength of reinforced concrete slabs without transverse reinforcement, ACI Structural Journal105 (4) (2008), 440–450.
33.
OlmatiP., SagasetaJ., CormieD. and JonesA., Simplified reliability analysis of punching in reinforced concrete flat slab buildings under accidental actions, Engineering Structures130 (2017), 83–98.
34.
OspinaC.E., BirkleG. and Widianto, Databank of Concentric Punching Shear Tests of Two-Way Concrete Slabs without Shear Reinforcement at Interior Supports, Structures Congress 2012, ASCE, 2012, pp. 1814–1832.
35.
OzawaM., UchidaY. and KoyanagiW., Study on the process of punching shear failure of reinforced concrete slabs, Trita-BKN Bulletin57 (2000), 277–284.
36.
OzdenS., ErsoyU. and OzturanT., Punching shear tests of normal-and high-strength concrete flat plates, Canadian Journal of Civil Engineering33 (11) (2006), 1389–1400.
37.
ParkR., GambleW.L., Reinforced Concrete Slabs, 2nd. John Wiley and Sons, 1999.
38.
PengJ., Experimental study on punching shear failure of reinforced concrete slabs-column connections, Hunan University, 2013. (in Chinese).
39.
RamdaneK.E., Punching shear of high performance concrete slabs, 4th International Symposium on Utilization of High-Strength/High-Performance Concrete, Paris, 1996, pp. 1015–1026
.
40.
ReganP.E., Symmetric punching of reinforced concrete slabs, Magazine of Concrete Research38 (136) (1986), 115–128.
41.
ReineckK.H., KuchmaD.A., KimK.S. and MarxS., Shear database for reinforced concrete members without shear reinforcement, ACI Structural Journal100 (2) (2003), 240–249.
42.
RupfM., Transverse force resistance of reinforced concrete and prestressed concrete slabs by means of stress fields, ÉcolePolytechnique Fédérale de Lausanne, 2014.
43.
SchaefersU., Construction, design and safety against punching shear of internal columns, Deutscher Ausschuss für Stahlbeton, Heft 357, Berlin, 2014.
44.
SwamyR.N. and AliS.A.R., Punching shear behavior of reinforced slab-column connections made with steel fiber concrete, ACI Journal Proceedings79 (5) (1982), 392–406.
45.
UrbanT., Punching capacity in the aspect ratio of the sides of the column, Department of Civil Engineering University of Lodz, Polish, 1994.
46.
TaylorR. and HayesB., Some tests on the effect of edge restraint on punching shear in reinforced concrete slabs, Magazine of Concrete Research17 (50) (1965), 39–44.
47.
WangF., YanS. and ZhouJ.R., Test study on punching shear behaviors of unbonded pre-stressed reinforcedconcrete slab-column connections, Journal of Shenyang Arch and Civ Eng Univ20(3) (2004), 170–174. (in Chinese).
48.
WidiantoO.B. and JirsaJ.O., Two-way shear strength of slab-column connections: Reexamination of ACI 318 provisions, ACI Structural Journal106 (2) (2009), 160–170.
49.
KakutaY., ItohA. and FujitaY., Experimental study on punching strength of reinforced concrete slabs, JSCE Research Report229 (1974), 105–115. (in Japaness).
50.
ZhangY.W., Punching shear research on reinforced concrete slabs, Hunan University, 2013, (in Chinese).
51.
ZhengJ.L. and ZhengZ.Q., Research on test results of punching strength of reinforced concrete slabs, Journal of Huzhou University20(2) (1992), 65–71. (in Chinese).
