h1

TY  - THES
AU  - Görtz, Stephan
TI  - Zum Schubrissverhalten von Stahlbeton- und Spannbetonbalken aus Normal- und Hochleistungsbeton
VL  - 18]
CY  - Aachen
PB  - Lehrstuhl und Inst. für Massivbau [u.a.]
M1  - RWTH-CONV-115207
SN  - 3-9807302-8-X
T2  - [Schriftenreihe des IMB
SP  - Getr. Zählung : Ill., graph. Darst.
PY  - 2004
N1  - Aachen, Techn. Hochsch., Diss., 2004
AB  - Most of the recent research results trace back the portion of the shear capacity exceeding the truss model of Mörsch, exclusively to aggregate interlock forces. In this way, the concrete contribution is considered solely by a more flat strut inclination q and accordingly the whole shear capacity is described by a pure truss-model. In order to check this model, experimental and theoretical investigations have been caried out. First, an iterative algorithm has been developed, which is able to calculate the cracking behaviour and the load bearing behavior in the web of shear reinforced beams. The analysis with this model shows, that the whole shear capacity can’t be described by a pure truss model and consequently, an additional concrete contribution exists. Based on the theoretical results the load bearing behavior has been analyzed using 27 shear tests made of normal and high performance concrete. Innovative measurement techniques using photogrammetry have been applied to monitor the crack development. The results indicate that only in the lower stressing range a shear transfer taken by aggregate interlock is possible. With increasing shear forces, the crack edges are going to separate and the shear forces have to be transferred in the uncracked compression zone. The theoretical and experimental results are confirmed by nonlinear finite-element simulations. Based on the research results a model for shear design has been developed for prestressed and nonprestressed beams made of normal- and high performance concrete. The model has been checked using a database of about 2000 shear tests from the literature.
KW  - Stahlbeton (SWD)
KW  - Träger (SWD)
KW  - Schubbewehrung (SWD)
KW  - Querkraft (SWD)
KW  - Rissverlauf (SWD)
KW  - Spannbeton (SWD)
KW  - Hochfester Beton (SWD)
KW  - Tragfähigkeit (SWD)
KW  - Normalbeton (SWD)
LB  - PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
UR  - https://publications.rwth-aachen.de/record/53027
ER  -