Testing and evaluation of reinforced concrete beam-column-slab joint

Eksperimentalno istraživanje seizmičkog ponašanja identičnih podsklopova greda-stup obavljeno je ispitivanjem dvaju modela spoja u mjerilu 1:2, pri čemu jedan model ima ploču, a drugi nema. Kvalitativni model kojim se simulira sudjelovanje međukatne ploče razvijen je uspostavljanjem obrazaca pojave pukotina u ploči (linija popuštanja) i stanja deformacije u armaturi ploče. Na bazi kontrolnih rezultata zaključeno je da model spoja dovodi do boljeg predviđanja seizmičkog ponašanja te da taj model omogućava eksplicitno ocjenjivanje djelovanja ploče na spoj.An experimental investigation of seismic behaviour of identical beam-column subassemblies was conducted by testing two half-scale joint models: one without a slab and the other with a slab. A qualitative model simulating participation of the floor slab was developed by establishing the slab crack patterns (yield lines) and the state of strain in slab bars. Based on the verification results, it was concluded that the joint model improves prediction of seismic behaviour, and that this model allows explicit evaluation of the slab effect on the joint

Performance Assessment of an Existing Reinforced Cement Concrete T-Beam and Slab Bridge Using Pushover Analysis

The objective of this paper is to evaluate the structural condition of an existing reinforced cement concrete T-beam and slab bridge and to check its survivability under two imposed ground motions. A three dimensional finite element model of the bridge was developed using Structural Analysis and Program Software SAP2000. The finite element model of the bridge was subjected to ground motions along the transverse and longitudinal directions. A nonlinear static pushover analysis was carried out and the capacity curves were obtained. The seismic demands and the capacities were established. The performance of the bridge was assessed and the results are reported

1-[6-(1H-Indol-1-yl)pyridin-2-yl]-1H-indole-3-carbaldehyde

In the title compound, C22H15N3O, the dihedral angle between the two indole units is 33.72 (3)°. The molecular structure features a weak intramolecular C—H...N interaction. In the crystal, weak C—H...O and C—H...π interactions, forming a two-dimensional network parallel to the bc plane

9-[4-(Azidomethyl)phenyl]-9H-carbazole-3-carbonitrile

In the title compound C20H13N5, the dihedral angle between the carbazole ring system (r.m.s. deviation = 0.027 Å) and the pendant benzene ring is 55.08 (6)°. One of the azide N atoms is disordered over two positions in a 0.65 (2):0.35 (2) ratio. In the crystal, aromatic π–π stacking is observed [minimum centroid–centroid separation = 3.6499 (13) Å] as well as inversion-dimers connected by pairs of weak C—H...π interactions

2-Bromo-1-(1-phenylsulfonyl-1H-indol-3-yl)propan-1-one

In the title compound, C17H14BrNO3S, the phenyl ring makes a dihedral angle of 89.78 (16)° with the plane of the indole ring system. The terminal Br atom and the methyl group are disordered over two sets of sites, with site occupancies of 0.860 (2) and 0.140 (2). In the crystal, molecules are linked into a chain along the b-axis direction by weak C—H...O hydrogen bonds. The chains are further linked by C—H...π interactions, forming layers parallel to the bc plane