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  • 1
    Electronic Resource
    Electronic Resource
    Vertical stress distribution due to an arbitrarily shaped foundation using triangulation and an analytical expression for a triangular loaded region (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    International Journal for Numerical and Analytical Methods in Geomechanics 15 (1991), S. 51-60 
    Details
    ISSN: 0363-9061
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Notes: Using the basic Boussinesq's equation, the expression for the vertical stress distribution (σz) underneath any point on the ground surface due to a general triangular loaded region in a preferred orientation with a linearly varied loading has been successfully derived. When the triangle is not in a preferred orientation, a simple axis transformation is required and the expression will be equally applicable. Based on this expression, σz due to an arbitrarily shaped loaded foundation can simply be determined by first triangulating the loaded area and summing up the contributions from each generated triangular region. The procedures for triangulating and calculating the stress distribution can be simply automated through computer programs.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nag.1610150105
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A numerical model for wave scattering problems in infinite media due to p- and sv-wave incidences (1992)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 33 (1992), S. 1661-1682 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Based on elastic wave motion theory and the superposition concept, a numerical model for wave scattering problems in infinite media due to P-wave and SV-wave incidences is presented in this paper. Since this model is based on a coupled system of finite and infinite elements for simulating wave propagation in infinite media, the complexity of geometry and the variability of material properties in the foundation can be realistically simulated. Through a systematic study of the characteristics of a plane harmonic P-wave and SV-wave incidences on a fixed boundary, the concept of stress increase factors and stress factors which can be used to calculate the generalized stresses on the wave input boundary due to the SV-wave and P-wave incidences is also proposed. The effects of incident wave mode, incident angle and Poisson's ratio in the foundation on the stress increase factors and the stress factors have been studied in detail. Finally, the proposed model has been applied to a half-plane foundation and a semi-circular canyon to calculate SV-wave and P-wave scattering problems. The numerical results obtained show good agreement with the theoretical results and Wong's analytical results.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620330808
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  • 3
    Electronic Resource
    Electronic Resource
    Discussion on: Vertical stress distribution due to an arbitrarily shaped foundation using triangulation and an analytical expression for a triangular loaded region (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    International Journal for Numerical and Analytical Methods in Geomechanics 16 (1992), S. 377-381 
    Details
    ISSN: 0363-9061
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nag.1610160506
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  • 4
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    trans-Tetrakis[N-(adamantan-1-yl)pyridine-4-carboxamide]dichloridomanganese(II)–N-(adamantan-1-yl)pyridine-4-carboxamide (1/2) (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-03-15
    Description: The asymmetric unit of the title compound, [MnCl2(C16H20N2O)4]·2C16H20N2O, is composed of two coordinating N-(adamantan-1-yl)pyridine-4-carboxamide molecules, one Cl− anion, an MnII ion, lying on an inversion centre, and one free N-(adamantan-1-yl)pyridine-4-carboxamide molecule. The distorted octahedral Mn environment comprises two terminal Cl atoms and four monodentate N atoms from four organic ligands. All the carbamoyl N atoms are involved in intermolecular N—H...O hydrogen-bonding interactions which link the molecules into a chain along the a axis.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 5
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    4-Methylanilinium 2-carboxyacetate (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-06-03
    Description: During the formation of the title salt, C7H10N+·C3H3O4−, an H atom of a carboxyl group was transferred to the amino group. All non-H atoms of the cation are essentially coplanar [r.m.s. deviation = 0.007 (4) Å]. The mean planes of the carboxylate and carboxyl groups of the anion form a dihedral of 69.67 (1)°. In the crystal, N—H...O and O—H...O hydrogen bonds connect the anions and cations, forming a two-dimensional network parallel to the bc plane.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 6
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    4-Cyanopyridinium dihydrogen phosphate–isonicotinonitrile–phosphoric acid (1/1/1) (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-05-13
    Description: The asymmetric unit of the title compound, C6H5N2+·H2PO4−·C6H4N2·H3PO4, contains one 4-cyanopyridinium cation, one H2PO4− anion, one independent isonicotinonitrile molecule and one independent H3PO4 molecule. The dihedral angle between the mean planes of the separate protonated and unprotonated pyridine rings is 9.93 (8)°. In the crystal, N—H...O and O—H...N hydrogen bonds and weak C—H...O and C—H...N intermolecular interactions connect the organic molecules into a two-dimensional network parallel to the ac plane. O—H...O hydrogen-bonding interactions involving the H2PO4− anions and H3PO4 molecules provide additional support from the inorganic groups Weak π–π stacking interactions between the pyridine rings of neighbouring organic molecules [centroid–centroid distances = 3.711 (4) and 3.784 (2) Å] further link the layers into a three-dimensional network.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 7
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    Di-μ-chlorido-bis{bis[4-(adamantan-1-ylcarbamoyl)pyridine-κN]chloridocopper(II)} hemihydrate (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-01-15
    Description: In the centrosymmetric dimeric title compound, [Cu2Cl4(C16H20N2O)4]·0.5H2O, the CuII atom is in a distorted trigonal–bipyramidal environment defined by two bridging Cl atoms, one terminal Cl atom and two N atoms from two monodentate 4-(adamantan-1-ylcarbamoyl)pyridine ligands. The amine N atoms are involved in intramolecular N—H...O and intermolecular N—H...Cl hydrogen bonds. The latter hydrogen bonds link the complex molecules into a ribbon along [010]. The uncoordinated water molecule is 0.25-occupied.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 8
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    Allyl(ferrocenylmethyl)dimethylammonium perchlorate (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-01-22
    Description: The asymmetric unit of the title complex, [Fe(C5H5)(C11H17N)]ClO4, contains two independent allyl(ferrocenylmethyl)dimethylammonium cations and two ClO4− anions. The anions are disordered each over two sets of sites, with an occupancy ratio of 0.617 (6):0.383 (6). The distances from the Fe atoms to the centroids of the unsubstituted and substituted cyclopentadienyl (Cp) rings are 1.645 (1)/1.657 (1) and 1.644 (1)/1.647 (1) Å. The dihedral angles between the two Cp rings are 2.49 (3) and 1.45 (4)° in the two ferrocenyl groups of the cations.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 9
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    catena-Poly[4-methylmorpholin-4-ium [[dichloridobismuth(III)]-di-μ-chlorido]] (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-01-22
    Description: The asymmetric unit of the title complex, {(C5H12NO)[BiCl4]}n, contains two bridging and two cis non-bridging chloride ligands coordinated to a central BiIII atom, and one 4-methylmorpholin-4-ium cation. The BiIII atoms are linked by the bridging chloride ligands into linear chains parallel to the c axis. The chloride ions create a pseudo-octahedral geometry about each BiIII atom. Bifurcated N—H...Cl hydrogen bonds link the cations to the anionic chains.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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  • 10
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    (Ferrocenylmethyl)trimethylammonium perchlorate (2012)
    International Union of Crystallography (IUC)
    Details
    Publication Date: 2012-01-22
    Description: The asymmetric unit of the title complex, [Fe(C5H5)(C9H15N)]ClO4, contains one discrete (ferrocenylmethyl)trimethylammonium cation and one perchlorate anion. The anion is disordered over two sets of sites, with refined occupancies of 0.776 (8) and 0.224 (8). The distances from the Fe atom to the centroids of the unsubstituted and substituted cyclopentadienyl (Cp) rings are 1.650 (1) and 1.640 (1) Å, respectively. The Cp rings form a dihedral angle of 2.66 (3)°.
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography (IUC)
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