Non-planar beam-wall joints in tall building structures

Stress concentration and local deformation occur at both coplanar and non-planar beam-wall joints. However, over the years, only coplanar joints have been studied in detail. Very few studies on non-planar joints have been carried out and most designers still treat non-planar joints as hinges and neglect the possible coupling effect of beams connected to such joints. There is also no established method for detailed design of non-planar joints. Herein, a parametric study of the behaviour of non-planar beam-wall joints using finite-element analysis is described. On the basis of numerical results, a simple equivalent-frame model is developed. Examples are given to illustrate its applications and the results show that the coupling effect of beams connected to non-planar joints can be very substantial. Moreover, in order to avoid cracking at the joints, it is proposed that in the detailed design (a) the concentrated out-of-plane moment acting from the beam on the wall should be catered for by designing a vertical strip of the wall, having a width as determined in the present study, as a column to resist such a moment; and (b) the bending moment induced in the beam should be properly allowed for and the longitudinal reinforcement so provided adequately anchored into the wall. | Stress concentration and local deformation occur at both coplanar and non-planar beam-wall joints. However, over the years, only coplanar joints have been studied in detail. Very few studies on non-planar joints have been carried out and most designers still treat non-planar joints as hinges and neglect the possible coupling effect of beams connected to such joints. There is also no established method for detailed design of non-planar joints. Herein, a parametric study of the behaviour of non-planar beam-wall joints using finite-element analysis is described. On the basis of numerical results, a simple equivalent-frame model is developed. Examples are given to illustrate its applications and the results show that the coupling effect of beams connected to non-planar joints can be very substantial. Moreover, in order to avoid cracking at the joints, it is proposed that in the detailed design (a) the concentrated out-of-plane moment acting from the beam on the wall should be catered for by designing a vertical strip of the wall, having a width as determined in the present study, as a column to resist such a moment; and (b) the bending moment induced in the beam should be properly allowed for and the longitudinal reinforcement so provided adequately anchored into the wall.published_or_final_versio

Further validation of the Chinese version of the Level of Expressed Emotion Scale for research and clinical use

2009-2010 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

2-Hydroxy-3-(p-nitrobenzenesulfonylamino)propylammonium p-nitrobenzenesulfonate

The title compound, [NO2C6H4SO2NHCH2CHOHCH2NH3]+- [p-NO2C6H4SO3]ÿ or C9H14N3O5S+ C6H4NO5Sÿ, was isolated from the reaction between 1,3-diamino-2-hydroxypropane and p-nitrobenzenesulfonyl chloride in CH2Cl2. The fairly extensive hydrogen-bond system involving all `active' H atoms links the ions in the crystal into layers normal to the b axis.published_or_final_versio

Preconcentration of Trace Metal Ions Using Freshwater Algae for Inductively Coupled Plasma - Mass Spectrometry

published_or_final_versio

Dynamic bin packing of unit fractions items

LNCS v. 3580 entitled: Automata, Languages and Programming: 32nd International Colloquium, ICALP 2005, Lisbon, Portugal, July 11-15, 2005. ProceedingsThis paper studies the dynamic bin packing problem, in which items arrive and depart at arbitrary time. We want to pack a sequence of unit fractions items (i.e., items with sizes 1/ω for some integer w ≥ 1) into unit-size bins such that the maximum number of bins used over all time is minimized. Tight and almost-tight performance bounds are found for the family of any-fit algorithms, including first-fit, best-fit, and worst-fit. We show that the competitive ratio of best-fit and worst-fit is 3, which is tight, and the competitive ratio of first-fit lies between 2.45 and 2.4985. We also show that no on-line algorithm is better than 2.428-competitive. This result improves the lower bound of dynamic bin packing problem even for general items. © Springer-Verlag Berlin Heidelberg 2005.postprin

Dichloro[(1R,2R)-N-(2-pyridylmethylene)-1,2-cyclohexanediamine]copper(II)

The crystal structure of [CuC12(CI2Hi7N3)], containing a five-coordinate Cu n atom with distorted trigonalbipyramidal coordination, is reported. The absolute configuration (1R,2R) has been verified.published_or_final_versio

Linear-time haplotype inference on pedigrees without recombinations and mating loops

In this paper, an optimal linear-time algorithm is presented to solve the haplotype inference problem for pedigree data when there are no recombinations and the pedigree has no mating loops. The approach is based on the use of graphs to capture SNP, Mendelian, and parity constraints of the given pedigree. This representation allows us to capture the constraints as the edges in a graph, rather than as a system of linear equations as in previous approaches. Graph traversals are then used to resolve the parity of these edges, resulting in an optimal running time. © 2009 Society for Industrial and Applied Mathematics.published_or_final_versio

Exception handling in distributed workflow systems using mobile agents

2005-2006 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe

Testing the psychometric properties of a Chinese version of the level of expressed emotion scale

Author name used in this publication: Wai Tong ChienAuthor name used in this publication: Zenobia Chung-Yee Chan2013-2014 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

The Role of Connexins in Wound Healing and Repair: Novel Therapeutic Approaches

Gap junctions are intercellular proteins responsible for mediating both electrical and biochemical coupling through the exchange of ions, second messengers and small metabolites. They consist of two connexons, with (one) connexon supplied by each cell. A connexon is a hexamer of connexins and currently more than 20 connexin isoforms have been described in the literature thus far. Connexins have a short half-life, and therefore gap junction remodeling constantly occurs with a high turnover rate. Post-translational modification, such as phosphorylation, can modify their channel activities. In this article, the roles of connexins in wound healing and repair are reviewed. Novel strategies for modulating the function or expression of connexins, such as the use of antisense technology, synthetic mimetic peptides and bioactive materials for the treatment of skin wounds, diabetic and pressure ulcers as well as cornea wounds, are considered.GT received a BBSRC Doctoral Training Award at the University of Cambridge and thanks The Croucher Foundation for supporting his clinical assistant professorship. YC is supported by the ESRC for her research at the University of Cambridge