195 research outputs found
THE EMERGENCE OF WESTERN ISLAMIC CHILDREN’S LITERATURE
No full textThis article discusses the emergence of Islamic children’s literature and identifies a paradigm shift giving rise to religious and cultural hybridity. It reflects on the initial avoidance of Muslim publishing houses to produce Islamic fiction. The article further outlines the reasons why Islamic children’s literature is now slowly gaining momentum. Definitions of Islamic children’s fiction have been included to allow an understanding of how this genre may differ from other forms of children’s literature. Additionally, the article seeks to highlight the obscure position of Islamic children’s literature with the hope that stakeholders within the international community will begin to provide an academic space for its study
A common fixed point theorem of weak contraction mappings on partially ordered quasi metric space
No full textDetermination of creep behaviour of concrete made by brick chips in Bangladesh
No full textConcrete made of brick chips as coarse aggregate are extensively used in Bangladesh for construction of different types of structures from residential and commercial buildings to industrial complex. As creep is influenced among many factors including the constituents’ materials, relative humidity and temperature, it is essential to examine the creep behavior for Bangladeshi brick chips made concrete in Bangladeshi environment. In this work, investigation on the behaviour of creep in\ud
concrete of same grade made with brick chips collected from various locations under single stage loading was done. With these investigations, a formula was derived to get theoretical creep values for 24 MPa brick chips made concrete in Bangladeshi environment
Bond performance of CFRP strengthened steel members subjected to axial compression
No full textThis paper focuses on the use of externally bonded Carbon Fiber Reinforced Polymer (CFRP) materials to strengthen steel plates subjected to compression. A fully slender steel section was selected in this test programme. CFRP strengthened steel plates and non strengthened plates were tested to fail under compressive load. The middle part of the strut was strengthened using CFRP sheet. The length of the strengthened zone was varied. Eight specimens were tested in this test programme. The test results showed a significant strength gain of 47% and delaying of lateral torsional buckling failure mode of strengthened members. This study confirms that there is great potential to increase the short term performance of CFRP strengthened steel structure under axial compression
Experimental Study of crack propagation in carbon steel using acoustic emission
No full textAcoustic emission technique has become a significant and powerful structural health monitoring tool for structures. Researches to date have been done on crack location, fatigue crack propagation in materials and severity assessment of failure using acoustic emission technique. Determining severity of failure in steel structures using acoustic emission technique is still a challenge to accurately determine the relationship between the severity of crack propagation and acoustic emission activities. In this study three point bending test on low carbon steel samples along with acoustic emission technique have been used to determine crack propagation and severity. A notch is introduced at the tension face of the loading point to the samples to initiate the crack. The results show that the percentage of load drop of the steel specimen has a reciprocal relationship with the crack opening i.e. crack opening zones are influenced by the loading rate. In post yielding region, common acoustic emission signal parameters such as, signal strength, energy and amplitudes are found to be higher than those at pre-yielding and at yielding
Some coupled coincidence point results without compatibility
No full textIn this article, without using the notion of compatible mappings, we prove
the existence and uniqueness of coupled coincidence points for mixed gmonotone
mappings in the setting of partially ordered metric spaces,
these results improve and generalize some well-known results in the literature
Experimental Investigation on Long-term Axial Creep Performance of Pine, Spotted Gum and Laminated Veneer Lumber
No full textRecent changes to the Building Code of Australia (2016), which allow timber buildings up to 25 meters (approximately eight storeys), have effectively opened a market for mid-rise timber construction of the light timber framing kind. Whilst a few studies have been conducted on the long-term creep behavior of timber subjected to bending (Pecenko, Hozjan, Pazlar & Turk 2012; Mohager & Toratti 1992; Zhou, Fushitani, Kubo & Ozawa 1991), research on the long-term effects of axial creep, which is relevant for mid-rise timber-framed buildings, is scarce. There is, therefore, a need to understand the fundamental long-term mechanical behavior of Australian timber species, engineered wood products (EWPs), and timber-framed systems subjected to axial loading to accurately model long-term creep effects. With this in mind, a base-line experimental investigation has been conducted to understand the long-term axial creep characteristics of different Australian wood species and EWPs, to better understand creep in mid-rise timber buildings.Full Tex
Mechanical Behaviour of Timber-Steel Composite Connection Systems
No full textAlthough timber is an ideal building material offering significant structural, environmental, and economic advantages, restrictions on the supply of high-quality timber is a limiting factor for the construction industry. To manage this problem, this study investigated an innovative approach to develop a sustainable and economical composite section with improved structural performance by combining low-grade timber and steel using advanced manufacturing technologies. In this paper, 20 specimens with 2 different configurations of this novel adhesive-free Timber-Steel Composite (TSC) connection system were designed, manufactured, and tested. By conducting standard pull-out tests on these new types of composite systems, the influences of factors such as type, pattern and spacing of the fasteners on the shear performance of these systems were evaluated and discussed. Test results demonstrated a significant difference between failure mode and nonlinear behaviour of nailed and screwed TSC connections. Screwed TSC connections showed on average 40% more shear capacity but 12% less stiffness compared to nailed TSC connections. A FE model of this composite system was developed and verified against test results. The FE model could accurately predict the nonlinear load-slip behaviour of this composite system. This model will be used in further work to develop an optimised full-scale TSC beam.No Full Tex
Durability study of CFRP strengthened steel circular hollow section members under marine environment
No full textGalvanic corrosion is a common phenomenon in Carbon Fibre Reinforced Polymer (CFRP) strengthened steel structures in wet environments and submerged conditions, which reduces durability by weakening the bond between the CFRP and steel substrate. CFRP materials have already been proven to have superior resistance to corrosion and chemical attacks but the adhesive and steel are generally affected by long-term exposure to moisture, especially in conjunction with salts resulting from deicing of ocean spray. This paper presents the results of a research program to improve the durability of CFRP strengthened steel circular hollow section (CHS) members by treating the steel surface with an epoxy based adhesion promoter and inserting Glass Fibre Reinforced Polymer (GFRP) as a galvanic corrosion barrier against simulated sea water. It also presents the effects of accelerated corrosion on the bond of CFRP strengthened hollow steel members. The program consisted of four CFRP strengthened steel beams and one unstrengthened steel beam. Two strengthened beams were used as control while the other two beams were exposed to a highly corrosive environment to induce accelerated corrosion. The corrosion rate was considered 10% which represents a moderate level of loss in the cross-sectional area of the steel tube throughout its intended service life. The beams were then loaded to failure under four-point bending. The research findings indicate that the accelerated corrosion adversely affected the ultimate strength of the conditioned beams and the embedded glass fibre enhanced the bond durability
Investigation into the bond between CFRP and steel plates
No full textThe use of externally bonded Carbon Fiber
Reinforced Polymer (CFRP) reinforcement has proven to be an
effective technique to strengthen steel structures. An experimental
study on CFRP bonded steel plate with double strap joint has been
conducted and specimens are tested under tensile loadings. An
empirical model has been developed using stress-based approach to
predict ultimate capacity of the CFRP bonded steel structure. The
results from the model are comparable with the experimental result
with a reasonable accuracy
- …
