1,721,004 research outputs found
Economic aspects of interlocking hollow brick system designed for industrialized building system
No full textLimiting the sway on multi-storey un-braced steel frames bending on weak axis with partial strength connections
Full text linkThis paper investigates the design using wind-moment method for semi-rigid un-braced steel frames bending on weak axis. A limiting sway method has been proposed to reduce the frame sway. Allowance for steel section optimization between moment of inertia on minor axis column and major axis beam was used in conjunction with slope-deflection analysis to derive equations for optimum design in the proposed method. A series of un-braced steel frames comprised of two, four, and six bays ranging in height of two and four storey were studied on minor axis framing. The frames were designed for minimum gravity load in conjunction with maximum wind load and vice-versa. The accuracy of the design equation was found to be in good agreement with linear elastic computer analysis up to second order analysis. The study concluded that the adoption of wind-moment method and the proposed limiting sway method for semi-rigid steel frame bending on weak axis should be restricted to low-rise frames not more than four storey
Performance of cruciform column using universal beam sections under axial compression load
Full text linkThe main function of a column is to transfer loads by means of compressive action. The response of the column to a nominally applied load depends upon a number of factors. The most important are its length and cross-sectional shape, the strength of material, the conditions of support provided at its ends and the method of restrained to its axis. This paper presents the performance of cruciform column under axial compression load. Cruciform column, which is also known as compound members, consists of two universal beams section where one universal beam section is cut into two at the mid section of the beam and welded to the other beam section. The compression capacity tables based on the code BS5950-1:200 are developed for columns with different sections and different effective lengths. The study shows that the compression resistance of the column increases as the radius of gyration of the section increases due to the formation of cruciform column. The study also concludes that the use of cruciform column contributes to the saving of the column steel weights up to 35% compared to UC sections and up to 60% as compared to UB sections
Capacity of interlocking stub column with cement mortar infill under axial compression load
Full text linkThis paper presents an experimental investigation on interlocking stub column with cement mortar infill subjected to axial compression load. The interlocking stub column is produced by using load bearing interlocking blocks arranged in vertical direction to form a square shaped column section. The objective of this study is to investigate the compression capacity and failure mode of the column. Six specimens were tested in this study under axial compression load using universal testing machine. From the experiments, all specimens failed in crushing of interlocking blocks. The ultimate load carrying capacity for all tested specimens are in the range of 461.6kN to 577.6kN
Flexural performance of cold-formed steel section in a composite beam system
Full text linkThe application of Cold-Formed Steel (CFS) as a structural member in buildings as composite associate was rarely demonstrated due to limited technical information available about its usage in the system, despite the prospects of the CFS section in the composite system of construction in buildings as well as in light weight industrial applications as nowadays proven. Therefore, this paper aimed at demonstrating the potentials of using CFS section as a structural member in a composite beam system. Four-point bending test was used to determine the flexural strength capacities of the composite system. Results of flexural tests conducted on the composite specimens incorporating the CFS coupled with bolted shear connector proved it to be structurally feasible. In conclusion, the CFS can be employed as a structural member to eliminate the use of Hot Rolled Steel (HRS) section in small and medium size buildings and in lightweight industrial composite constructions as demonstrated
Typical tests on cold-formed steel structures
Full text linkCold-formed steel has been recently brought into Malaysian construction. It is a steelwork technology that has high potential to be developed in Malaysia, that can offers advantages such as fast erection, lightweight, clean and easier construction. This paper reported a series of research studies carried out in UTM for locally produced coldformed steel sections and roof truss system. The research work included study on the member capacities for lipped C-section and Hat-section, a full-scale test for roof truss system and the cold-formed steel tek-screw connection capacities. All the studies were based on the requirements of British Standard BS 5950 Part 5 1998. The actual capacities of the proposed sections were ratio from 1.09 - 2.21 compared to the design strength. The full-scale experimental test on roof truss also achieved two times of the estimated design capacities. The tek-screw connection capacities in resistance to shear force and pull-out force ranged 76% - 141% higher than the design requirements. The connection also withstand 10000 times of dynamic load that verified its performance in long-term serviceability. The results of the experimental tests on the proposed cold-formed steel section and roof truss system showed good agreement to the requirements of BS5950 Part 5 1998
Can cold-formed steel section be use as a sustainable structural member in building and civil engineering constructions? A mini review
Full text linkCold-Formed Steel (CFS) section for several decades was not considered as a structural member in building and civil engineering constructions due to inadequate technical information available about its usage, despite the potentials it demonstrated as proven by current research studies. Therefore, this paper aimed at demonstrating the structural capability of CFS section as a sustainable structural member in building and civil engineering constructions. Some research studies conducted reported in this paper shows the possibility of CFS section to be utilized as a structural member in the construction industries. Results from the research studies reported shows that flexural capacities were found to be increased when the CFS section was integrated compositely. In conclusion, and as demonstrated in this paper based on the studies reported, the CFS section can be employed as a sustainable structural member in small and medium size buildings, civil engineering and in lightweight industrial constructions
Engineering properties of bio-inspired cement mortar containing seashell powder
Full text linkCement mortar is a semi liquid formed by a composite of cement, sand and water. Generally, cement mortar is used as a medium for bricks laying in construction. Nowadays, the properties of various types of waste materials are studied as construction material in buildings such as blast furnace ash, fly ash and palm oil fuel ash. In this study, the seashell is used as a replacement of building material in cement mortar.Seashell consists of high amount of calcium carbonate that provides remarkable mechanical properties and suitable to be used as building material. The engineering properties of cement mortar is studied, which including the compressive strength, flexural strength, splitting tensile strength, durability, modulus of elasticity in compression, setting time, water absorption and shrinkage. Cockle (Anadaragranosa) and mussel (Pernaviridis) are selected to replace the sand in the cement mortar with a ratio of 0, 25, 50, 75, and 100 percent by total weight of sand. A total number of 2800samples are prepared and tested up to 1 year and subjected to four exposure conditions, which are water, air, natural weather and wet-dry cycle.The replacement of seashell in cement mortar is likely to increase its engineering properties especially compressive strength due to high amount of calcium carbonate.The replacement of seashell in cement mortar will reduce the construction cost, improve the engineering properties of mortar and can be applied in various mortar applications
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