Papers by Keyword: Glubam

Abstract: Prefabricated light-frame bamboo trusses are widely used in light-frame construction as the main vertical load-carrying elements in roof and floor systems because of their long-span capabilities, ease of use, versatile configuration, rapid installation, and competitive cost. This paper presents experimental studies on glue-laminated bamboo trusses. Six full-scale model trusses with two types of configuration and sizes were tested to failure under gradually increased vertical load. The failure of the model trusses was caused by lateral buckling of the top chords. Tests show that the modern glue-laminated bamboo trusses have adequate stiffness and strength.

Abstract: Glubam is a kind of environmentally friendly and energy efficient composite material in civil engineering developed in recent years. But the mechanical performance after subjected aging under the outdoor conditions is a blank of research field. In this paper, a new artificial accelerated aging test method and equipment for glubam have been presented by authors. The basic material performance, including deformation changing, tensile properties, compressive properties, bending properties and internal bonding strength, are tested according to the equivalent aging duration of 120 days, 240 days, 480 days and 960 days. The failure mode of specimens shows that delamination of glubam caused by dry wet circulation is the main reason for mechanical properties degradation. All test results present monotone decreasing trend and the internal bonding strength is the most sensitive to aging duration. Aging influence factor β, internal bonding correlation coefficient η and internal correlation coefficient θ can be used to evaluate aging performance of glubam, but the accuracy of evaluation results need further research.

Abstract: Glubam is a new construction material and glubam bolted joints have been developed in modern bamboo structures. To observe the performance of bolted joint, two major groups of glubam-single-bolted-joint specimens with double steel side plates are tested. Bearing strength and failure mode are analyzed and discussed. It is shown that specimens with tension parallel to bamboo fiber always yield by shearing out and showed higher bearing strength as well as better ductility, while specimens with tension perpendicular to bamboo fiber will fail by net tension. Results of bearing strength are evaluated by the 5% off-set method. At the end, equations obtained from test data and analysis about yielding strength of glubam bolted joint was obtained for following study and project design.

Abstract: Three simply supported glue laminated bamboo (glubam), lengthened from bamboo veneer plate with glued and pressed techniques during the process of manufacture, under static experiments compare to three of fatigue experiments to analyze the fatigue damage on the stiffness and strength of bamboo elements followed by modal analysis in method of the integrated modal parameter estimator LMS PloyMax. The main outcomes of the experiments were: (1) fatigue experiment reduced the bearing capacity of glubam beams approximately by 10% due to the weakness of finger-joint and fatigued gluing; (2) when the upper value of cyclic load not surpassed its design value, there were no distinct reduction on the stiffness of specimens comparing to the static group that proved the applicability and validity of the fatigue design value; (3) Excellent flexibility of bamboo contributed to the fine stability of glubam beams in aspect of dynamic response during the fatigue loading. This paper provides an attempting experimental research as the fundamental work and reference for deeper results in the future.

Abstract: Based on the practice of the landscape sketch bamboo buildings of Meixi Lake in Changsha, this thesis, from the perspective of material construction, aims to perceive the region and bamboo structure, to concern the bamboo frame form and space construction, to try to integrate bamboo structure with other materials and to explore the formation of bamboo-framed building and the related regional expression. Excavating bamboo value, improving bamboo performance and developing bamboo structural building can satisfy requirements as the main part of construction and expression in architecture and promote the using level of GluBam. Technological innovation such as suitable construction skills and reasonable structural system can promote the effective utilizing bamboo and development of modern bamboo structure. It is a alternative green building system for sustainable development.

Abstract: Bamboo is an ancient building material, but it is rarely applied in the modern buildings nowadays. The German-Chinese House in EXPO 2010 Shanghai China is mainly made up of bamboo members; it fully demonstrates the ideas of sustainable development and environmental protection. The 8m high pavilion is a two-storey building which is 25m long and 10m wide, and its first floor is 250 m² and second floor is 80 m². The exterior structure of the pavilion is made up of 96 JULONG bamboo canes whose diameter is approximately 200mm, and the inner two storey structure is made up of glubam beams and columns which have a section of 300mmX400mm. Obviously the designer had applied both the good compression capability of the pure bamboo canes and the excellent bending capability of the glubam members in this structure. As there is no bearing capacity data of the glubam, several tests for the glubam members had been carried and thus a lot of useful data had been got, therefore some structure analysis had been done. It indicates that glubam is a good structural material, and as a friendly environmentally building material, it can be widely applied in building engineering.[