A simulation-based procedure was adopted to generate fragility curves for five Chinese code-conforming reinforced concrete (RC) frame structures with increasing design-based earthquake (DBE) intensities. Two important...
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In order to reduce the semi prefabricated RC frame component weight,improving the ductility and durability of RC components,the U shape ultra high performance cementitious composites shell with combines toughening by ...
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In order to reduce the semi prefabricated RC frame component weight,improving the ductility and durability of RC components,the U shape ultra high performance cementitious composites shell with combines toughening by steel wire mesh and steel fibre is used in the permanent formwork design and a new type of reinforced concrete composite beam is *** order to investigate the influence of U shape UHPCC permanent formwork on bending behaviour of reinforced concrete beams,this paper carried out large scale bending test of the reinforced concrete with U type UHPCC permanent formwork and the bending test of contrast reinforced concrete beam is carried out *** to the test results,the effects of the U shape UHPCC permanent formwork on the flexural behaviours and failure mode of the reinforced concrete beams are studied.
In this paper, the mechanical property of damaged concrete after impact was investigated. Firstly, the specimen was crushed by using drop hammer impact test machine in order to cause initial damage. Then compression-a...
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In this paper, the mechanical property of damaged concrete after impact was investigated. Firstly, the specimen was crushed by using drop hammer impact test machine in order to cause initial damage. Then compression-after-impact tests were carried out to examine and compare the damage responses of the specimens, and some stress-strain curves of the specimens under different damage degrees were obtained. Test parameters, such as the strength grade, height of the fall and drop weight were studied. The damage behaviors of the 24 tested specimens with the acquired UT (ultrasonic test) data were analyzed. The experiment results indicate that using UT to test the damage of concrete is highly sensitive;Concrete elastic modulus and compressive strength after impact are reduced. Brittle fracture of the concrete specimen after impact is remarkable.
Small-diameter round timber is a forestry by-product mainly from thinning of the artificial forest. It is not suitable for direct use as structural members due to the low quality. To make use of the by-product, a buil...
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Small-diameter round timber is a forestry by-product mainly from thinning of the artificial forest. It is not suitable for direct use as structural members due to the low quality. To make use of the by-product, a built-up stud fabricated with small-diameter round timber was proposed in this paper and was intended to be employed in a shear wall for light wood frame construction. The load-carrying capacity of the built-up stud was investigated experimentally by testing of the specimens under axial compression and testing of the specimens under eccentric compression, respectively. To predict the load-carrying capacity considering buckling, the equation for the modified slenderness ratio of the stud was derived. The predicted load-carrying capacity using the modified slenderness ratio correlated with the test very well. Some suggestions were then given to enhance the load-carrying capacity of the built-up stud. The study provides reference for incorporating the small-diameter round timber into a shear wall of light wood frame construction and thus promotes the application of small-diameter round timber as structural members.
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