フェロセメント板の静的曲げ強度

概要

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Static flexural tests were carried out on three types of ferrocement ; type A and type B to DnV rule, and a type with reinforcement only in tension side. Reinforcement content was systematically changed for these three types. Strength of ferrocement plate such as elastic modulus, cracking moment and maximum flexural moment were discussed assuming the ferrocement plate as a composite beam of mortar and steel, while ferrocement is assumed as a uniform material in many papers. Flexural moment, flexural elastic modulus and average crack spacing were discussed in terms of content and specific surface of reinforcement. Following conclusions were obtained ; (1) Flexural strength can be estimated on the basis of strength of mortar and reinforcement. (2) The moment at which cracks 0.02 to 0.025 mm wide are observed is about one and a half times of the estimated on strength of mortar. (3) From strength view point, optimum value of specific surface of reinforcement exists for structures of ferrocement of type A. For the value, cracking moment and maximum flexural moment are correlated to thickness of ferrocement plate, irrespective of type of structure.
社団法人日本船舶海洋工学会の論文