種別 paper
主題 MODELING OF THE QUASI - STATIC BEHAVIOR OF FRESH CONCRETE
副題
筆頭著者 Somnuk TAGGTERMSIRIKUL(Taisei corporation)
連名者1 Kohichi MAEKAWA(the University of Tokyo)
連名者2  
連名者3  
連名者4  
連名者5  
キーワード
12
2
先頭ページ 813
末尾ページ 818
年度 1990
要旨 INTRODUCTION
Various fresh concrete behavior can be considered as quasi-static dewatering under pressure, bleeding and plastic shrinkage, for example. Deformability loss due to loss of water and porous surface due to water flow through the surface occur if the concrete dewaters greatly. Bleeding, causing non-uniformity, affects strength and durability of the concrete. Plastic shrinkage causes severe cracking above the fixed objects in the fresh concrete if the concrete settlement is significant. This paper introduces an analytical model to simulate the quasi-static behavior of fresh concrete. 3-D model was developed, however, only the simplified 1-D model is described. The model can be used as a tool to design good fresh concrete concerning quasi-static behavior.
CONCLUSIONS
The following conclusions can be made based on the proposed quasi-static model. (1) A mathematical model for simulating quasi-static behavior of concrete was proposed based on multi-phase material theory. (2) Fresh concrete was considered to be composed of 5 phases namely gravel, sand, powder, liquid and air phases, and it was simplified to be a 3- phase material model by neglecting the segregation among the solid particles. (3) The governing equations were derived based on the 3-phase material. (4) The model was used to simulate dewatering under pressure and bleeding fresh concrete by assuming the stress-strain curve of solid phase and permeability curve. Satisfactory qualitative results were obtained.
PDFファイル名 012-01-2137.pdf


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