[amp_mcq option1=”(1 – C) mf – eE” option2=”(C – 1) mf + eE” option3=”(C – 1) mf – eE” option4=”(1 – C) mf + eE” correct=”option4″]<\/p>\n
The correct answer is: D. (1 – C) mf + eE<\/p>\n
Creep is the time-dependent deformation of a material under sustained load. Shrinkage is the decrease in volume of a material due to drying. The combined effect of creep and shrinkage is the deformation of a material due to both creep and shrinkage.<\/p>\n
The creep coefficient, $C$, is a dimensionless number that represents the amount of creep that a material will experience. The original pre-stress in concrete, $f$, is the stress that is applied to the concrete before it starts to creep. The modular ratio, $m$, is the ratio of the Young’s modulus of steel to the Young’s modulus of concrete. The Young’s modulus of steel, $E$, is the elastic modulus of steel. The shrinkage strain, $e$, is the strain that is caused by shrinkage.<\/p>\n
The combined effect of creep and shrinkage is given by the following equation:<\/p>\n
$$\\epsilon_{c + s} = (1 – C) mf + eE$$<\/p>\n
where:<\/p>\n
Option A is incorrect because it does not include the creep coefficient, $C$. Option B is incorrect because it does not include the shrinkage strain, $e$. Option C is incorrect because it has the wrong sign in front of the shrinkage strain, $e$.<\/p>\n","protected":false},"excerpt":{"rendered":"
[amp_mcq option1=”(1 – C) mf – eE” option2=”(C – 1) mf + eE” option3=”(C – 1) mf – eE” option4=”(1 – C) mf + eE” correct=”option4″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[640],"tags":[],"class_list":["post-5747","post","type-post","status-publish","format-standard","hentry","category-rcc-structures-design","no-featured-image-padding"],"yoast_head":"\n