Method for determining allowable value of dry shrinkage strain and temperature shrinkage coefficient of continuous reinforcement concrete

Abstract

The invention discloses a method for determining allowable values of a dry shrinkage strain and a temperature shrinkage coefficient of continuous reinforcement concrete. The allowable values of the dry shrinkage strain and the temperature shrinkage coefficient are calculated based on a continuous reinforcement concrete pavement displacement calculation formula and a relation between the dry shrinkage strain and the temperature shrinkage coefficient, and a blank in the method for determining the dry shrinkage strain and the temperature shrinkage coefficient of the continuous reinforcement concrete at present is filled. After the allowable values of the dry shrinkage strain and the temperature shrinkage coefficient are determined, the allowable values can be used for guiding the structural design of the continuous reinforcement concrete pavement and the component design of concrete materials, the crack width of the continuous reinforcement concrete can be guaranteed to be smaller than the allowable value and thus the thrust of the continuous reinforcement concrete pavement is controlled. The method for determining the dry shrinkage strain and the temperature shrinkage coefficient of the continuous reinforcement concrete has the advantages of simple step, definite formula, clear thought and higher calculation accuracy.

Description

technical field [0001] The invention belongs to the field of continuously reinforced concrete pavement, and in particular relates to a method for determining allowable values ​​of dry shrinkage strain and temperature shrinkage coefficient of continuously reinforced concrete. Background technique [0002] Continuously reinforced concrete pavement (referred to as CRCP) is equipped with continuous steel bars in the longitudinal direction without joints. It has the characteristics of good integrity, smooth and comfortable driving, long service life, low maintenance cost, full life cycle, and reasonable economic benefits. It is suitable for High-grade highways and heavy-duty highways have been widely used at home and abroad in recent years. [0003] Thrust is the most important disease of continuously reinforced concrete pavement. It refers to the area enclosed by two transverse cracks with a small distance (less than 0.6m), short longitudinal cracks and the edge of the road (or...

AI Technical Summary

Problems solved by technology

However, there is still a lack of quantitative determination methods for the allowable values ​​of the dry shrinkage strain and temperature shrinkage coefficient of concrete, so the composition of continuously reinforced concrete cannot be optimally designed based on the allowable values, and the crack width and burst number of CRCP cannot be controlled.

Images