The Analysis And Control Of Non-loaded Crack On Reinforced Concrete Structure

Different kinds of crack emerge during the process of constructing and using concrete structure. As to the loaded crack, the CODE of our country has offered calculating method and control measure. This thesis investigated and researched on non-loaded crack, especially those caused by thermal-shrink, and analyzed the thermal-shrink stress of beam, slab and continuous-wall, found that according data of civil and overseas offered thermal-shrink calculating formula without considering effect of factors, such as the cement quantity, using of aruhuesiru, aggregate size and quantity of sand, which made the result data smaller. In addition, there are not enough construct measure in CODE. To deal with these problems, base on the conclusion of advanced experiences of civil and abroad and adopted elastic theory, this thesis draw to the calculating formula and offered some strengthen measure. These formula and measures have been tested by practical construction, and the results are satisfied.