Abstract

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Title:: Tolerance Control Analysis of Concrete Member for Prefabricated Construction in Domestic and International Standards

Author(s):: LIU Peng; CHEN Ying; LUO Xiao-yong; YU Zhi-wu; LONG Hao; School of Civil Engineering, Central South University

Keywords:: prefabricated construction; concrete; standard; tolerance; member type

Abstract:: Aiming at the important engineering significance of dimension allowable tolerance control of concrete member for prefabricated construction, the differences of allowable tolerance for concrete members in the production and installation stages of domestic and international prefabricated construction standards were analyzed. It was pointed out that the differences of allowable tolerance were embodied in allowable tolerance value and range of value, tolerance partition function form, component type and size, etc. The results show that the division principle and method of allowable tolerance of components are different in standards, and the domestic standard emphasizes the value and range of tolerance. In contrast, the influences of dimension and type of concrete member on the allowable tolerance are highlighted by foreign standards. The national standard for allowable tolerances of component sizes is stricter than industry and local standards. Many defects of tolerance for prefabricated construction proposed by existing standards exist, including determination criteria and method, lack of tolerance control theory during the whole process. In addition, the effects of tolerance accumulation and offset are neglected in each standard, and some tolerance control requirements contradict each other.