In consideration that behavior of curvature ductility of interior support directly influences the degree of moment modification of unbonded prestressed concrete (UPC) continuous structures, constitutive relationships ...In consideration that behavior of curvature ductility of interior support directly influences the degree of moment modification of unbonded prestressed concrete (UPC) continuous structures, constitutive relationships of concrete, non-prestressed reinforcement and prestressed reinforcement used for nonlinear analysis are given. Through simulation analysis on simple beams subjected to single loading at the middle of the span, the law of factors influencing curvature ductility, such as global reinforcing index, prestressing degree, effective prestress, strength of concrete and grade of non-prestressed reinforcement are explored. Based on these researches, calculating formula of curvature ductility coefficient of UPC beams is established, which provides basic data for further research on plastic design of UPC indeterminate structures.展开更多
With technical assistance from INBAR and the Research Institute of Wood Industry of the Chinese Academy of Forestry, the construction of the Pingbian Primary School was completed in 2004, where bamboo plywood panels a...With technical assistance from INBAR and the Research Institute of Wood Industry of the Chinese Academy of Forestry, the construction of the Pingbian Primary School was completed in 2004, where bamboo plywood panels and laminated beams were used for the roof trusses, sheathing boards and wall panels. This is the first time that bamboo-based panels are used for structural applications.展开更多
文摘In consideration that behavior of curvature ductility of interior support directly influences the degree of moment modification of unbonded prestressed concrete (UPC) continuous structures, constitutive relationships of concrete, non-prestressed reinforcement and prestressed reinforcement used for nonlinear analysis are given. Through simulation analysis on simple beams subjected to single loading at the middle of the span, the law of factors influencing curvature ductility, such as global reinforcing index, prestressing degree, effective prestress, strength of concrete and grade of non-prestressed reinforcement are explored. Based on these researches, calculating formula of curvature ductility coefficient of UPC beams is established, which provides basic data for further research on plastic design of UPC indeterminate structures.
文摘With technical assistance from INBAR and the Research Institute of Wood Industry of the Chinese Academy of Forestry, the construction of the Pingbian Primary School was completed in 2004, where bamboo plywood panels and laminated beams were used for the roof trusses, sheathing boards and wall panels. This is the first time that bamboo-based panels are used for structural applications.
