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A platform for research: civil engineering, architecture and urbanism
Bending resistance design method for prestressed CFRP reinforced RC simply supported beam
The invention relates to the technical field of bridge reinforcement design, in particular to a prestress CFRP reinforced RC simply supported beam bending resistance design method which comprises the following steps that whether a bridge can achieve the purpose of improving the bending resistance bearing capacity through a prestress CFRP reinforced RC simply supported beam or not is judged; if the conditions are met, carrying out bearing capacity calculation on the RC simply supported beam reinforced by the prestress CFRP, namely, firstly obtaining an initial tension strain limit range of the prestress CFRP according to a proper rib damage principle, and then determining the control tension strain and the CFRP reinforcing layer number of the RC simply supported beam reinforced by the prestress CFRP according to the bearing capacity demand Ms of the RC simply supported beam after the RC simply supported beam is reinforced, so as to calculate the bearing capacity of the RC simply supported beam reinforced by the prestress CFRP. And finally, according to the initial tension strain limit range of the prestress CFRP, the initial control tension strain of the CFRP and the design reinforcement amount of the CFRP are obtained. A method for determining the initial control tension stress of the prestress CFRP is provided, the relation between the number of layers of the CFRP and the initial tension stress is established, and a bending resistance design method for reinforcing RC through the prestress CFRP is provided on the basis of the relation.
本发明涉及桥梁加固设计技术领域，尤其是一种预应力CFRP加固RC简支梁抗弯设计方法，包括以下步骤：判断桥梁是否能够通过预应力CFRP加固RC简支梁达到提高抗弯承载力的目的；若符合条件，则进行预应力CFRP加固RC简支梁的承载力演算，包括：首先根据适筋破坏原则获取预应力CFRP初始张拉应变界限范围，之后根据RC简支梁加固后其承载力需求Ms，确定预应力CFRP加固RC简支梁控制张拉应变及CFRP加固层数，最后根据预应力CFRP初始张拉应变界限范围，得到CFRP的初始控制张拉应变及CFRP设计加固用量；提出了预应力CFRP的初始控制张拉应力确定方法，建立了CFRP层数与初始张拉应力之间的关系，并在此基础上提出预应力CFRP加固RC的抗弯设计方法。
Bending resistance design method for prestressed CFRP reinforced RC simply supported beam
The invention relates to the technical field of bridge reinforcement design, in particular to a prestress CFRP reinforced RC simply supported beam bending resistance design method which comprises the following steps that whether a bridge can achieve the purpose of improving the bending resistance bearing capacity through a prestress CFRP reinforced RC simply supported beam or not is judged; if the conditions are met, carrying out bearing capacity calculation on the RC simply supported beam reinforced by the prestress CFRP, namely, firstly obtaining an initial tension strain limit range of the prestress CFRP according to a proper rib damage principle, and then determining the control tension strain and the CFRP reinforcing layer number of the RC simply supported beam reinforced by the prestress CFRP according to the bearing capacity demand Ms of the RC simply supported beam after the RC simply supported beam is reinforced, so as to calculate the bearing capacity of the RC simply supported beam reinforced by the prestress CFRP. And finally, according to the initial tension strain limit range of the prestress CFRP, the initial control tension strain of the CFRP and the design reinforcement amount of the CFRP are obtained. A method for determining the initial control tension stress of the prestress CFRP is provided, the relation between the number of layers of the CFRP and the initial tension stress is established, and a bending resistance design method for reinforcing RC through the prestress CFRP is provided on the basis of the relation.
本发明涉及桥梁加固设计技术领域，尤其是一种预应力CFRP加固RC简支梁抗弯设计方法，包括以下步骤：判断桥梁是否能够通过预应力CFRP加固RC简支梁达到提高抗弯承载力的目的；若符合条件，则进行预应力CFRP加固RC简支梁的承载力演算，包括：首先根据适筋破坏原则获取预应力CFRP初始张拉应变界限范围，之后根据RC简支梁加固后其承载力需求Ms，确定预应力CFRP加固RC简支梁控制张拉应变及CFRP加固层数，最后根据预应力CFRP初始张拉应变界限范围，得到CFRP的初始控制张拉应变及CFRP设计加固用量；提出了预应力CFRP的初始控制张拉应力确定方法，建立了CFRP层数与初始张拉应力之间的关系，并在此基础上提出预应力CFRP加固RC的抗弯设计方法。
Bending resistance design method for prestressed CFRP reinforced RC simply supported beam
一种预应力CFRP加固RC简支梁抗弯设计方法
WANG FUHAI (author) / QIN YU (author) / MA XIAOSONG (author) / XIN GONGFENG (author) / GUAN YANHUA (author) / ZHU XINGYUE (author) / LONG GUANXU (author) / JIANG KAI (author) / ZHUANG PEIZHI (author) / ZHANG ZEJUN (author)
2024-04-26
Patent
Electronic Resource
Chinese
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