Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for calculating maximum crack width of concrete flexural member provided with high-strength steel bars
The invention relates to the field of civil engineering structure design and construction, in particular to a method for calculating the maximum crack width of a concrete flexural member provided with high-strength steel bars, in which alpha cr is the stress characteristic coefficient of the member, psi is the strain non-uniform coefficient of longitudinal tensile steel bars among cracks, and psi is the strain non-uniform coefficient of the longitudinal tensile steel bars among the cracks. Sigma s is the longitudinal tensile ordinary reinforcement stress of the reinforced concrete member calculated according to a load quasi-permanent combination or the longitudinal tensile reinforcement equivalent stress of the prestressed concrete member calculated according to a standard combination, Es is the elastic modulus of the reinforcement, cs is the distance from the outer edge of the longitudinal tensile reinforcement on the outermost layer to the bottom edge of the tensile area, deq is the equivalent diameter of the tensile high-strength reinforcement, and Es is the elastic modulus of the reinforcement. And rho te is the reinforcement ratio of the longitudinal tensile steel bars calculated according to the effective tensile concrete cross-sectional area. The method solves the problem that the concrete flexural member provided with the high-strength steel bars is lack of an applicable crack checking calculation formula when the normal use limit state is designed and checked, and provides a practical reference basis for the high-strength steel bars in practical engineering application.
本发明涉及土木工程结构设计及施工领域，具体涉及一种配置高强钢筋的混凝土受弯构件最大裂缝宽度的计算方法：其中，αcr为构件受力特征系数，ψ为裂缝间纵向受拉钢筋应变不均匀系数，σs为按荷载准永久组合计算的钢筋混凝土构件纵向受拉普通钢筋应力或按标准组合计算的预应力混凝土构件纵向受拉钢筋等效应力，Es为钢筋的弹性模量，cs为最外层纵向受拉钢筋外边缘至受拉区底边的距离，deq为受拉高强钢筋等效直径，ρte为按有效受拉混凝土截面面积计算的纵向受拉钢筋配筋率。本发明解决了配置高强钢筋的混凝土受弯构件在设计验算正常使用极限状态时缺乏适用裂缝验算公式的情况，为高强钢筋在实际工程应用提供实用借鉴依据。
Method for calculating maximum crack width of concrete flexural member provided with high-strength steel bars
The invention relates to the field of civil engineering structure design and construction, in particular to a method for calculating the maximum crack width of a concrete flexural member provided with high-strength steel bars, in which alpha cr is the stress characteristic coefficient of the member, psi is the strain non-uniform coefficient of longitudinal tensile steel bars among cracks, and psi is the strain non-uniform coefficient of the longitudinal tensile steel bars among the cracks. Sigma s is the longitudinal tensile ordinary reinforcement stress of the reinforced concrete member calculated according to a load quasi-permanent combination or the longitudinal tensile reinforcement equivalent stress of the prestressed concrete member calculated according to a standard combination, Es is the elastic modulus of the reinforcement, cs is the distance from the outer edge of the longitudinal tensile reinforcement on the outermost layer to the bottom edge of the tensile area, deq is the equivalent diameter of the tensile high-strength reinforcement, and Es is the elastic modulus of the reinforcement. And rho te is the reinforcement ratio of the longitudinal tensile steel bars calculated according to the effective tensile concrete cross-sectional area. The method solves the problem that the concrete flexural member provided with the high-strength steel bars is lack of an applicable crack checking calculation formula when the normal use limit state is designed and checked, and provides a practical reference basis for the high-strength steel bars in practical engineering application.
本发明涉及土木工程结构设计及施工领域，具体涉及一种配置高强钢筋的混凝土受弯构件最大裂缝宽度的计算方法：其中，αcr为构件受力特征系数，ψ为裂缝间纵向受拉钢筋应变不均匀系数，σs为按荷载准永久组合计算的钢筋混凝土构件纵向受拉普通钢筋应力或按标准组合计算的预应力混凝土构件纵向受拉钢筋等效应力，Es为钢筋的弹性模量，cs为最外层纵向受拉钢筋外边缘至受拉区底边的距离，deq为受拉高强钢筋等效直径，ρte为按有效受拉混凝土截面面积计算的纵向受拉钢筋配筋率。本发明解决了配置高强钢筋的混凝土受弯构件在设计验算正常使用极限状态时缺乏适用裂缝验算公式的情况，为高强钢筋在实际工程应用提供实用借鉴依据。
Method for calculating maximum crack width of concrete flexural member provided with high-strength steel bars
配置高强钢筋的混凝土受弯构件最大裂缝宽度的计算方法
WEI TAOKAI (Autor:in) / HUANG HUA (Autor:in)
04.07.2023
Patent
Elektronische Ressource
Chinesisch
Method of Calculating Crack Width of Reinforced Concrete Flexural Members
| British Library Conference Proceedings | 1995
Flexural Strength Design of Concrete Beams Reinforced with High-Strength Steel Bars
| Online Contents | 2008
The analysis of crack width in flexural concrete members reinforced with polymer composite bars
| DOAJ | 2020
| Europäisches Patentamt | 2015