Graphical Illustration Of Bearing Capacity Of Circular Normal Section And Study Of Bearing Capacity Of Oblique Section

Our country’s concrete structural design specifications has been successfully adapted,and the current version has been perfect and has reached a complete normative system.However,some aspects still have a short board than the standards of some developed countries.For example,the coils of circular and annular cross section have double nonlinear,namely the nonlinearity of material and cross-section width,concrete structural design specifications gives a transcendence group of compass,but it is necessary to solve it.In addition,the transcendence equation group is based on a uniform arrangement of the steel bar,and the steel bar close to the neutral shaft is small and does not take advantage of its strength.Therefore,this paper draws on some of the criteria for developed countries.Refer to the advanced place for me,providing some feasible reference recommendations for the re-revision of my country’s standards.The main job of the article is the derived method of circular and ring reinforced concrete cross-sectional bending capacity calculation.The curved "unified method" of the current standards of Europe and the United States has been cited,that is,the internal force value is obtained by the strain distribution based on the strain distribution,and the internal force value is obtained from the internal force value to resist the bending moment.The method combines this method with the actual national conditions of my country,and the calculation is concise and clear,and the result is accurate and clear.On this basis,the dimensional graphic algorithm for circular and ring cross-section-free ribs is proposed,when the circular or ring cross-section bending moment is clear,the longitudinal force of the symmetrical Figuration or the like is symmetrically Figured or the like,This Figure has a significant effect on saving steel,lifting material utilization and component stress syndrome.And the circular and ring dimensional outline algorithm under the influence of second-order effects were introduced.The corresponding value of the steel bars and concrete strains can also be indicated,which can be rapidly calculated in conventional conditions Calculate.In addition,the last chapter of the article analyzes the theoretical calculations of my country’s "mixed" and oblique cross-strand resistance in China,although shear formula is based on experimental data regression,but relatively,my country has no in-depth exploration of the stress of shear,ignores the influence of longitudinal steel bars,and many influencing factors are combined for one coefficient.Confused European and American norms,in the insubstantial components,the factors will be considered separately,and the shear formula is more meticulous and accurate;the truss mold is proposed in the calculation of the belly member,which clearly explains the anti-shear mechanism of the belly member.It is not necessary to rely on the calculation formula of the test data to return,if it can draw on the theoretical system of some developed national standards,there is no influence of its longitudinal reinforcement rate,and there is a gluten and gelatin truss model,which will calculate the anti-shear capacity More reasonable,it will inevitably help with the improvement of my country’s standardization.