梁格法计算注意事项小结（Summary of calculation notes for beam and column）.docVIP

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梁格法计算注意事项小结（Summary of calculation notes for beam and column）.doc

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梁格法计算注意事项小结（Summary of calculation notes for beam and column）

梁格法计算注意事项小结（Summary of calculation notes for beam and column） Notes on Calculation of beam and girder Summary of the Chinese steel structure forum with a few discussions and other specific analysis of the brother frog, briefly arranged as follows: (to express heartfelt thanks to the help of the frog brother): Question: 1. single box double room box girder section, according to the book and Midas to calculate and compare difference ten times from the torsional inertia longitudinal beam grid, I is in accordance with the upper structure performance bridge page 106 beam 3, in the end to the subject? Dai Gonglian teacher programming according to the book, I do not know what the general adoption of the algorithm? 2. for the side beam, the centroid and establishment of beam nodes do not coincide in transverse bending caused by prestressing force, how to deduct in the results, here is my premise is the I-shaped section and tau cross section PSC section of the web, the center line of the model, not the numerical type. As we know, for symmetric linear bridge structures, prestress does not normally produce lateral bending moment. How can we eliminate the influence of this part after the grillage? 3. the same problem in the body weight, the longitudinal beam grillage is generally the center line from the web, and the actual deviation from the centroid to tens of centimeters, longitudinal weight should produce torque, does not add the eccentric torque? My premise is using the I-shaped section section of the cross section of PSC and tau 4. for curved bridge, due to internal and external side of the arc length caused by inconsistency of self generated torque for section centroid using grillage method after grillage itself because of different length, do not consider the impact of this factor, which do not add a uniform torque? 5. after the calculation is completed, the design function of PSC section is adopted. In addition to the calculation of the ordinary steel bar, some units a