参加pkpm学习班的笔记(国外英语资料).docVIP

参加pkpm学习班的笔记(国外英语资料) Take notes on the PKPM class Turn from okok Last weekend, I took part in the PKPM class, which mainly studied three contents: 1) the use of STS; (2) some problems of using PKPM for high-level design; (3) spascad modeling. For 1) and 3) I do not have much experience, but for 2) I have some experience. Finishing up their lectures on 2 notes, and we work together to learn to improve. For some of these views, I hope you can discuss it. Thank you！ Pkpm Lecture Notes I. wind load The basic period given in the program is calculated by approximate method. It is suggested that the basic period of the structure is calculated and then re calculated. Two 、 seismic action and structural vibration characteristics 1) for coupling options, recommendations are always adopted; 2) the structure of mass and stiffness distribution is obviously asymmetric, which should be taken into account under the influence of biaxial horizontal seismic action. Example: * * * a 31 story frame structure considering the bidirectional horizontal seismic force, and the average increment of shear weight ratio is 12.35%; * * * rule frame considering two horizontal earthquakes, column reinforcement increases about 10%, little change in other columns; * * * for irregular frames, angle, middle and side column reinforcement, both sides of the earthquake are obviously increased; By comparison of the two-way seismic force, single column bias calculation, two-way seismic force and double bias calculation, the calculation results show that the reinforcement ratio of the latter column is obviously increased. Recommendation: be careful if both the seismic force and the two-way reinforcement of the column are checked at the same time. 3) the influence of accidental eccentricity should be taken into account when calculating one-way seismic force. The accidental eccentricity of 5% is considered from the construction point of view. Consider the accidental eccentricity and increase the internal force