| With the publication and application of new Code for Seismic Design for Buildings (GB50011-2001), the difference and influence between the old and the new Code are more and more attended. It is very necessary to analyze the difference to hold the idea of the new Code and from the analysis to find and discover problems is also essential to guild the application. The thesis is the first part of the analysis about the difference between new and the old Code. And it focus on two parts: firstly, the list between the new and old Code is compared. Secondly, the design of the regular plane frame is contrasted. The aim of the first part is to summarize the amendment of the new Code and the second is to study the design distinction and rule leaded by the new Code. The mainly done in this paper is as follow:(1) Six parts is particularly contrasted include: the idea, application area, basic design requirement, site and basement, seismic action and aseismic check. The change is emphasized and the result is analyzed.(2) Make a program to design plane frame structures and result is validated.(3) Select a number of normal frame structures (16x4=64)with different height, site and fortification intensity to analyze according to new and old Code.From the above analysis, the thesis get results as following:(1) Frame buildings' internal force Frame buildings' internal force is enhanced in the new Code and changed according to the building site, for example, the force of the structure in the site â… ,â…¡and â…¢ will increase about 20%,14% and 10% respectively in the new Code, but the force in the site â…£is no difference.(2) Frame structures' elastic inter-story displacement ration Frame structures' elastic inter-story displacement ration is augmented because the internal force is increased and the change rule is as the same as the internal force.(3) The size and control factor of the column section The size and control factor of the column section designed by the new Code is as the same with the size and factor by the old Code in three and four grade aseismic buildings. But the section size of the outside-column will raise about 10% in grade one and tow frame. The elastic inter-story displacement rotation and section size of anti-shear in the column in grade one and tow frame will become the prominent factors.(4) Design internal force Design moment in the column is enlarged about 10%,10%,20% and 30% respectively in the new Code. And the design shear in the new one is increased about 10%~15%,5%~15%,30% and 40% respectively.(5) The design control condition of arrangement of bar The design condition of the longitude bar is controlled by details of fortification design in new Code if it is controlled by weight and wind in old Code. And the control factor changed from details to aseismic design calculation. But stirrups arrangement condition is still controlled by details.(6) Percentage of reinforcement in the column The percentage of longitude bars is enhanced about 15%~25% in columns and changed according to control condition. And the enhancement reinforcement percentage in the grade one frame structures is notable, for example the percentage of reinforcement, which dominated by details or calculation in old Code, controlled by calculation in new Code will increase about 40%, and more the percentage will enlarge about 180% if the real percentage in design is considered. The percentage of stirrup will not change in the two Code except the grade four frame in the new Code which is grade three frame in the old Code, it's stirrup percentage will decrease about 53%, and the most can be 85%. Some of the stirrup percentage in grade three and two frame will decrease and others will increase. The most augment and decrement will be 17% and 11% respectively. And in the grade on frame, the stirrup percentage will enlarge about 30% to 40%, furthermore, it will be 110% to 160% if the real percentage is considered. (7) The strong column coefficient The strong column coefficient in t... |
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