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JTG / t2231-01-2020 code for seismic design of highway bridges pdf

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2020-07-09
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Road and bridge standard atlas
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Brief introduction: On the basis of extensive investigation and comments, the compilation group focused on the problems found in the implementation process of the 08 rules and the lack of
At the same time, as far as possible to absorb the domestic and foreign mature bridge seismic design results, with the current highway engineering technical standard
Based on the principle of coordination of quasi specifications, the detailed rules 08 are revised. The main amendments are as follows:
(1) The content of seismic system of bridge structure is added, and the content of seismic conceptual design is refined;
(2) The checking calculation of pile foundation and adjustment coefficient of bearing capacity are revised;
(3) The design acceleration response spectrum is revised and the concept of spectral ratio function is cancelled;
(4) The part of hydrodynamic pressure is revised;
(5) The application scope of linear elastic analysis method is expanded;
(6) The seismic calculation method of regular bridges is revised;
(7) The shear calculation formula of plastic hinge area of pier column is modified;
(8) The seismic displacement correction coefficient of elastic calculation method under E2 earthquake is revised;
(9) The calculation method of ductility coefficient is added;
(10) The calculation method of capacity protection component is revised;
(11) The formula for calculating the overlapping length of pier beam is modified;
(12) The contents of seismic design of seismic isolation bridges are supplemented and refined;
(13) The article arrangement and narration of some chapters are optimized and adjusted;
(14) The new concept of "seismic structure measure grade" is introduced.
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JTG / t2231-01-2020 code for seismic design of Highway Bridges
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