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Two problems in design and calculation of higher bridge piers

CHENG Xiang-yun(Hume Engineering Consultants LTD. Guangdong, Guangzhou 510080, China)  
Based on the principle of minimum potential and using Rayleigh-Ritz method, the geometric non-linear analysis of higher bridge piers wes solved in this paper. The new concept of equivalent horizontal force proposed by the author may be easily to calculate the second effect, which wes produced due to the vertical forces and resisted by the piers and rubber pad bearings incorporately. The simple formula in this paper are applicable to calculate by hand, understood clearly without computation of successive iteration, higher precision and graspable easily for the disigner. Therefore it has the practical significance.
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