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Structural Engineering and Mechanics
  Volume 12, Number 3, September 2001 , pages 313-328

Finite strip analysis of multi-span box girder bridges by using non-periodic B-spline interpolation
C.K. Choi and H.S. Hong(Korea)

    A multi-span bridge has the peak value of resultant girder moment or membrane stress at the
interior support. In this paper, the spline finite strip method (FSM) is modified to obtain the more
appropriate solution at the interior support where the peak values of solution exist. The modification has
been achieved by expressing the shape function with non-periodic B-splines which have multiple knots at
the boundary. The modified B-splines have the useful feature for interpolating the curve with sudden
change in curvature. Moreover, the modified spline FSM is very efficient in analyzing multi-span box
girder bridges, since a bridge can be modeled by an assembly of strips extended along the entire bridge
length. Numerical examples of the bridge analysis have been performed to verify the efficiency and
accuracy of the new spline FSM.
Key Words
    finite strip; non-periodic B-spline function; multi-span bridge.
C.K. Choi, Department of Civil Engineering, KAIST, Daejeon 305-701, Korea
H.S. Hong, Structural Division, Chungsuk Engineering Co., Seoul 137-809, Korea

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