Seismic design for steel trussed arch to multi-support excitations

Abstract The behavior of steel trussed arch to multi-support excitations is studied. The spatial variation of ground motion is modeled by an empirical coherency loss function. Numerical results indicate that horizontal multi-support excitations have a quite large amplification effect on the seismic responses of the trussed arch. This amplification effect cannot be ignored in the seismic design of such structures. Vertical multi-support excitations reduce the seismic responses of the trussed arch. Therefore the assumption that vertical free-field ground motions are spatially uniform is available to assure the degree of seismic safety reliability of the trussed arch. An average response spectrum method is subsequently introduced to calculate the arch response to multi-support excitations. The advantage of the method is that the linear peak seismic response of the arch to multi-support excitations can be obtained as conveniently as the conventional response spectrum method does. The good agreement of results between the time-history method and the average response spectrum method shows the validity of the latter method.

[1]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[2]  E. Vanmarcke,et al.  Seismic Random‐Vibration Analysis of Multisupport‐Structural Systems , 1994 .

[3]  Hong Hao.  Response of two-way eccentric building to nonuniform base excitations , 1998 .

[4]  Shiro Kato,et al.  Effects of Surface Motion Difference at Footings on the Earthquake Responses of Large-Span Gable Structures , 2002 .

[5]  J. Penzien,et al.  Multiple-station ground motion processing and simulation based on smart-1 array data , 1989 .

[6]  Y. Yeh,et al.  Spatial variation and stochastic modelling of seismic differential ground movement , 1988 .

[7]  H. Hao.  Torsional response of building structures to spatial random ground excitations , 1997 .

[8]  Frederic Ward Williams,et al.  Seismic spatial effects for long-span bridges, using the pseudo excitation method , 2004 .

[9]  H. Hao.  Arch responses to correlated multiple excitations , 1993 .

[10]  E. Vanmarcke,et al.  Stochastic Variation of Earthquake Ground Motion in Space and Time , 1986 .

[11]  H. L. Wong,et al.  Response of a rigid foundation to a spatially random ground motion , 1986 .

[12]  Ernesto Heredia-Zavoni,et al.  Torsional response of symmetric buildings to incoherent and phase‐delayed earthquake ground motion , 2003 .

[13]  A. M. Abdel-Ghaffar,et al.  Effects of ground motion spatial variability on the response of cable‐stayed bridges , 1992 .

[14]  Claudio Modena,et al.  PERFORMANCE EVALUATION OF SHORT SPAN REINFORCED CONCRETE ARCH BRIDGES , 2004 .

[15]  Shiro Kato,et al.  Effects of Wave Passage and Local Site on Seismic Responses of a Single Layered Reticular Dome Structure , 2003 .

[16]  Shiro Kato,et al.  A new average response spectrum method for linear response analysis of structures to spatial earthquake ground motions , 2006 .

[17]  Dong Shi-lin.  Dynamic Property Analysis of Folded Plate Type Latticed Shell , 2002 .

[18]  A. Kiureghian,et al.  Response spectrum method for multi‐support seismic excitations , 1992 .

[19]  Wang Rong.  Study on dynamic characteristics and behavior of cable dome subjected to multi-dimensional and multi-point seismic excitations , 2005 .