The Effects of Near-Field Vertical Ground Motions on Structural Response

2009 ◽  
Author(s):  
M. Tehranizadeh ◽  
M.S. Rahim Labafzadeh
Keyword(s):  
Ground Motions ◽  
Near Field ◽  
Structural Response ◽  
Vertical Ground Motions ◽  
Vertical Ground

Effects of Coincident Response of Structures Subjected to Horizontal and Vertical Ground Motions on Evaluation of Peak Response

2004 ◽  
Author(s):  
Tomoyo Taniguchi ◽  
Mitsuru Takeshita
Keyword(s):  
Normal Distribution ◽  
Soil Structure ◽  
Response Spectrum ◽  
Ground Motions ◽  
Structural Response ◽  
Absolute Maximum ◽  
Peak Response ◽  
Vertical Ground Motions ◽  
Vertical Ground ◽  
Conventional Methods

A response spectrum rule, which considers the coincidence between horizontal and vertical responses, for dynamic analysis of structures subjected to horizontal and vertical ground motions is developed. The ratio of response coincidence, the vertical response to its absolute maximum at the maximum horizontal response, is introduced to express the intensity and direction of the coincident vertical response. It forms a certain normal distribution and is independent of types of earthquake, soil, structure and linearity/non-linearity of structural response. The combination of the maximum expected value of the ratio based on the allowable probability of exceedance and the modal responses gives the maximum expected coincident vertical response at the maximum horizontal response. Comparison of the combined response by the proposed method with the conventional methods highlights the conservativeness of conventional methods in evaluating the vertical response 38% and the combined response 7%.

scholarly journals Effect of Vertical Ground Motions on Horizontal Response of Structures

2003 ◽  
Vol 03 (02) ◽  
pp. 227-265 ◽  
Author(s):  
N. N. Ambraseys ◽  
J. Douglas
Keyword(s):  
Ground Motions ◽  
Near Field ◽  
Strong Motion ◽  
Single Degree Of Freedom ◽  
Vertical Excitation ◽  
Single Degree ◽  
Earthquake Ground Motions ◽  
The Standard Model ◽  
Vertical Ground Motions ◽  
Vertical Ground

Single-degree-of-freedom (SDOF) elastic models are commonly used for gaining an understanding of the response of structures to earthquake ground motions. The standard SDOF model used does not account for the effect of gravity or the combined effect of horizontal and vertical excitations on horizontal response. The purpose of this paper is to review previous work on this topic and to investigate a series of SDOF models that do incorporate these effects and to compare their response to the response of the standard model using 186 strong-motion records of near-field earthquake ground motions. It is found that for most realistic SDOF models and most earthquake ground motions the effect of vertical excitation on horizontal response is small.

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