The Seismic Response Analysis Method of the Jacket under Multiple Support Excitation

2012 ◽  
Vol 256-259 ◽  
pp. 2051-2055
Author(s):  
Jian Mei Sun ◽  
Hao Cui
Keyword(s):  
Seismic Analysis ◽  
Response Analysis ◽  
Analysis Method ◽  
Seismic Response Analysis ◽  
Oil Reserves ◽  
Long Span ◽  
Simplified Method ◽  
Multiple Support ◽  
Support Excitation ◽  
Offshore Oil

With the development of demand of exploiting offshore oil reserves, the Jacket platform structure’ span and depth is more and more large, so the seismic analysis of the jacket structure will become more and more complicated. In the dynamic analysis of long-span structures, multiple support excitation may be accounted is necessary. For big jacket structure, it is more accurate and reasonable by multiple support excitation than by uniform excitation. The objective of the research described herein is to develop a simplified method to investigate the effect of multiple support excitation on the jacket structure.

The Seismic Response Analysis of the Jacket under Multiple Support Excitation

2013 ◽  
Vol 295-298 ◽  
pp. 2021-2025
Author(s):  
Jian Mei Sun ◽  
Hao Cui
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Reaction Force ◽  
Space Structures ◽  
Response Analysis ◽  
Long Span ◽  
Force Reaction ◽  
Wave Travel ◽  
Multiple Support ◽  
Support Excitation

The effect of incoherency of seismic waves and wave travel on the displacement and force response of jacket structure are investigated from the maximum force, reaction force, the displacement, and so on. The conclusions illustrate it is necessary to consider the effect of multiple support excitation. The research of the differences of seismic response under multiple support excitation from uniform excitation presents the theoretical foundation on aseismatic projects for long span space structures such as jacket.

Seismic Response Analysis of Tower Crane in Consideration of the Building-Crane Interaction

2013 ◽  
Vol 353-356 ◽  
pp. 1981-1985 ◽  
Author(s):  
Bing Ai ◽  
Jia Lin Yang ◽  
Zeng Zhuang Pei
Keyword(s):  
Seismic Response ◽  
Seismic Analysis ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Analysis Method ◽  
Ansys Software ◽  
Seismic Response Analysis ◽  
3D Fem ◽  
Fem Model ◽  
Tower Crane

Interaction between buildings and tower has not been considered in former research..In this paper an integrated seismic analysis method is proposed considering the interaction between the building and the tower crane. A 3D-FEM model of the building and the crane is established with ANSYS software and seismic responses such as the displacement, the acceleration and the stress of the crane are analyzed. The sensitivity of the stiffness of the building on the dynamic responses is also analyzed. The results with consideration of the building-crane interaction, is higher than the results without interaction, and it becomes more significant with the increase of stiffness of the building.

scholarly journals Influence of Multiple-Support Excitation on Seismic Response of Reinforced Concrete Arch Bridges

2019 ◽  
Vol 10 (1) ◽  
pp. 17 ◽  
Author(s):  
Marta Savor Novak ◽  
Damir Lazarevic ◽  
Josip Atalic ◽  
Mario Uros
Keyword(s):  
Reinforced Concrete ◽  
Spatial Variation ◽  
Seismic Response ◽  
Ground Motion ◽  
Seismic Analysis ◽  
Numerical Study ◽  
Relative Significance ◽  
Multiple Support ◽  
Arch Bridges ◽  
Support Excitation

Although post-earthquake observations identified spatial variation of ground motion (i.e., multiple-support excitation) as a frequent cause of the unfavorable response of long-span bridges, this phenomenon is often not taken into account in seismic design to simplify the calculation procedure. This study investigates the influence of multiple-support excitation accounting for coherency loss and wave-passage effects on the seismic response of reinforced concrete deck arch bridges of long spans founded on rock sites. Parametric numerical study was conducted using the time-history method, the response spectrum method, and a simplified procedure according to the European seismic standards. Results showed that multiple-support excitation had a detrimental influence on response of almost all analyzed bridges regardless of considered arch span. Both considered spatial variation effects, acting separately or simultaneously, proved to be very important, with their relative significance depending on the response values and arch locations analyzed and seismic records used. Therefore, it is suggested that all spatially variable ground-motion effects are taken into account in seismic analysis of similar bridges.

Seismic response analysis of a piping system subjected to multiple support excitations in a base isolated NPP building

2015 ◽  
Vol 292 ◽  
pp. 283-295 ◽  
Author(s):  
Han-Bum Surh ◽  
Tae-Young Ryu ◽  
Jin-Sung Park ◽  
Eun-Woo Ahn ◽  
Chul-Sun Choi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Piping System ◽  
Seismic Response Analysis ◽  
Multiple Support

Nonlinear Seismic Response Analysis of Cable-Stayed Bridge under Uniform and Traveling-Wave Excitations

2015 ◽  
Vol 744-746 ◽  
pp. 793-798
Author(s):  
Kai Yan Xu
Keyword(s):  
Traveling Wave ◽  
Response Analysis ◽  
Wave Excitation ◽  
The Finite Element Method ◽  
Seismic Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Flexible Component ◽  
Method Model

The finite element method model of a 670.56m span cable-stayed bridge was established and the dynamic characteristic and nonlinear earthquake-responses of it under uniform and traveling-wave excitations were systematic studied. Results show that: 1) its former 10 rank frequency are located very dense which shows that more modes shape should be considered when dealing with the dynamic analysis. 2) The traveling-wave excitation has greater effect on long-span cable-stayed bridge, especially on the more flexible component and great attention should be paid to the design of such kind of bridge.

Sign in / Sign up

Export Citation Format

Share Document