scholarly journals MAXIMUM INTER-STORY DRIFT ANGLE OF MULTI-STORY STEEL FRAMES WITH SLIDING BASES SUBJECTED TO STRONG GROUND MOTIONS

2015 ◽  
Vol 80 (711) ◽  
pp. 791-799
Author(s):  
Shunya ONO ◽  
Minoru YAMANARI ◽  
Koji OGAWA
Keyword(s):  
Ground Motions ◽  
Steel Frames ◽  
Drift Angle ◽  
Strong Ground Motions ◽  
Story Drift ◽  
Strong Ground

scholarly journals Influence of P-Delta Effect on Ductility and Vulnerability of SMRF Steel Buildings

2015 ◽  
Vol 9 (1) ◽  
pp. 351-362 ◽  
Author(s):  
Juan Carlos Vielma Pérez ◽  
Manuel Antonio Cando Loachamín
Keyword(s):  
Seismic Behavior ◽  
Ground Motions ◽  
Steel Frames ◽  
Order Effect ◽  
Second Order ◽  
Steel Buildings ◽  
Strong Ground Motions ◽  
Earthquake Resistant ◽  
Moment Resisting ◽  
Strong Ground

Current earthquake-resistant procedures prescribe generic values for the response reductions factors, regardless of the configurational characteristics of the designed buildings. It is well know that these response reduction factors values reflect the expected behavior of the structures when they are under strong ground motions, being this seismic behavior usually evaluated through ductility and over-strength. In this work calculated values of the ductility of special moment-resisting steel frames with different span lengths and designed according the Ecuadorian Construction Code are presented. Results show that the buildings’ ductility is strongly influenced by the spans length and they would reach inadequate values if the second-order effect P-Δ occur, and then indicating that the structures are more vulnerable than structures not affected by P-Δ effect.

scholarly journals Broadband Strong-Motion Prediction for Future Nankai-Trough Earthquakes Using Statistical Green’s Function Method and Subsequent Building Damage Evaluation

2021 ◽  
Vol 11 (15) ◽  
pp. 7041
Author(s):  
Baoyintu Baoyintu ◽  
Naren Mandula ◽  
Hiroshi Kawase
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Nankai Trough ◽  
Ground Motions ◽  
Building Damage ◽  
Steel Buildings ◽  
Ground Acceleration ◽  
Attenuation Relations ◽  
Strong Ground Motions ◽  
Strong Ground

We used the Green’s function summation method together with the randomly perturbed asperity sources to sum up broadband statistical Green’s functions of a moderate-size source and predict strong ground motions due to the expected M8.1 to 8.7 Nankai-Trough earthquakes along the southern coast of western Japan. We successfully simulated seismic intensity distributions similar to the past earthquakes and strong ground motions similar to the empirical attenuation relations of peak ground acceleration and velocity. Using these results, we predicted building damage by non-linear response analyses and find that at the regions close to the source, as well as regions with relatively thick, soft sediments such as the shoreline and alluvium valleys along the rivers, there is a possibility of severe damage regardless of the types of buildings. Moreover, the predicted damage ratios for buildings built before 1981 are much higher than those built after because of the significant code modifications in 1981. We also find that the damage ratio is highest for steel buildings, followed by wooden houses, and then reinforced concrete buildings.

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