M@hdi42
7th October 2013, 03:04 AM
Near-Fault Seismic Ground Motions
http://forum.civilea.com/Thread-near-fault-seismic-ground
Author: Dreger, Douglas S., Hurtado, Gabriel, Chopra, Anil K., Larsen, Shawn C. | Size: 3.9 MB | Format: PDF
Bridges that cross faults are subject to static deformation that occurs at almost the same time as the arrival of dynamic pulse-like ground motions. Static offsets can be as large as several centimeters to many meters and strong ground motion velocity pulses exceeding 100 cm/s have been observed. Near-fault records, in the distance range of 10 to 100s of meters from faults are essentially nonexistent except for a few cases and therefore numerical simulation of ground motions for such near-fault situations is necessary. The paper presents simulated ground motions to 17.5 Hz, 15-100m from the fault for a Mw6.5 earthquake using an elastic finite-difference code. Simulations for homogeneous earth structure are compared for uniform and heterogeneous fault rupture scenarios. To investigate asymmetry of ground motions on opposite sides of a dipping reverse fault the dislocation method of Okada (1992) is used to compute static offset. From those results a simplified procedure for the simulation of near-fault time histories is developed. All of the simulations assume linear elasticity, and it is noted that the computed strain is as high as 10-4 - 10-3, and it is likely that there would be significant non-linear behavior in this near-fault region.
https://www.rapidshare.com/files/3269707274/Near_Fault.pdf
http://pic.civilea.net/images/44448513555988273268.jpg
بند انگشتی, برای دیدن عکس به صورت کامل بر روی آن کلیک نمایید
http://ifile.it/xluevmb/NFSGM_www.civilea.com.rar
or
http://hotfile.com/dl/125619627/06d741f/NFSGM_www.civilea.com.rar.html
or
http://www.4shared.com/file/ngVKkFkO/NFSGM_wwwcivileacom.html
http://forum.civilea.com/Thread-near-fault-seismic-ground
Author: Dreger, Douglas S., Hurtado, Gabriel, Chopra, Anil K., Larsen, Shawn C. | Size: 3.9 MB | Format: PDF
Bridges that cross faults are subject to static deformation that occurs at almost the same time as the arrival of dynamic pulse-like ground motions. Static offsets can be as large as several centimeters to many meters and strong ground motion velocity pulses exceeding 100 cm/s have been observed. Near-fault records, in the distance range of 10 to 100s of meters from faults are essentially nonexistent except for a few cases and therefore numerical simulation of ground motions for such near-fault situations is necessary. The paper presents simulated ground motions to 17.5 Hz, 15-100m from the fault for a Mw6.5 earthquake using an elastic finite-difference code. Simulations for homogeneous earth structure are compared for uniform and heterogeneous fault rupture scenarios. To investigate asymmetry of ground motions on opposite sides of a dipping reverse fault the dislocation method of Okada (1992) is used to compute static offset. From those results a simplified procedure for the simulation of near-fault time histories is developed. All of the simulations assume linear elasticity, and it is noted that the computed strain is as high as 10-4 - 10-3, and it is likely that there would be significant non-linear behavior in this near-fault region.
https://www.rapidshare.com/files/3269707274/Near_Fault.pdf
http://pic.civilea.net/images/44448513555988273268.jpg
بند انگشتی, برای دیدن عکس به صورت کامل بر روی آن کلیک نمایید
http://ifile.it/xluevmb/NFSGM_www.civilea.com.rar
or
http://hotfile.com/dl/125619627/06d741f/NFSGM_www.civilea.com.rar.html
or
http://www.4shared.com/file/ngVKkFkO/NFSGM_wwwcivileacom.html