Upload
others
View
1
Download
0
Embed Size (px)
Citation preview
Validation and Utilization of Physics-Based Simulated Ground Motions for Bridge Performance Assessment
Investigators: Jawad Fayaz1, Sarah Azar2, Mayssa Dabaghi2 and Farzin Zareian1
1Department of Civil and Environmental Engineering, University of California, Irvine2Department of Civil and Environmental Engineering, American University of Beirut, Lebanon
Sim #1
Sim #2
Sim #100
20
15
10
5
0
0.15
0.10
0.05
0.0
-0.05
-0.10
-0.15
0 1 2 3 4 5
GM History
Zero Level
Zero Level Crossing
Cumulative Zero Level Crossings
2nd Order Polynomial
0 1 2 3 4 5
NGAWest2 Recorded GMs Physics-Based GMs (Cybershake 15.12)
𝐥𝐧(𝑬𝑫𝑷)= 𝒇𝒎𝒂𝒈 + 𝒇𝒅𝒊𝒔 + 𝒇𝒇𝒍𝒕 + 𝒇𝒉𝒏𝒈+ 𝒇𝒔𝒊𝒕𝒆 + 𝒇𝒔𝒆𝒅 + 𝒇𝒉𝒚𝒑 + 𝒇𝒅𝒊𝒑
𝐥𝐧(𝑹𝒁𝒁)= 𝒇𝒎𝒂𝒈 + 𝒇𝒅𝒊𝒔 + 𝒇𝒇𝒍𝒕 + 𝒇𝒉𝒏𝒈+ 𝒇𝒔𝒊𝒕𝒆 + 𝒇𝒔𝒆𝒅 + 𝒇𝒉𝒚𝒑 + 𝒇𝒅𝒊𝒑
RZZ Parameters
Engineering Demand Parameters (EDP)
𝐥𝐧 𝑬𝑫𝑷
= 𝒇𝑰𝒂,𝒎𝒂𝒋+ 𝒇𝑰𝒂,𝒎𝒊𝒏
+ 𝒇𝒇𝒎𝒊𝒅,𝒎𝒂𝒋+ 𝒇𝒇𝒎𝒊𝒅,𝒎𝒊𝒏
+ 𝒇𝒇′𝒎𝒂𝒋+ 𝒇𝒇′𝒎𝒊𝒏
+ 𝒇𝑻𝒎𝒊𝒅,𝒎𝒂𝒋+ 𝒇𝑻𝒎𝒊𝒅,𝒎𝒊𝒏
Rot50CDR
Acc YAcc X
CyberShake 15.12
(All Sites)
Recorded GM Sites
Selected CyberShake
Sites
CB14 Form CB14 FormLinear Regression Fitted Normal Distribution
100 CyberShake Simulations
Recorded GMs
𝐄𝐯𝐞𝐧𝐭 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫𝐬 (𝑴,𝑹, 𝑽𝒔𝟑𝟎) 𝐑𝐙𝐙 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫𝐬 (𝑰𝒂, 𝒇𝒎𝒊𝒅, 𝑫𝟓−𝟗𝟓) 𝐄𝐃𝐏(𝑹𝒐𝒕𝟓𝟎𝑪𝑫𝑹)
Goal: Compare and Validate
Simulated GMs against the
Recorded GMs using statistical
relationships between the
corresponding Event parameters,
RZZ parameters, and EDP of
Bridge structures.
Conclusions:
1. RZZ parameters can be too
stringent to perform validation of
simulated ground motions.
2. Relations between the Event
parameters and EDP, and RZZ
parameters and EDP for
recorded and simulated GMs
tend to be statistically similar.