The effect of different intensity measures and earthquake directions on the seismic assessment of skewed highway bridges

被引：34
|
作者：
Bayat, M. [1 ]
Daneshjoo, F. [1 ]
Nistico, N. [2 ]
机构：
[1] Tarbiat Modares Univ, Dept Civil & Environm Engn, Tehran, Iran
[2] Univ Roma La Sapienza, Dept Struct & Geotech Engn, Rome, Italy
来源：
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION | 2017年 / 16卷 / 01期
关键词：
skewed highway bridge; earthquake direction; spectral intensity measure; analytical fragility curve; FRAGILITY CURVES; VULNERABILITY; MODELS; RISK;
D O I：
10.1007/s11803-017-0375-z
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study the probable seismic behavior of skewed bridges with continuous decks under earthquake excitations from different directions is investigated. A 45A degrees skewed bridge is studied. A suite of 20 records is used to perform an Incremental Dynamic Analysis (IDA) for fragility curves. Four different earthquake directions have been considered: -45A degrees, 0A degrees, 22.5A degrees, 45A degrees. A sensitivity analysis on different spectral intensity meas ures is presented; efficiency and practicality of different intensity measures have been studied. The fragility curves obtained indicate that the critical direction for skewed bridges is the skew direction as well as the longitudinal direction. The study shows the importance of finding the most critical earthquake in understanding and predicting the behavior of skewed bridges.
引用
收藏
页码：165 / 179
页数：15
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