Wind Load Evaluation based on the Field Measurement Data for the Design of a Suspension Bridge

2017 ◽  
Author(s):  
Kilje Jung ◽  
Chong Hyun Kim ◽  
Gi Nam Kim ◽  
Eui Taek Yoon
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Suspension Bridge ◽  
Wind Load ◽  
Load Evaluation

Thermal Effects of a Large Scale Bridge Tower Based on Field Measurement

2010 ◽  
Vol 156-157 ◽  
pp. 1450-1454
Author(s):  
Bo Chen ◽  
Chun Fang Song ◽  
Jin Zheng
Keyword(s):  
Field Measurement ◽  
Thermal Effects ◽  
Large Scale ◽  
Measurement Data ◽  
Suspension Bridge ◽  
Ambient Air ◽  
Suspension Bridges ◽  
Thermal Displacement ◽  
Positioning Systems ◽  
Long Span

Long span suspension bridges are subjected to daily, seasonal and yearly environmental thermal effects induced by solar radiation and ambient air temperature. The temperature loading effects of bridge towers of a long span cable suspension bridge are investigated based on field measurement data from temperature sensors and Global Positioning Systems. The recorded statistical data regarding the ambient/bridge temperature and the tower displacement responses are pre-processed in order to remove unreasonable and undesirable data and ensure the quality of analysis. The statistics of effective bridge temperature undergone by Tsing Ma Bridge are obtained for different time intervals. The mean displacement responses of the bridge towers in three directions are also analyzed to obtain their statistics. The observations demonstrate that the longitudinal thermal displacement of bridge towers is quite larger than those in lateral and vertical directions. The probability properties of thermal displacement of bridge towers are different to those of the commonly accepted Gauss distribution.

Multi-peaked directional wave spectra based on extensive field measurement data in the Gulf of Oman

2021 ◽  
Vol 230 ◽  
pp. 109057
Author(s):  
Mohammad Adibzade ◽  
Mehdi Shafieefar ◽  
Hassan Akbari ◽  
Roozbeh Panahi
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Wave Spectra ◽  
Gulf Of Oman ◽  
Extensive Field ◽  
Directional Wave

In Situ Stress Measurement and Inversion in Deep Roadway

2013 ◽  
Vol 734-737 ◽  
pp. 759-763 ◽  
Author(s):  
Yong Li ◽  
Yun Yi Zhang ◽  
Ren Jie Gao ◽  
Shuai Tao Xie
Keyword(s):  
Field Measurement ◽  
Stress Measurement ◽  
Measurement Data ◽  
Back Analysis ◽  
In Situ Stress ◽  
Deep Mine ◽  
Accuracy Requirement ◽  
Initial Stress Field ◽  
In Situ Stress Measurement

Jixi mine area is one of the early mined areas in China and it's a typical deep mine. Because of large deformation of underground roadway and dynamic disasters occurred frequently in this mine, five measurement points of in-situ stress in this mine was measured and then analyzed with inversion. Based on these in-situ stress measurement data, numerical model of 3D in-situ stress back analysis was established. According to different stress fields, related analytical samples of neural network were given with FLAC program. Through the determination of hidden layers, hidden nodes and the setting of parameters, the network was optimized and trained. Then according to field measurement of in-situ stress, back analysis of initial stress field was conducted. Compared with field measurement, with accuracy requirement satisfied, it shows that the in-situ stress of rock mass obtained is basically reasonable. Meanwhile, it proves that the measurement of in-situ stress can provide deep mines with effective and rapid means, and also provide reliable data to optimization of deep roadway layout and supporting design.

scholarly journals Pengaruh Posisi Bukaan terhadap Penghawaan Alami pada Rumah Balai Padang

2019 ◽  
Vol 2 (1) ◽  
pp. 10
Author(s):  
Rahma Yanti
Keyword(s):  
Field Measurement ◽  
Stokes Equations ◽  
Measurement Data ◽  
Numerical Results ◽  
Navier Stokes ◽  
Navier Stokes Equations

Penelitian ini bertujuan untuk mengetahui efek dari posisi dari bukaan yang ada di rumah Balai Padang. Metode yang digunakan adalah eksperimental dengan menggunakan bantuan software CFD (computational Fluid Dimension) berdasarkan persamaan Navier-Stoke, menggunakan K-Epsilon RNG. Eksperimen dilakukan dengan validasi hasil pengukuran lapangan This study aims to investigate the effect of position openings in Balai Padang house. The numerical methodology is based on solution of the Navier-Stokes equations, using K-epsilon RNG. Numerical results are validated with available field measurement data.

Probabilistic Fatigue Damage Analysis of Long Span Suspension Bridge Due to Wind Induced Buffeting

2020 ◽  
Vol 980 ◽  
pp. 275-281
Author(s):  
Hu Jun
Keyword(s):  
Fatigue Life ◽  
Fatigue Damage ◽  
Time History ◽  
Suspension Bridge ◽  
Wind Load ◽  
Strong Wind ◽  
Fatigue Reliability ◽  
Long Span ◽  
Fatigue Damage Analysis ◽  
Fluctuating Wind

In order to consider the fluctuating wind load induced fatigue problem of long span suspension bridge, fatigue reliability formula is modified by assuming the fatigue life is accord with the weibull distribution. Based on the accurate bridge buffeting analysis of time history, the stress time history of components of a suspension bridge in east sea China is simulated, and then the fatigue damages and reliabilities are calculated. The results indicate that the main cables and hangers have enough fatigue reliability under the fluctuating wind load, the fatigue failure will not occur; the stiffening girder has larger fatigue damage, under 40 / (m.s-1) mean wind speed action, the girder of mid-support section’s average fatigue life is only 3.103 years, so the girder’s damage under strong wind action should be taken seriously.

The Comparison of Tunnel Engineering Construction Methods for Renhechang Tunnel Crossing Underneath Existing Tunnel on Lanzhou-Chongqing Railway

2013 ◽  
Vol 405-408 ◽  
pp. 1330-1333 ◽  
Author(s):  
Chuan Yi Sui ◽  
Xu Dong Zhou ◽  
Lin Hui Wang
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Tunnel Construction ◽  
Tunnel Engineering ◽  
Engineering Construction ◽  
Existing Structures ◽  
Construction Methods ◽  
Tunneling Method ◽  
Simulation Results ◽  
The Cross

Problems often exist in construction of transportation tunnels, such as the effect of new tunnels constructed close to existing structures. Solving this magnificent problem by carefully choosing tunnel construction methods will be beneficial to minimize effects on existing structures while ensuring the newly constructed tunnel is both time-consuming and economical. Three representative engineering methods-the benching tunneling method, the Center Diaphragm method and the Cross Diaphragm method-are compared in controlling the settlement of new tunnel vault and the deformation of the existing tunnel. Finally checking the simulation results by comparing with field measurement data.

Validation of MODIS and CYCLOPES LAI products using global field measurement data

2012 ◽  
Vol 119 ◽  
pp. 43-54 ◽  
Author(s):  
Hongliang Fang ◽  
Shanshan Wei ◽  
Shunlin Liang
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Global Field
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