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Probability Based Evaluation of Vehicular Bridge Load Using Weigh-in-Motion Data

机译:基于运动称量数据的基于概率的车辆桥梁载荷评估

摘要

Load and Resistance Factored Design (LRFD) method for designing bridge in Indonesia have been implemented for more than 25 years. LRFD method treating loads and strengths variables as random variables with specific safety factors for different loads and strengths variables type. The nominal loads, load factors, reduction factors, and other criteria for bridge design code can be determined to meet the reliability criteria. Statistical data of weigh-in-motion (WIM) vehicular loads measurement in Northern Java highway, Cikampek - Pamanukan, West Java (2011), used in as statistical loads variable. A 25 m simple span bridge with reinforced concrete T-girder is used as a model for structural analysis due to WIM measured and nominal vehicular load based on RSNI T-02-2005, with applied bending moment of girder as the output. The distribution fitting result of applied bending moment due to WIM measured vehicular loads is lognormal. The maximum bending moment due to RSNI T-02-2005 nominal vehicular load is 842.45 kN-m and has probability of exceedance of 5x10-5. It can be concluded, for this study, that the bridge designed using RSNI T-02-2005 is safely designed, since it has reliability index, β of 5.02, higher than target reliability, β ranging from 3.50 or 3.72.
机译:在印度尼西亚设计桥梁的荷载和阻力因数设计(LRFD)方法已经实施了25年以上。 LRFD方法将载荷和强度变量视为具有特定安全系数的随机变量,用于不同的载荷和强度变量类型。可以确定桥梁设计规范的标称载荷,载荷系数,减小系数和其他标准,以满足可靠性标准。西爪哇省Cikampek-Pamanukan的北爪哇省高速公路的动态称重(WIM)车辆载荷测量的统计数据(2011年),用作统计载荷变量。基于RSNI T-02-2005,根据WIM测得的车辆额定载荷和名义车辆载荷,以25 m的钢筋混凝土T梁为简单跨径桥梁作为结构分析模型,并以施加的梁弯矩为输出。 WIM测量的车辆载荷引起的施加弯矩的分布拟合结果为对数正态分布。由于RSNI T-02-2005标称车辆载荷而产生的最大弯矩为842.45 kN-m,超出概率为5x10-5。对于本研究可以得出结论,使用RSNI T-02-2005设计的桥梁是安全设计的,因为它的可靠性指数β为5.02,高于目标可靠性β范围为3.50或3.72。

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