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Xin Ruan
Tongji University
20Publications
7H-index
108Citations
Publications 20
Newest
#1Junyong Zhou (Tongji University)H-Index: 3
#2Xin Ruan (Tongji University)H-Index: 7
Last.Colin Christopher Caprani (Monash University)H-Index: 14
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AbstractTraffic micro-simulation is the newly developed approach for loading calculation of long span bridges. The approach is quite precise, but computationally expensive to consider the full extent of traffic loading scenarios during a bridge lifetime. To address this shortfall, an efficient multi-scale traffic modelling approach is proposed. The proposed approach uses micro- and macro-simulation with different load model varieties (LMVs), or fidelities (levels of detail) of traffic loading in...
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#1Junyong Zhou (Tongji University)H-Index: 3
#2Xuefei Shi (Tongji University)H-Index: 3
Last.Xin Ruan (Tongji University)H-Index: 7
view all 4 authors...
Abstract A novel framework for multi-lane factors (MLFs) for bridge traffic loading is proposed in this work. A general equation of MLF, consisting of a combination coefficient, a lane correction coefficient, and a share factor is established. The calculation methodology for lifetime MLF uses bivariate extreme-value theory based on coincident extreme lane loading events. Example application of the framework to a site using Weigh-In-Motion (WIM) data is demonstrated, in which traffic simulations ...
3 CitationsSource
#1Xuefei Shi (Tongji University)H-Index: 2
#2Zhen Cao (Tongji University)H-Index: 1
Last.Xin Ruan (Tongji University)H-Index: 7
view all 4 authors...
3 CitationsSource
#1Xin Ruan (Tongji University)H-Index: 7
#2Junyong Zhou (Tongji University)H-Index: 3
Last.Colin Christopher Caprani (Monash University, Clayton campus)H-Index: 14
view all 4 authors...
AbstractThis paper proposes a site-specific traffic load model for long-span multi-pylon cable-stayed bridge. Structural effects are primarily investigated based on influence lines, which are identified as either global effect (GE) or partial effect (PE) depending on the effective influenced region. GEs are further categorised as sensitive effect (SE), insensitive effect (ISE) or less sensitive effect (LSE), considering sensitivity to unbalanced traffic loading. Three on-bridge traffic states ar...
8 CitationsSource
#1Airong Chen (Tongji University)H-Index: 1
#2Dan M. Frangopol (Lehigh University)H-Index: 56
Last.Xin Ruan (Tongji University)H-Index: 7
view all 3 authors...
Source
#1Xuefei Shi (Tongji University)H-Index: 2
#2Zijie Zhou (Tongji University)H-Index: 1
Last.Xin Ruan (Tongji University)H-Index: 7
view all 3 authors...
AbstractIn recent years, several accidental collapses of girder bridges have occurred under the influence of eccentric heavy vehicles in China. To explore the causes and mechanisms of the collapses, a collapsed six-span, RC, continuous box-girder bridge was introduced and analyzed. By gathering onsite information about the accident, different failure forms were determined. Simplified mechanical calculations and finite-element simulations were used to determine the characteristics of the structur...
4 CitationsSource
#1Zijie ZhouH-Index: 1
#2Xuefei ShiH-Index: 2
Last.Xin RuanH-Index: 7
view all 3 authors...
Source
#1Xin Ruan (Tongji University)H-Index: 7
#2Junyong Zhou (Tongji University)H-Index: 3
Last.Colin Christopher Caprani (Monash University)H-Index: 14
view all 3 authors...
AbstractThe antisliding safety of the middle saddle is a key issue for the design of three-pylon suspension bridges. Vehicle load is the main adverse effect, especially unsymmetrical vehicle load. A general mechanical model on the saddle sliding behavior is reviewed and proposed, and then characteristics of load responses of the main cable are investigated to explore a simplified live load computational method. Based on the deterministic approach from codes and a reliability-based approach, the ...
8 CitationsSource
#1Xin Ruan (Tongji University)H-Index: 7
#2Zhiyi Yin (Tongji University)H-Index: 1
Last.Dan M. Frangopol (Lehigh University)H-Index: 56
view all 3 authors...
Recent studies indicate that absence of the consideration of risk attitudes of decisionmakers in the risk matrix establishment process has become a major limitation. In order to evaluate risk in a more comprehensive manner, an approach to establish risk matrices that integrates risk attitudes based on utility theory is proposed. There are three main steps within this approach: (1) describing risk attitudes of decisionmakers by utility functions, (2) bridging the gap between utility functions and...
16 CitationsSource
#1Zichao Pan (TU Delft: Delft University of Technology)H-Index: 1
#2Airong Chen (Tongji University)H-Index: 3
Last.Xin Ruan (Tongji University)H-Index: 7
view all 3 authors...
Abstract This paper mainly studied the spatial variability of the chloride caused by the inhomogeneous mesoscopic structure of the concrete in a numerical simulation approach. To conduct the research, a method to generate the random aggregate structure (RAS) based on elliptical and polygonal aggregates was firstly proposed. Secondly, the governing equation of the chloride diffusion process was numerically solved by the finite element method. Several important issues in this method, e.g, how to e...
14 CitationsSource
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