The Researches on Adaptability of Existed Large Span Railway Steel Bridges Under Heavy Haul Freight Train in China

Based on the original Electronically Controlled Pneumatic (ECP) brake system of the heavy-haul freight train and SIMULINK, in this paper we establishes the vehicle longitudinal dynamics model and a new braking control mode (deceleration control) in order to reduce the shock caused by the impulse of the vehicles to the coupler so as to lessen the danger of coupler fracture. The author adopts the Smith-PID control compensating method as the core of the deceleration control so as to control the vehicle longitudinal dynamics model. Furthermore, by calculating the variation of the coupler force and comparing with the results of the original braking force control method, theoretically we can draw conclusion that deceleration control has high feasibility and superiority.

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Response Evaluation of Large-Span Ultradeep Soil─Steel Bridges to Truck Loading

International Journal of Geomechanics ◽

10.1061/(asce)gm.1943-5622.0002159 ◽

2021 ◽

Vol 21 (10) ◽

pp. 04021186

Author(s):

Kareem Embaby ◽

M. Hesham El Naggar ◽

Meckkey El Sharnouby

Keyword(s):

Steel Bridges ◽

Response Evaluation ◽

Large Span ◽

Truck Loading

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A freight train dispatching approach for handling perturbations: a real case for the longest heavy-haul railway in China

Smart and Resilient Transport ◽

10.1108/srt-09-2020-0009 ◽

2020 ◽

Vol 2 (2) ◽

pp. 85-99

Author(s):

Yaqin Zhang ◽

Mingming Wang ◽

Ruimin Wang ◽

Zhipeng Li ◽

Nan Zhang

Keyword(s):

Traffic Management ◽

Programming Model ◽

Freight Train ◽

Integer Linear Programming Model ◽

Content Type ◽

Railway Traffic ◽

Alternative Graph ◽

Heavy Haul ◽

Heavy Haul Railway ◽

Large Primary

Purpose This paper aims to reschedule the freight train timetable in case of disturbance to restore the train services as soon as possible. Design/methodology/approach Hence, an integer linear programming model for the real-time freight heavy-haul railway traffic management is developed in case of large primary delays caused by the delayed cargos loading. The proposed model based on the alternative graph at the microscopic level depicts the freight train movements in detail. Multiple dispatching measures such as re-timing and re-ordering are taken into account. Moreover, two objective functions, namely, the total final delays and the consecutive delays, are minimized in the freight trains dispatching problem. Findings Finally, a real-world computational experiment based on the Haolebaoji-Ji’an freight heavy-haul railway is implemented. The results of all disrupted cases are obtained within 10 s. The results give insight into that the consecutive delays are more than the total final delays when the same disrupted situation and the consecutive or total final delays increase as the primary delays increase. Originality/value An integer linear programming model based on the alternative graph for the real-time freight heavy-haul railway traffic management is developed in case of large primary delays caused by the delayed cargos loading. The method can be developed as the computer-aided tool for freight train dispatchers.

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System Design for Express Freight Train Diagraming Programming

ICTE 2015 ◽

10.1061/9780784479384.313 ◽

2015 ◽

Author(s):

Xueyan Zhang ◽

Chenzhuo Yu ◽

Xing Huo ◽

Yao Lu

Keyword(s):

System Design ◽

Freight Train

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Curving Performance of Heavy-Haul Freight Wagons under Asymmetric Brake Shoe Pressures

Resilience and Sustainable Transportation Systems ◽

10.1061/9780784482902.006 ◽

2020 ◽

Author(s):

Kailong Zhang ◽

Pengfei Liu ◽

Yunqiang Cao ◽

Yifan Yan

Keyword(s):

Brake Shoe ◽

Heavy Haul ◽

Curving Performance ◽

Freight Wagons

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Translucent Glass Roofs For Large-Span Coverings

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.06.23-28 ◽

2019 ◽

pp. 23-28

Keyword(s):

Warm Season ◽

Natural Light ◽

Labor Costs ◽

Main Bearing ◽

Large Span ◽

Glass Panels ◽

Technical Properties ◽

Internal Volume ◽

Basic Approaches ◽

Smoke Removal

The article deals with the issues of glass use in the enclosing structures of large-span coverings, which have such advantages as ensuring the penetration of natural light, tightness, minimum labor costs for repair and maintenance. Design shortcomings: the high cost, the need for protection of the internal volume against the penetrating sun rays in the warm season (hothouse effect); arrangement of devices for operation of a roof. The key technical properties and characteristics of glass panels and pane-glass sets, constructive decisions, including interface to the main bearing structures of a large-span covering are given. Peculiarities of their design with due regard for ventilation and smoke removal, a drainage of condensate, ways of fight against frosting and snow drifts on the roof are reflected. Features of the account of loadings, the basic approaches to their calculation are considered. Various design solutions for the spatial metal trussed systems with the original nodal connections are presented. Information on modern solutions of translucent roofs using glass for large-span coverings is given.

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