Preview |
1 General
1.0.1 This code is formulated to unify the technical standards for design of highway bridges and culverts, implement the relevant laws/regulations and highway technology policies by the state and make the design of highway bridges and culverts meet the requirements on advanced technology, safety, reliability, applicability, durability, economy and rationality.
1.0.2 This code is formulated on the basis of the principles set forth in Unified standard for reliability design of highway engineering structures (GB/T 50283) and the relevant provisions set forth in Highway Engineering Technique Standards (JTG B01) by Ministry of Communications.
1.0.3 This code is applicable to the structural designs of newly-built and rebuilt highway bridges and culverts of all levels.
1.0.4 The line shapes of highway bridges and culverts shall harmonize the overall layout of the line.
1.0.5 Highway bridges and culverts shall be designed in considerations of the role, properties and future developing demands in the highway, which shall accord with the principles on beautiful appearance and favorable for environmental protection, other than the requirements contained in Article 1.0.1, and it shall also consider such factors as local conditions, local materials and convenience for constructions and maintenance, etc.
The bridges and culverts adopting standard span shall adopt prefabricated structure to facilitate mechanized and factory-oriented constructions.
1.0.6 The design reference period of highway bridges and culverts shall be 100 years.
1.0.7 Bridge and culvert structures shall be designed for bearing capacity limit state and normal service limited state.
1) Bearing capacity limit state: it corresponds to the deformation or displacement where bridge and culvert structure or its structural members have reached maximum bearing capacity or can bear no more load.
2) Normal service limited state: it corresponds to the state where bridge and culvert structure or its structural members have reached certain limit values for normal service or durability
When conducting designs for abovementioned two kinds of limit states, it shall satisfy the requirements on structure and technique as well.
1.0.8 It shall consider following three design situations and conduct corresponding limit state designs based on different actions (or loads) of highway bridges and culverts, their effect to bridges and culverts and the environment in which bridges and culverts are allocated.
1) Persistent situation: it is a situation where bridges and culverts have to bear dead weight and vehicle loads, etc, for a long time after completion. Under this situation, it is necessary to conduct limit state designs for bearing capacity and limit state designs for normal service to bridges and culverts.
2) Transient situation: it is a situation where bridges and culverts shall bear temporary actions during constructions. Under such situation, it only needs to conduct the limit state design for bearing capacity, and the limit state design for normal service be conducted only when it is necessary.
3) Accidental situation: it is a situation casually occurred during the service of bridges and culverts. Under such situation, it only needs to conduct the limit state design for bearing capacity
|
中文版 
English
