Modeling of a bridge with a BVSP structure
Posted: Sun Dec 22, 2024 8:32 am
Designing and building modern railway lines requires a responsible approach and making error-free decisions. BIM modeling is becoming an effective tool for performing these tasks today, as discussed by design engineer Ksenia Grigorieva and telegram in philippines team leader Daniil Grigoriev from NPS ST at the PRO TIM INFRA event.
In their report, they presented an example of developing a model of a ballastless track superstructure (BTS) for a high-speed highway in the Midas product environment. It was this environment that allowed them to model and issue design documentation in a single information space.
Ksenia Grigorieva identified the following as the main goals of this stage of work: assessment of the possibility of modeling the structure in the Midas environment, optimization of the model to obtain drawings and specifications and its subsequent export to the Midas Civil calculation complex with an assessment of the quality of data transfer.
The expert also described the design of the ballastless track superstructure developed by the company: it is intended for highways with a design speed of up to 400 km/h and has increased strength and durability, and is also subject to a minimum level of vibration and deformation. Its main elements include:
Reinforced concrete foundation slab
Intermediate layer of concrete
Separating layer thickness about 3 mm
Prestressed concrete rail slab
For direct modeling, sections with the following parameters were selected: two box-section spans, each 32.6 m long, and one continuous span, 160.4 m long.
Modeling process
The task began with the creation of abutment and support elements in the point library. This library allows you to create element shapes that do not depend on changes in the longitudinal profile and route plan.
The next step was to create span structures in the curve library. This library differs from the point library in that it allows the shape of elements to be changed depending on the plan and longitudinal profile of the bridge. This allows the model to be quickly adjusted without changing the span length.
The detailed model, shown by the speakers to the conference audience, included the development of all structural elements: spacers, bolts, connections and other parts. Particular attention was paid to the separating and intermediate layers of the foundation slab, for which variable parameters were set. This made it easy to adapt the structure to different bridge sizes and operating conditions.
In their report, they presented an example of developing a model of a ballastless track superstructure (BTS) for a high-speed highway in the Midas product environment. It was this environment that allowed them to model and issue design documentation in a single information space.
Ksenia Grigorieva identified the following as the main goals of this stage of work: assessment of the possibility of modeling the structure in the Midas environment, optimization of the model to obtain drawings and specifications and its subsequent export to the Midas Civil calculation complex with an assessment of the quality of data transfer.
The expert also described the design of the ballastless track superstructure developed by the company: it is intended for highways with a design speed of up to 400 km/h and has increased strength and durability, and is also subject to a minimum level of vibration and deformation. Its main elements include:
Reinforced concrete foundation slab
Intermediate layer of concrete
Separating layer thickness about 3 mm
Prestressed concrete rail slab
For direct modeling, sections with the following parameters were selected: two box-section spans, each 32.6 m long, and one continuous span, 160.4 m long.
Modeling process
The task began with the creation of abutment and support elements in the point library. This library allows you to create element shapes that do not depend on changes in the longitudinal profile and route plan.
The next step was to create span structures in the curve library. This library differs from the point library in that it allows the shape of elements to be changed depending on the plan and longitudinal profile of the bridge. This allows the model to be quickly adjusted without changing the span length.
The detailed model, shown by the speakers to the conference audience, included the development of all structural elements: spacers, bolts, connections and other parts. Particular attention was paid to the separating and intermediate layers of the foundation slab, for which variable parameters were set. This made it easy to adapt the structure to different bridge sizes and operating conditions.