A Novel Construction Technology for Self-Anchored Suspension Bridge Considering Safety and Sustainability Performance

Abstract

To promote sustainable development of civil infrastructures, minimizing environmental impact and mobility disruptions have been elevated to a higher priority during decision-making for bridge construction scheme. This study presents a novel temporary pylon-anchor (TPA) technology for construction of self-anchored suspension bridges by considering not only safety performance, but also environmental impacts. A practical assessment method and index of sustainability associated with bridge construction technology are established to facilitate the selection of construction schemes. The sustainability index takes the environmental impact, traffic disruption, onsite construction materials and equipment, onsite construction cost, and onsite construction risk into consideration. The sustainability index associated with both conventional and novel construction methods is assessed and compared in this paper. Specifically, a novel girder-pylon antithrust system (GPAS) is proposed, which is the crucial component of the TPA technology in engineering application. In addition, an analytical approach is developed, considering both global load-carrying capacity and local stress distribution within the design and construction of the GPAS. The applicability and rationality of the proposed construction technology are illustrated by the successful application in real-world engineering. The field tests and sustainability assessment during the construction stage reveal that the proposed sustainability assessment method and analytical approach can facilitate the implementation of sustainable construction for self-anchored suspension bridges by considering both construction safety and sustainability.

Stress Analysis and Structural Optimization of Steel–Concrete Joint of Zhonghua Road Bridge in Liaocheng

“…The shell element shell181, the solid element solid185, and the link element link8 are, respectively, adopted for simulating the steel structure, the concrete, and the prestressed reinforcement in the finite element model; the steel plate is mainly divided into rectangular grids, while the solid concrete is divided into hexahedral grids to ensure the calculation accuracy. The initial strain theory is employed for applying the prestress [18][19][20], and initial strain is set up for link8. In this paper, due to the complex model and large size, the entire structure is divided into 785 one-dimensional elements, 5,13,437 two-dimensional elements, and 1,191,776 three-dimensional solid elements.…”

Calculation Method and Construction Process of Main Cable Alignment of Self Anchored Suspension Bridge

“…This is one of the main characteristics of suspension bridges different from other types of bridges. In the dead path, the main line produces a large initial tension while maintaining a specific geometric shape, which provides a strong geometric stiffness for the subsequent force to resist structural deformation [7].…”

Study on the application of deep learning technology and BIM model in the quality management of bridge design and construction stage

“…Among them, bridge construction is the core link in the transportation network, which can effectively solve the problem of inconvenient traffic on both sides of the river basin. The safety of bridges is a key consideration in the design and construction process of bridges, which can cause very serious traffic accidents if the quality is not up to par [3][4][5]. Safety problems not only cause national economic losses, but also have a destructive effect on the ecological environment to some extent [6][7][8].…”