The risk assessment and management of a long span cable stayed bridge under construction stage

The second Penang Bridge is a new bridge under construction in Penang, and will become the longest bridge in Malaysia and Southeast Asia. The purpose of this test is to estimate the bearing capacity of the form travelers in the second Penang Bridge. The pre-loading test simulates the construction stage of the typical edge beam and slab section. By observing the strain and deformation data of the form travelers, stress and displacement were analyzed to ascertain the performance and safety of form travelers and to provide evidence for the main beam alignment control in construction.

Download Full-text

Aerodynamic characteristics of a long-span cable-stayed bridge under construction

Engineering Structures ◽

10.1016/j.engstruct.2018.12.097 ◽

2019 ◽

Vol 184 ◽

pp. 232-246 ◽

Cited By ~ 9

Author(s):

Cunming Ma ◽

Qingsong Duan ◽

Qiusheng Li ◽

Haili Liao ◽

Qi Tao

Keyword(s):

Aerodynamic Characteristics ◽

Cable Stayed Bridge ◽

Long Span ◽

Under Construction

Download Full-text

Development of Multi-Tee-Type Precast Concrete Slabs with Insulating Materials for Structural Safety at the Construction Stage

Applied Sciences ◽

10.3390/app11041693 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1693

Author(s):

Jang-Woon Baek ◽

Su-Min Kang

Keyword(s):

Flexural Strength ◽

Precast Concrete ◽

Structural Safety ◽

Shear Reinforcement ◽

Loading Test ◽

Construction Stage ◽

Long Span ◽

Under Construction ◽

Construction Loads ◽

Dapped Ends

Multi-tee-type precast concrete (PC) slab systems are widely used for the construction of modular high-load long-span buildings. However, the structural safety of the dapped end is uncertain, owing to the unanchored shear reinforcement at the construction stage. This study proposes the use of clip-type shear reinforcement at the dapped ends of multi-tee PC slabs to secure their structural performance at the construction stage. To investigate the performance of this approach, a monotonic loading test was performed on simply supported PC slabs, considering structural safety at the construction stage. The reinforcement details of the PC slab’s dapped end (with existing Z-type or proposed clip-type shear reinforcement) and the shear-to-span ratio (12.8 or 6.4) were considered as test parameters. The load–deflection relationship, failure mode, strength ratios to the predicted strength, and shear reinforcement strains were analyzed. The results showed that the tested flexural strength ratio of the PC slabs at the construction stage to the design flexural strength was 1.20–1.40. The enclosed shape and diagonal arrangement of the clip-type shear reinforcement enabled sufficient anchorage performance at the dapped end, indicating that clip-type shear reinforcement can be viable for use at the dapped ends of PC slabs under construction loads.

Download Full-text

Numerical Analysis of Long-Span Cable-Stayed Bridge in the Construction Phase

The Open Civil Engineering Journal ◽

10.2174/1874149501509010896 ◽

2015 ◽

Vol 9 (1) ◽

pp. 896-905 ◽

Cited By ~ 1

Author(s):

Xue Chengfeng ◽

Liu Laijun ◽

Wu Fangwen ◽

Yang Caofang

Keyword(s):

Parametric Design ◽

Tension Stress ◽

Construction Stage ◽

Cable Stayed Bridge ◽

Long Span ◽

Fea Model ◽

Temperature Method ◽

Cable Force ◽

Sutong Bridge ◽

Stage Analysis

The fabrication and erection of cable-stayed bridges involve major changes in structure configuration through the addition and removal of structure components. In every stage of the construction process, adequate information on the constructed structure is important to determine the real structure situation for the analysis of errors and to verify construction requirements. The ultimate goals are to meet construction needs and identify the effects of modification in subsequent construction procedures. The final configuration of the structure is strongly dependent on the construction and fabrication procedures. In this regard, developing an FEA model to simulate the actual construction processes is necessary to determine the performance of a bridge under external loads. In this study, a general methodology for construction processes is presented to simulate a cable-stayed bridge. The stage-by-stage construction of the Sutong Bridge is simulated with ANSYS software package. The tensions of cables are realized with ANSYS parametric design language, element birth and death function, and mutliframe restart function. The objective of the construction stage simulation is to identify stresses and deformations of the steel box girder and the concrete towers, as well as the cable tension stress, to meet the design requirements. Results of the construction stage analysis showed that the temperature method could simulate the adjustment of the inclined cable force successfully, and the global stiffness of the Sutong Bridge was very small before closure. These findings served as the initial data for a dynamic research on the Sutong cable-stayed bridge.

Download Full-text