Abstract:The columnless lobby of Tower C in Lenovo Park adopts a structural form that combines suspension cables, stay cables, and wind cables. It adopts pre-stressed technology, combined with point glass curtain walls, and the overall structure perfectly integrates with architectural requirements. This article introduces its structural design and wind tunnel testing

Abstract:This article briefly introduces the design characteristics of bonded prestressed flat beams for the Chongqing Langgao Hyatt Hotel project. In the design, the finite element program is used to analyze the influence of beam column stiffness on the axial preload of the beam. By reserving post pouring strips for columns and walls, the constraint effect of vertical components on prestressed beams is reduced, and the secondary axial force in the beams is reduced, making the design economical and reasonable. It has certain reference value for similar engineering designs

Abstract:The Fangyuan Building is a landmark building with extraordinary architectural concepts and strange exterior shapes. Its complex structural system and numerous design and construction difficulties bring challenges to both design and construction, as well as opportunities for innovation. The design and construction difficulties of this project include large-span prestressed transfer truss and prestressed self balanced tension beam column system. This project boldly explores and innovates the concept and construction technology of prestressed structure design, and has achieved valuable experience and results. To achieve an organic unity between the meaning of architecture and its structural functions

Abstract:The Shanghai Maglev Railway is the world's first commercial maglev railway. During its construction process, scientific and technological personnel overcame many technical difficulties. Among them, the most challenging technical aspect in civil engineering is the production of prestressed track beams. Due to the special requirements for the performance of maglev track beams, their manufacturing accuracy is extremely high. The most important aspect during the construction process is the tension control of pre tensioning and post tensioning during the production of prestressed track beams. The article analyzes and introduces the technical characteristics of vibrating wire sensors and the development, development, and application of vibrating wire anchor cable force measuring instruments

Abstract:In order to study the weakening mechanism of new composite anchorage structures and their characteristics under static load, static Triaxial shear test were carried out. Research shows that: ① compared with non weakened specimens, the average deformation of weakened specimens is 2.7 times that of the latter, with a maximum of 7.3 times, and the average bearing capacity is 1.8 times that of the latter, with a maximum of 3.2 times; ② When the anchor rod in the non weakened specimen has reached a very high strain state or the specimen has undergone ultimate failure conditions, the anchor rod in the weakened specimen is still in a very low strain state; ③ The "canyon" phenomenon in the load-strain relationship curve of the weakened specimen is the result of overloading and failure of the pore wall medium between the weakened pores due to stress concentration, causing relative unloading of the specimen. The occurrence of multiple "canyon" phenomena essentially reflects the entire process effect of the pore wall medium from fracture, fragmentation to compaction; ④ The weakening effect of composite anchoring structures is very significant, with great potential. Fully utilizing this potential will have enormous social, economic, and military benefits

Abstract:This article takes the Wenhui Bridge in Liuzhou as an example to introduce a new method for replacing the suspension rods of a steel tube concrete arch bridge. It uses steel wire strands with small anchor head diameter and excellent anti-corrosion performance to replace steel wire cables protected by severely corroded cement mortar, which better meets the needs of practical engineering

Abstract:The Hemaxi Extra Large Bridge on the Jiangzhu Expressway is currently the first span low tower cable-stayed bridge in China, and it is also the first low tower cable-stayed bridge to use epoxy sprayed steel stranded wire finished cables. This article mainly introduces the construction technology of the cable-stayed bridge, providing reference and experience for the construction of similar bridges in the future

Abstract:(Continued from previous issue)