Abstract:In this paper, the damage localization of prestressed reinforced concrete is studied by using curvature modulus, the displacement modulus of the structure is calculated by using finite element method, and the curvature modulus curve is obtained by using differential computation based on the displacement modulus obtained, and the numerical results show that the change of curvature modulus curve exists for the damage of the structure, and the localization is feasible.

Abstract:Anchor cable frame girder is a commonly used form of support in slopes. For the calculation of internal force of lattice girder in frame form, the lattice girder is usually simplified as a single continuous girder, and then the appropriate foundation model is selected and solved by the corresponding principal relationship [1]. This thesis focuses on the applicability of Winkler foundation model and elastic half-space foundation model in the calculation of internal forces of lattice beams.

Abstract:Carbon fiber reinforced composite (CFRP) reinforcement has excellent properties such as light weight, high strength, corrosion resistance, and fatigue resistance, which makes it very suitable for making bridge ties for use in harsh operating environments. Due to the low transverse and shear strengths of CFRP tendons, a key issue in the fabrication of cables with CFRP tendons is the development of a suitable anchorage system. In this paper, a 7-wire CFRP bar bonded anchorage was developed for 7-mm diameter round CFRP bars. The static load test was carried out on the successfully developed 7-wire CFRP ropes, and the results showed that the stress strength of the successfully developed multifilament CFRP ropes was up to 2200MPa, and the anchorage anchorage efficiency was more than 95%.

Abstract:Anchor corrosion coupling effect is one of the difficult problems in anchor durability research. This paper summarizes the corrosion environment, test methods, test results and conclusions of a batch of downsized anchor rods buried in the project site at an early stage, which are still under research on the corrosion coupling effect of anchor rods, and can be used as a reference for the readers.

Abstract:Rust-free anchor cable is a new type of non-metallic anchor cable recently developed by the Institute of Prospecting Technology. Through the study of domestic and foreign anchor cable body, pressure pad, external anchorage, ancillary components, tensioning device, the overall structure of the anchor cable and anchor cable construction process, as well as two rounds of field tests, the results show that the non-corrosive anchor cable, with its unique performance, anchored in a special anchoring environment, is more effective and reliable than the steel anchors, and therefore has a great potential for the market!

Abstract:This paper mainly introduces the process and technical points of ZLD automatic continuous hydraulic lifting system in Guiyang Guanshan Bridge beam lifting construction.

Abstract:The paper introduces the optimized construction of cable-stayed cable adjustment of South Taihu Lake Bridge. Through the optimization of the cable-stayed bridge construction process at various stages and under different working conditions, the cable-stayed cable force and the final cable force at the time of constant load of the bridge are optimized to ensure the reasonable structural stress and construction safety, so that the structural stress after the bridge is completed and the whole bridge line is more reasonable.

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