A three-dimensional non-linear finite-element model (FEM) was constructed using a commercial software (ATENA-Studio) to investigate the transverse load distribution behavior of adjacent precast prestressed concrete box-girder bridges. An innovative connection between box girders used, where post-tensioning applied at top flanges only eliminating need for intermediate diaphragms. The FEM validat...

Abstract Problems in existing post‐tensioning structures with metallic ducts occur mainly related to corrosion of the tendons due chloride ingress at “weak points” structure. Despite this PT technology overall can be considered as proven and successful, sometimes severe damages collapses without warning are reported. As none inspection monitoring methods allows a complete meaningful evaluation ...

Unlike earth-anchored suspension bridges, self-anchored bridges (SASBs) involve a special construction stage, namely, suspender tensioning, in which the tensioning force and sequence are crucial complicated. Against this background, an example bridge A, SASB with steel-concrete composite beam, is introduced detail. Using MIDAS finite element software, scheme formulated based on combination meth...

Spider dragline silk has enormous potential for the development of biomimetic fibers that combine strength and elasticity in low density polymers. These applications necessitate understanding how silk reacts to different environmental conditions. For instance, spider dragline silk ;supercontracts' in high humidity. During supercontraction, unrestrained dragline silk contracts up to 50% of its o...

40 Shape memory alloys (SMAs) are a class of smart materials that recover apparent plastic 41 deformation (~6-8% strain) after heating, thus “remembering” the original shape. This 42 shape memory effect (SME) can be exploited for self post-tensioning applications and 43 NiTi-based SMAs are promising as SME is possible at elevated temperatures amenable 44 to practical application compared to con...

A mechanical device especially designed for the application of low-level posttensioning forces to glass fiber reinforced polymer (GFRP) bars was developed at the University of Missouri-Rolla. Some of the advantageous features of this device are that it is simple to assemble and the low-level post-tensioning forces can be applied manually and safely without the need for hydraulic jacks or heavy ...

Abstract At present, there is a problem of too much prestress loss in the construction multi-layer logistics warehouses China. To meet quality requirements project, this paper puts forward research on technology pretension prestressed reinforced concrete structure warehouse. The process can be effectively controlled by incorporating pre-tensioning into process, placing tendons, and tensioning o...

Abstract Post-tensioned precast concrete walls are an attractive research trend in structural engineering, which replaces cast-in-place earthquake-prone buildings. Precast use mild steel and high-strength post-tensioning for flexural resistance. Mild reinforcement yields tension compression, dissipating inelastic energy. Unbounded tendons used inside the wall to give self-centering capability, ...