In order to solve the water sealing problem of soil between pipes of long distance curved pipe-jacked technology, Freeze-Sealing Pipe Roof (FSPR) as an innovative pre-supporting method in tunnel engineering is being applied to the Gongbei Tunnel in the Hong Kong-Zhuhai-Macau Bridge. The definition of FSPR is that large diameter steel pipes are laid out in a circle around the cross section of tu...

This paper describes sixteen fire tests conducted on slender circular hollow section columns filled with normal and high strength concrete, subjected to concentric axial loads. The test parameters were the nominal strength of concrete (30 and 80 MPa), the infilling type (plain concrete, reinforced concrete and steel fiber reinforced concrete) and the axial load level (20% and 40%). The columns ...

Abstract In order to study the influence of arrangement thermal insulation floor on and mechanical properties hollow slab, ABAQUS is used establish model analysis behavior slab. By investigating distribution temperature, heat flux, damage deformation floor, mid-span deflection other characteristics section, it concluded that although transmission can be effectively obstructed by will transferre...

Polyvinylidene fluoride/polyvinylpyrrolidone (PVDF/PVP) hollow fiber membranes were fabricated by dry-jet wet-spinning process. The correlated effects of the air gap length and PVP concentration ((1) the air gap length effect at the low and high PVP concentration in the dope solutions, as well as (2) the effect of the PVP concentration at the same air gap length) on the cross-section structure ...

Small loop antennas such as the AEA-Isoloop sometimes use rectangular cross section conductors, and sometimes use circular cross section tubing for the antenna element. In these antennas, resistive losses are important in determining the efficiency. Here, I approximately calculate the resistance of rectangular cross section elements. For design purposes my results can be summarized by the equat...

The present study experimentally investigates the fatigue strength of longitudinally loaded welded joints in beam structures made ultra-high-strength steel. Hereby, effects different manufacturing methods and welding preparations on crack initiation locations box I section beams are evaluated. Specifically, experimental tests carried out these prepared with manual automatic welding, subjected t...