This paper aims to provide an experimental support on seismic performance evaluation of the steel braced truss-RC (reinforced concrete) column hybrid structure, which could be applied as the air-cooled supporting structural system in large-capacity thermal power plants located in strong earthquake prone regions. A series of pseudo-dynamic tests (PDTs) and quasi-static tests (QSTs) were performe...

Overexposure to welding fume constituents, particularly manganese, is of concern in the construction industry due to the prevalence of welding and the scarcity of engineering controls. The control effectiveness of a commercially available portable local exhaust ventilation (LEV) unit was assessed. It consisted of a portable vacuum and a small bell-shaped hood connected by a flexible 2 inch (50....

be from pipe and connection breaks rather than structural failure of distribution reservoirs (as long as the reservoirs have been designed for lateral loading). Most of the examples of storage tanks and distribution reservoirs impacted by the 1994 Northridge and 1995 Hyogo-ken Nanbu earthquakes appear to have been of steel construction rather than of reinforced concrete or prestressed concrete ...

Pipe cleaning is currently the most effective method to improve cleanliness and corrosion resistance of pipes. In this paper, a new pipe proposed, combining mechanical chemical cleaning, offline tank online cycle cleaning. Through experiments characterization morphology changes, mechanism pickling passivation Q235 steel was explored, entire process microstructure changes on wall’s surface analy...

The use of the eddy current technique (ECT) for the non-destructive testing of conducting materials has become increasingly important in the past few years. The use of the non-destructive ECT plays a key role in the ensuring the safety and integrity of the large industrial structures such as oil and gas pipelines. This paper introduce a novel ECT probe design integrated with the distributed ECT...

In the application of guided waves NDT, the selection of exciting frequency is not only related with the setup of sensor, but also with the characteristics of pipe’s structure and material. In this paper, the characteristic of guided waves propagation in pipes that L(0,1) and L(0,2) have a cutoff frequency are respectively discussed, and the calculation formulas of their cutoff frequency are gi...

The joint general model of reliability and availability of complex technical systems in variable operation conditions linking a semi-markov modeling of the system operation processes with a multi-state approach to system reliability and availability analysis and linear programming considered in the paper Part 1 are applied in maritime industry to reliability, risk and availability optimization ...

Finding efficient and less expensive techniques for different aspects of culvert inspection is in great demand. This study assesses the potential infrared thermography (IRT) to detect presence cavities soil around a culvert, specifically adjacent pipe galvanized culverts. To identify cavities, we analyze thermograms, generated via long pulse thermography, using absolute thermal contrast, princi...

The causes of longitudinal crack in gas pipeline during pressure were analyzed by means mechanical property test, microstructure analysis, sem analysis and energy spectrum analysis. results show that the leakage L415M spiral submerged arc welded pipe is caused contact between base material steel low-melting copper alloy process high temperature, resulting brittleness liquid metal. Specifically,...