Fatigue of cable anchorages on a cable-stayed bridge

Studies have shown that the connection details used for cable anchorage blocks on cablestayed bridges have the potential for fatigue damage due to fluctuating stresses generated by the cyclic traffic loads passing over the bridge. To investigate the fatigue damage and determine the remaining fatigue life of a cable anchorage block used on a cable-stayed bridge, finite element (FE) analyses were undertaken by using the Fatigue Load Model 4 (FLM 4) proposed by the Eurocodes to identify the most fatigue-critical locations within the details

Mechanical Properties of Concrete with Recycled Aggregate

In this study, the idea of using waste product is done by recycling the concrete coarse aggregate (RCCA) as a replacement material for normal coarse aggregate. The objective of this study concentrates on mechanical properties that are compressive and flexural strength of concrete with RCCA. 50% and 100% of RCCA were used to replace the normal coarse aggregate and tested on 7, 14 and 28 days age of concrete. The strength of normal concrete as control mix has been compared with the concrete with RCCA. The result revealed that the normal concrete present the highest compressive and flexural strength and followed by concrete with 100% and 50% RCCA. As a conclusion, RCCA reduced the compressive and flexural strength of concrete but still achieve targeted strength for concrete used in construction

Behaviour of perforated built-up cold-formed steel sections with edge and web stiffeners

This paper presents the experimental investigation of various perforation positions influence on C-sections cold-formed steel with edge and web stiffeners assemble as built-up open section subjected to axial compressive load. The built-up sections been setup as back-toback by using self-tapping screws connected at web on two longitudinal lines of 100 mm spacing. The sections is then fabricated as 600 mm short column structures with both ends are fix-welded to 20 mm thickness of bearing supports. Total of 16 nos of specimens consist of both conventional and modified 1.2 mm thickness built-up C-sections with the sequence positions of elongated circle perforations whether as absent or present as in single or multiple openings. The strength of the columns as the results of ultimate load by caused of the location of perforation even if at middle section or near end section are tabulated. The results show that the establishment of stiffeners may increase the strength of the column. However, the effects of perforation when as a multiple openings and the position is closer to the support will reduce the strength