Households and the labour market for local areas
AbstractThe latest annual Statistical Bulletin on 'Work and worklessness among households' was published by the Office
for National Statistics on 26 August 2009. It gives information about working-age households, and about the adults and
children living in them, by household economic activity status. It includes estimates of workless working-age
households, and the adults and children living in them, by household type, region, and ethnicity. This article, using the
Annual Population Survey, considers more detailed geographical breakdowns of the same information. Detailed tables
reporting the sub-regional data can be found in an online version of this article which is available at: www.statistics.
gov.uk/articles/nojournal/householdslabourmarket-local-areas.pdf.
Quality measures
of household
labour market
indicators
AbstractThis article considers the reliability of
the two main survey sources for key
household labour market indicators, using
standard errors to inform users on the
accuracy of regular household analysis.
It shows the level of detail that provides
reliable analysis for different geographies.
It will also consider when to use the
Annual Population Survey (APS) instead
of the Labour Force Survey (LFS, see ONS
2009a).
Experimental study on bond behavior between high-strength grout and deformed steel bars
Abstract Engineers use high-strength grout to connect precast concrete members for its low shrinkage and good fluidity. This paper designed 87 central pull-out specimens using the control variable method to investigate the influence of factors on the rebar-grout bond property such as compressive strength, steel grade, bar diameter, transverse stirrups, and bond length. The test result showed that improving grout compressive strength (85.8 MPa–122.7 MPa) cannot improve the bond strength, which was different from the previous conclusions of concrete pull-out tests. Simplified formulas were presented for calculating the characteristic values of bond strength, residual strength, peak slip, and relative slip of load-holding platform based on parameter analysis. Then, a constitutive model was proposed to predict the full-range bond stress-slip curve of high-strength grout and steel bar specimens from bearing to failure. Finally, FEA models were established to evaluate the applicability and accuracy of the constitutive model.