For the 60-story frame, optimum designs from ensemble of independent runs produce frame weights within 2% of results found using deterministic methods, with some only addressing serviceability (drift) requirements.
The application of fibre reinforced polymer (FRP) or steel reinforced polymer (SRP) materials to the tension side of a reinforced/prestressed concrete member has been accepted as a strengthening technique to increase the load carrying capacity and in some cases can enhance member serviceability.
Although this criterion may be sufficient for the serviceability of highway bridges, some revisions may be essential for railway bridges (due to heavier axle loads and relevant dynamic effects), especially for long-span conditions (Peck and Peck 1984).
Therefore, the stress in the steel reinforcement will always need to be limited to some extent in order to prevent cracking from affecting serviceability of the structure.
With the main focus on safety, design of structures for vibration serviceability is often overlooked or mismanaged, resulting in some high profile structures failing publicly to perform adequately under human dynamic loading due to walking, running or jumping.
Contrary to the current practice in some design codes, pure tension cracks are more detrimental to the serviceability of the structure than other types of cracks and must be treated more cautiously.
However, in late 2013 through early 2014, some reviewers have noted the lack of internal expandability, second CPU, serviceability, and questioned the then-limited offerings via Thunderbolt 2 ports.
Some will make a purchasing decision on what really matters; safety, performance, serviceability.
Serviceability limit states of deflection and vibration are addressed with some general code guidelines and a nonmandatory commentary.
A widely accepted approach for quantifying the serviceability short term deflection of RC beams is to use some combination of the flexural rigidities of the uncracked (EIfi-uncr) and cracked (EIfi-cr) sections that are obtained from a full-interaction analysis of transformed sections; a full-interaction analysis implies that there is no slip between the reinforcement and concrete.
