This article studies a concrete hollow slab simply supported-continuous actual engineering project in certain city. Before the reinforcement of bridge, there were cracks and exposed rebars, etc. In order to ensure safe operation method was adopted, prestressed steel strands are used convert simple-supported structure into continuous structure, thereby improving structural load-bearing capacity ...

Bridge material selection has traditionally been b~ed on e.ngineering and economi~ criteria. With the increasing interest of the public, industry, and government m sustainable:: development, en~lronmental. assessment in construction is becoming more important. However, we need metrtcs and data on deSign alternatives for effective decision making. In this paper, we present results of a life cycl...

The collapse resulted in the media’s search for immediate answers to the following two questions; why did the bridge collapse and who is to blame? Speculative answers to the first question were proposed by the “Average Joe” and structural engineering experts alike, and involved the usual suspects; the growth from microscopic to catastrophic lengths of undetected cyclic load-induced fatigue crac...

Oscillators are kernel components of electrical and electronic circuits. Discussion of history, mechanisms and design based on Barkhausens observation. Discussion of a Wien Bridge oscillator based on the question: Why does this circuit oscillate ?