Contents: Undisturbed Sampling of Sands; The Sampling Disturbance in Sands: Its Evaluation and Influence on Strength Properties; Experimental Investigation of the Effect of Tube-Sampling on Cyclic Strength Characteristics of Sands; Experimental Investigation of the Effect of Block Sampling on the Cyclic Strength Characteristics of Sands; Undisturbed Sampling of Sands by Freezing and Coring; Influence of the Disturbances caused by Sample Transportation and Sample Handling in the Laboratory on Cyclic Strength Characteristics of Sands; and Conclusions.

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Earthquake engineering is the ultimate challenge for structural engineers. Even if natural phenomena such as earthquakes involve great uncertainties, structural engineers need to design buildings, bridges, and dams capable of resisting the destructive forces produced by earthquakes. However, structural engineers must rely on the expertise of other specialists to realize these projects. Thus, this book not only focuses on structural analysis and design, but also discusses other disciplines, such as geology, seismology, and soil dynamics, providing basic knowledge in these areas so that structural engineers can better interact with different specialists when working on earthquake engineering projects."

Discontinuities such as cracks, fissures, bedding planes, etc. resulting from different geological processes are commonly found in rock masses and often play a critical role in the initiation, propagation, and coalescence of new cracks due to stress redistribution caused by engineering activities and natural disturbances. It is challenging to determine the instability mechanism of jointed rock masses but it is vital for estimating instability disasters in jointed rock engineering.