Response spectrum of underground protective structures

Alwis, W. A. M.; Lam, K.Y.

doi:10.1016/0168-874x(94)90102-3

Cited by 12 publications

(12 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore only the first loading phase is considered Hinman 1988, 1991;Alwis and Lam 1994). As stated in the methodology, when analyzing the RBM, the structural deflection is ignored thus the structure is assumed as a rigid body.…”

Section: Rigid Body Motion Of the Entire Structurementioning

confidence: 99%

“…Further, the effects of structure motion on the soil flow near the structure and subsequent change in the structural loads and response were analyzed for a detonation very close to a structure (Baylot 2000). However, almost all the available analytical studies of underground structure dynamic response are based on single-degree-of-freedom (SDOF) models (Weidlinger and Hinman 1988;Alwis and Lam 1994;Chen and Chen 1996), which can be categorized into two approaches: 1) considering the entire structure as an rigid SDOF system, whereas the local response of the structural element is neglected; 2) simplifying a structural element as an SDOF system, whereas the global response of the structure was ignored. In fact, the SSI relies on the structural deformation;, therefore, a more appropriate consideration of the SSI requires adopting a continuous model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In-Structure Shock Assessment of Underground Structures with Consideration of Rigid Body Motion

Zhou

Chong

2011

J. Eng. Mech.

View full text Add to dashboard Cite

The present study assesses the in-structure shock of an underground structure induced by a nearby subsurface detonation. Both the rigid body motion of the entirely buried structure and the local response of the structural element are considered in characterizing the in-structure shock.Soil-structure interaction, behaving as an interfacial damping, is taken into account and the effect of different surrounding soils is investigated. A response spectrum is plotted for assessing in-structure shock induced by a typical subsurface detonation and subsequently the safety of the internal facilities and equipments mounted on the buried structure is evaluated. For safety purpose, the protective structures are better constructed in a site with small acoustic impedance and large attenuation factor. Results show that the proposed in-structure shock assessment method is effective and can be used as a supplement to TM-5-855-1 and TM-5-1300.

show abstract

Section: Rigid Body Motion Of the Entire Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-Structure Shock Assessment of Underground Structures with Consideration of Rigid Body Motion

Zhou

Chong

2011

J. Eng. Mech.

View full text Add to dashboard Cite

show abstract

“…The high risk of underground explosions necessitates careful research on the response of underground RC structures to these events. The dynamic response of underground RC structures to underground explosions has been numerically studied by several researchers [1][2][3]. Lu et al used 2-and 3-dimensional numerical models to analyze the response of underground structures subjected to subsurface explosions which occurred in the soil medium.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Experimental and Numerical Study of Blast Acceleration Created by Close-In Buried Explosion on Underground Tunnel Lining

Soheyli

Akhaveissy

Mirhosseini

2016

Shock and Vibration

View full text Add to dashboard Cite

Despite growing demands for structures in water transportation tunnels, underground installations, subsurface dams, and subterranean channels, there is limited field knowledge about the dynamic behavior of these structures in the face of near-fault earthquakes or impulse excitations. This study conducted a large-scale test on underground tunnel excited by two close-in subsurface explosions. The horizontal and vertical acceleration were recorded on the vertical wall of the tunnel and the free field data including the acceleration on the ground surface at 11-meter distance from the tunnel. The frequency domain analysis of recorded results determined the frequency 961 Hz and 968 Hz for 1.69 kg and 2.76 kg equivalent T.N.T., respectively. Then, finite element analysis results were compared with the test data. The comparisons demonstrated a good correlation and satisfied the field data. Finally, based on numerical modeling, a parametric study was applied to determine the effects of shear wave velocity distance of the crater with respect to the tunnel on impulse response of the tunnel.

show abstract

“…Further, Alwis and Lam (1994) studied the rigid body response of underground protective structures under exponentially decreasing blast load using an SDOF model.…”

Section: Research On In-structure Shock Of Underground Structuresmentioning

confidence: 99%

“…For a typical detonation case, the most important phase is the first one, in which the maximum acceleration and velocity of the entire structure always occur. Therefore only the first loading phase is considered Hinman 1988, 1991;Alwis and Lam 1994). As stated in the methodology, when analyzing the RBM, the structural deflection is ignored thus the structure is assumed as a rigid body.…”

Section: Rigid Body Motion Of the Whole Structurementioning

confidence: 99%

In-structure shock assessment and mitigation of structures

Zhou¹

View full text Add to dashboard Cite

, for their profound vision, research philosophy, invaluable guidance, and encouragement in conducting this research work. I will never forget Prof. Ma's enthusiam in research. From him, I not only learn how to do research, but also gain ability to deal with real engineering problems. His way of doing things influences my deeply. Prof. Zhao is very nice and kind. He teaches me an ever-holding rule in engineering, even the most beautiful formula is untrustable until it is valdated and confirmed by other means: numerical simulation or experiment. From Mr. Lim, I learn invaluable things in life. I also would like to appreciate the generous help by Prof. Masuhiro Beppu, National Defence Academy, Japan, who carried out the small scale test for me to validate my theoretical prediction. Prof. Yu Tongxi, Hongkong University of Science and Technology, teaches me not only knowledge on impact dynamics and metal foams, but also guided me in research through inspiring discussions. The research scholarship offered by Nanyang Technological University is gratefully acknowledged. Finally, I must acknowledge the long-lasting understanding, patience, encouragement and support provided by my wife, Wang Xiaojuan, without her, my life in Singapore would be dull and hard, and the completion of this thesis would not be possible. In my hard time, my father and friends always give me warm and powerful support. I am in memory of my mother.

show abstract

Response spectrum of underground protective structures

Cited by 12 publications

References 2 publications

In-Structure Shock Assessment of Underground Structures with Consideration of Rigid Body Motion

In-Structure Shock Assessment of Underground Structures with Consideration of Rigid Body Motion

Large-Scale Experimental and Numerical Study of Blast Acceleration Created by Close-In Buried Explosion on Underground Tunnel Lining

In-structure shock assessment and mitigation of structures

Contact Info

Product

Resources

About