Seismic behaviour of timber-laced stone masonry buildings before and after interventions: shaking table tests on a two-storey masonry model

2017 ◽  
Vol 16 (2) ◽  
pp. 803-829 ◽  
Author(s):  
Charalambos Mouzakis ◽  
Chrissy-Elpida Adami ◽  
Lucia Karapitta ◽  
Elizabeth Vintzileou
Keyword(s):  
Shaking Table ◽  
Stone Masonry ◽  
Masonry Buildings ◽  
Shaking Table Tests ◽  
Seismic Behaviour ◽  
Before And After

Shaking Table Tests on Multi-Leaf Stone Masonry Structures: Analysis of Stiffness Decay

2010 ◽  
Vol 133-134 ◽  
pp. 647-652 ◽  
Author(s):  
Nicola Mazzon ◽  
Cano M. Chavez ◽  
Maria Rosa Valluzzi ◽  
F. Casarin ◽  
Claudio Modena
Keyword(s):  
Dynamic Behaviour ◽  
Shaking Table ◽  
Stone Masonry ◽  
Mode Shapes ◽  
Masonry Structures ◽  
Shaking Table Tests ◽  
Grout Injection ◽  
Hydraulic Lime ◽  
Natural Hydraulic Lime ◽  
Before And After

The influence of the natural hydraulic lime-based grout on the dynamic behaviour of injected multi-leaf stone masonry elements is discussed in the paper. Shaking table experiments on two stone masonry buildings, tested before and after grout injection, have been performed. The paper focuses on the analysis of both the recorded accelerations and related displacements, at the bottom and at each further storey. This leads to evaluate the stiffness of the unstrengthened and injected structures. The input at increasing PGA allowed the stiffness decay to be studied, simulating a gradual damaging of the structures. These results were also interpreted in the light of both computed frequencies and mode shapes. Finally, the comparison among these results, obtained from all the models, allows to deepen the knowledge concerning the effects induced by the lime-based grout injection and on its capability to modify the dynamic behaviour, when intervening on a damaged (repairing) or on an undamaged (strengthening) structure.

Numerical Simulation of Shaking Table Tests on Full-Scale Stone Masonry Buildings

2015 ◽  
Vol 10 (2-3) ◽  
pp. 146-163 ◽  
Author(s):  
Andrea Penna ◽  
Ilaria Senaldi ◽  
Alessandro Galasco ◽  
Guido Magenes
Keyword(s):  
Numerical Simulation ◽  
Full Scale ◽  
Shaking Table ◽  
Stone Masonry ◽  
Masonry Buildings ◽  
Shaking Table Tests

Seismic Response of Concrete-Canvas Reinforced Slopes: Influence of Tilt Degrees for Reinforcement

2020 ◽  
Vol 14 (03) ◽  
pp. 2050011
Author(s):  
Lin Zhou ◽  
Guangya Ding ◽  
Jie Tan ◽  
Xiaoxia Zhao ◽  
Jun Wang
Keyword(s):  
Seismic Response ◽  
Threshold Level ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Slope Surface ◽  
Reinforcing Effect ◽  
Failure Patterns ◽  
Coral Sand ◽  
Before And After ◽  
Reinforced Slopes

A series of shaking table tests were conducted on reinforced slopes to study the slope dynamic characteristics. The influence of concrete-canvas tilt degrees on the seismic response was studied. By considering the effects of different concrete-canvas tilt degrees, the seismic responses of the reinforced slopes were analyzed, along with the accelerations, crest settlements, and horizontal displacements. The failure patterns of different model slopes were compared using white coral sand marks placed at designated elevations to monitor the internal slide of the reinforced slopes. Several round markers were placed on the slope surface to compare the deformation before and after shaking with different amplitudes. The results indicated that with the increase in concrete-canvas tilt degrees, a better reinforcing effect was obtained, and 30° reinforcement reached a threshold level, the slide-out point shifts from the crest of the slope to the middle of the reinforced model. The bottom 2/7th zone of the slope was relatively stable during the earthquake and the reinforcement was ineffective at the bottom of the slope. When both considered the influence of reinforcing effect and construction difficulty, 20° is the suitable tilt degree in concrete-canvas reinforced slopes. The characteristics of increasing strength of the concrete canvas make it suitable for the application in slope protection.

Shaking Table Tests of a Typical Mexican Colonial Temple: Evaluation of Two Retrofitting Techniques

2013 ◽  
Vol 29 (4) ◽  
pp. 1209-1231 ◽  
Author(s):  
Marcos Chávez ◽  
Roberto Meli
Keyword(s):  
Energy Dissipation ◽  
Research Program ◽  
Maximum Intensity ◽  
Shaking Table ◽  
Scale Model ◽  
Stone Masonry ◽  
Significant Source ◽  
Second Phase ◽  
Shaking Table Tests ◽  
Displacement Capacity

This paper reports the results of the second phase of a research program that carried out shaking table tests on a scale model of a typical stone masonry temple. This second phase evaluates the efficacy of two different retrofitting techniques by comparing the response of the retrofitted models with that of the original unreinforced model. It was found that both retrofitting schemes substantially enhanced the performance of the model temple. The maximum intensity of the base motion for which damage was considered to be still repairable increased by 80% and 120% for the first and the second levels of retrofitting, respectively. In terms of displacement capacity, the response of the model with the second level of retrofit reached a maximum drift of 0.4%. The initial damping ratios were found to be in the range of 7% to 9%, both in the original and the retrofitted models. These ratios constitute a significant source of energy dissipation for this kind of structure.

scholarly journals Examining the seismic behaviour of partially saturated sand using centrifuge shaking table tests

2019 ◽  
Vol 92 ◽  
pp. 17002
Author(s):  
Zitao Zhang ◽  
Jianzhang Xiao ◽  
Yingqi Wei ◽  
Hong Cai ◽  
Jianhui Liang ◽  
...  
Keyword(s):  
Effective Stress ◽  
Experimental Results ◽  
Shaking Table ◽  
Degree Of Saturation ◽  
Saturated Sand ◽  
Shaking Table Tests ◽  
Seismic Behaviour ◽  
Liquefaction Resistance ◽  
Partially Saturated ◽  
Partially Saturated Sand

Similar to fully saturated sand, the partially saturated sand can also liquefy under certain conditions during earthquakes. This study aims to characterize the seismic behaviour of partially saturated sand. Centrifuge shaking table tests were performed using the IWHR horizontal-vertical centrifuge shaker. The experimental results indicate that the liquefaction resistance of the partially saturated sand increases with decreasing the degree of saturation and with increasing the initial effective stress right before shaking. The boundary between the liquefied and un-liquefied sand becomes deeper and deeper during shaking.

Shaking Table Tests Validating Two Strengthening Interventions on Masonry Buildings

2008 ◽  
Author(s):  
Gerardo De Canio ◽  
Giuseppe Muscolino ◽  
Alessandro Palmeri ◽  
Massimo Poggi ◽  
Paolo Clemente ◽  
...  
Keyword(s):  
Shaking Table ◽  
Masonry Buildings ◽  
Shaking Table Tests
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