scholarly journals Experimental estimation of energy dissipated by multistorey post-tensioned timber framed buildings with anti-seismic dissipative devices

2021 ◽  
Vol 1 (2) ◽  
Keyword(s):  
Seismic Performance ◽  
Environmental Sustainability ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Braced Frame ◽  
Timber Frame ◽  
Experimental Estimation ◽  
Energy Dissipated ◽  
The University ◽  
Post Tensioned

The need to satisfy high seismic performance of structures and to comply with the latest worldwide policies of environmental sustainability is leading engineers and researchers to higher interest in timber buildings. A post-tensioned timber frame specimen was tested at the structural laboratory of the University of Basilicata in Italy, in three different configurations: i) without dissipation (post-tensioning only-F configuration); ii) with dissipative angles (DF- dissipative rocking configuration) and iii) with dissipative bracing systems (BF - braced frame configuration). The shaking table tests were performed considering a set of spectra-compatible seismic inputs at different seismic intensities. This paper describes the experimental estimation of energy dissipated by multistorey post-tensioned timber prototype frame with different anti-seismic hysteretic dissipative devices used in the DF and BF testing configurations. The main experimental seismic key parameters have also been investigated in all testing configurations.

scholarly journals Seismic Protection of Cabinet Stored Cultural Relics with Silicone Dampers

2018 ◽  
Vol 2018 ◽  
pp. 1-15
Author(s):  
Xiaoqing Ning ◽  
Junwu Dai ◽  
Wen Bai ◽  
Yongqiang Yang ◽  
Lulu Zhang
Keyword(s):  
Numerical Simulation ◽  
Seismic Performance ◽  
Shaking Table ◽  
Seismic Protection ◽  
Shaking Table Tests ◽  
Seismic Methods ◽  
Cultural Relics

Cultural relics are precious properties of all humankind, the damage of which is nonresilient. In previous earthquakes, stored cultural relics have shown poor seismic performance, so effective seismic methods are urgently needed. However, due to various restrictions, traditional damping methods are not suitable for the cultural relics stored in the Palace Museum. An efficient damping method, composed of silicone damper and connecting elements, is proposed to protect these stored cultural relics. This novel damping device is very convenient to install and no change or move for the original structures is needed. It is suitable for various kinds of new and existing relic cabinets. In order to validate the effectiveness of this novel damping method, both numerical simulation and shaking table tests are carried out. Results show that this method can effectively enhance the seismic performance of relic cabinet itself and the internal cultural relics. Relic cabinets with damping devices deform significantly less than noncontrol cabinets while the inside relics also have less sliding or overturning. Overall, a damping method, designed for seismic protection of cabinet stored cultural relics, is proposed and its effectiveness has been successfully demonstrated.

Shaking Table Tests of Post-Tensioned Rocking Bridge with Double-Column Bents

2019 ◽  
Vol 24 (8) ◽  
pp. 04019080 ◽  
Author(s):  
Yu-Long Zhou ◽  
Qiang Han ◽  
Xiu-Li Du ◽  
Zhen-lei Jia
Keyword(s):  
Shaking Table ◽  
Shaking Table Tests ◽  
Post Tensioned

Shaking table tests on the seismic performance of a flexible wall retaining EPS composite soil

2017 ◽  
Vol 15 (12) ◽  
pp. 5481-5510 ◽  
Author(s):  
Hongmei Gao ◽  
Ying Hu ◽  
Zhihua Wang ◽  
Chao Wang ◽  
Guoxing Chen
Keyword(s):  
Seismic Performance ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Flexible Wall ◽  
Eps Composite Soil

scholarly journals Experimental Study on Out-of-Plane Seismic Performance of New Type Masonry System

2021 ◽  
Vol 11 (24) ◽  
pp. 11736
Author(s):  
Ho Choi ◽  
Kang-Seok Lee
Keyword(s):  
Seismic Performance ◽  
Masonry Wall ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Preliminary Calculation ◽  
Four Point Bending ◽  
Out Of Plane ◽  
New Type ◽  
Block Wall ◽  
Joint Mortar

The authors developed two types of block systems, consisting only of main and key blocks, without joint mortar, to improve the in- and out-of-plane seismic performances and enhance the workability. Two types of block systems have different key block shapes. One is the peanuts shape, and the other is the H shape. The proposed block systems have a half-height difference between the main and key blocks, to significantly improve seismic performance in in- and out-of-plane directions, compared to typical masonry wall with joint mortar. In this study, in order to evaluate the out-of-plane seismic performance of the proposed block systems, two types of block walls are experimentally investigated, including the typical block wall. Firstly, the shaking table tests are carried out to investigate the fundamental out-of-plane behaviors of three specimens. Next, four-point bending tests are planned to evaluate the out-of-plane seismic performance, since all specimens do not occur the out-of-plane collapse in the shaking table tests from the preliminary calculation. In this paper, the development of predominant period, profiles of acceleration and displacement, and maximum tensile strength of each specimen are discussed in detail. As a result, the maximum loads of the proposed block walls were about three to four times that of the typical block wall. This result means that the proposed block system has significantly improved seismic performance in the out-of-plane direction.

Seismic performance of helical piles in dry sand from large-scale shaking table tests

Géotechnique ◽  
2019 ◽  
Vol 69 (12) ◽  
pp. 1071-1085 ◽  
Author(s):  
Moustafa Khaled Elsawy ◽  
M. Hesham El Naggar ◽  
Amy Cerato ◽  
Ahmed Elgamal
Keyword(s):  
Seismic Performance ◽  
Large Scale ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Helical Piles ◽  
Dry Sand

AN EXPERIMENTAL STUDY OF IN-PLANE, ARCH-SHAPED FLEXURAL DAMPER

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Yen-Po Wang ◽  
Di-Hung Chen ◽  
Chien-Liang Lee
Keyword(s):  
Experimental Study ◽  
Stress Concentration ◽  
Seismic Performance ◽  
Shaking Table ◽  
Seismic Protection ◽  
Building Structures ◽  
Shaking Table Tests ◽  
Earthquake Intensity ◽  
Component Test ◽  
Portal Frame

An innovative displacement-dependent metallic yielding damper designed to deform inelastically under in-plane flexural bending for seismic protection of building structures is proposed. The in-plane flexural damper that originated from a portal frame is modified by replacing the beam with a circular arch so that the effect of stress concentration can be minimized. Component tests of the in-plane dampers were conducted and compared with analytical results. Hysteresis of the component test indicates a consistent energy-dissipative characteristic of the damper. Moreover, seismic performance of the proposed damper via a series of shaking table tests was carried out. Excellent seismic performance of the proposed in-plane arched damper was observed. The acceleration responses in both peak and root-mean-squares of all floors are significantly reduced, and were greater in extent compared to the earthquake intensity increases.

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