CUMULATIVE DEFORMATION CAPACITY OF BRACES UNDER VARIOUS CYCLIC LOADING HISTORIES

A new repair technique consisting on a light jacketing with Fibre Reinforced Cementitious Composites (FRCC) for existing reinforced concrete (RC) buildings has been recently proposed to reduce durability problems of RC members and enhance their capacity. In this work, the effects of FRCC jacketing on the flexural capacity of existing RC columns, with and without a pre-damage, has been evaluated of full-scale specimens under cyclic loading. Digital Imagine Correlation (DIC) was also adopted for understanding the strain distribution in the FRCC jacket. The results shown that the FRCC jacket without a proper anchorage slightly enhanced the flexural capacity of the column. The strengthened column experienced a low damage with respect to control column, but occurrence of premature failures did not allow the achievement of high levels of deformation capacity and ductility.

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Deformation Capacity of Steel Shear Panel Damper and its Reflection to AIJ Design Requirements

Journal of Disaster Research ◽

10.20965/jdr.2016.p0125 ◽

2016 ◽

Vol 11 (1) ◽

pp. 125-135 ◽

Cited By ~ 1

Author(s):

Hiroyuki Tamai ◽

◽

Kazuhiko Kasai ◽

Keyword(s):

Fatigue Life ◽

Cyclic Loading ◽

Low Cycle Fatigue ◽

Thickness Ratio ◽

Deformation Capacity ◽

Shear Buckling ◽

Loading Tests ◽

Cyclic Loading Tests ◽

Shear Panel ◽

Shear Panel Damper

Shear panel dampers consisting of stiffeners and panels surrounded by four flanges are used as aseismic hysteretic dampers for buildings in Japan. Cracks can form easily in a shear panel damper when shear buckling occurs during the cyclic loading caused by a severe earthquake.For a relatively thin panel with a large width-to-thickness ratio, the damper’s plastic deformation capacity and the presence of shear buckling can be evaluated from the maximum deformation angle. However, when it is relatively small, very-low-cycle fatigue life for a relatively thick panel must be known to predict the usage limit of the damper, because the failure pattern changes when cracks form in the weld between the panels and flanges. Fatigue life relations for a thick shear panel damper with parameters of normalized width-to-thickness ratio and deformation angle are presented. A method for predicting the fatigue life under severe earthquake conditions is also presented. To validate the prediction expression, cyclic loading tests were performed on a shear panel damper and reviewed. The applicability of the method for predicting the fatigue life was confirmed through non-stationary cyclic loading tests. These results showed the validity and effectiveness of the expressions and the method.

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Seismic and Power Generation Performance of U-Shaped Steel Connected PV-Shear Wall under Lateral Cyclic Loading

International Journal of Photoenergy ◽

10.1155/2014/362638 ◽

2014 ◽

Vol 2014 ◽

pp. 1-15 ◽

Cited By ~ 1

Author(s):

Hongmei Zhang ◽

Jinzhi Dong ◽

Yuanfeng Duan ◽

Xilin Lu ◽

Jinqing Peng

Keyword(s):

Power Generation ◽

Reinforced Concrete ◽

Cyclic Loading ◽

Seismic Behavior ◽

Residential Buildings ◽

Shear Wall ◽

Deformation Capacity ◽

High Rise ◽

Pv Module ◽

New Form

BIPV is now widely used in office and residential buildings, but its seismic performance still remained vague especially when the photovoltaic (PV) modules are installed on high-rise building facades. A new form of reinforced concrete shear wall integrated with photovoltaic module is proposed in this paper, aiming to apply PV module to the facades of high-rise buildings. In this new form, the PV module is integrated with the reinforced concrete wall by U-shaped steel connectors through embedded steel plates. The lateral cyclic loading test is executed to investigate the seismic behavior and the electric and thermal performance with different drift angles. The seismic behavior, including failure pattern, lateral force-top displacement relationship, and deformation capacity, was investigated. The power generation and temperature variation on the back of the PV module and both sides of the shear wall were also tested. Two main results are demonstrated through the experiment: (1) the U-shaped steel connectors provide enough deformation capacity for the compatibility of the PV module to the shear wall during the whole cyclic test; (2) the electricity generation capacity is effective and stable during this seismic simulation test.

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