scholarly journals RESTORING FORCE CHARACTERISTICS OF ULTRA-HIGH-STRENGTH SHEAR WALLS

2010 ◽  
Vol 75 (648) ◽  
pp. 395-403
Author(s):  
Hitoshi KUMAGAI ◽  
Shizuo HAYASHI
Keyword(s):  
Shear Walls ◽  
High Strength ◽  
Restoring Force ◽  
Force Characteristics

scholarly journals RESTORING FORCE CHARACTERISTICS MODEL OF CES SHEAR WALLS

2013 ◽  
Vol 78 (693) ◽  
pp. 2027-2034 ◽  
Author(s):  
Suguru SUZUKI ◽  
Hiroshi KURAMOTO ◽  
Tomoya MATSUI
Keyword(s):  
Shear Walls ◽  
Restoring Force ◽  
Force Characteristics

scholarly journals RESTORING FORCE CHARACTERISTICS OF BRACES MADE OF HIGH STRENGTH STEEL WITH LOW YIELD RATIO

1992 ◽  
Vol 437 (0) ◽  
pp. 105-113
Author(s):  
Masayoshi NAKASHIMA ◽  
Bunzo TSUJI ◽  
Takayoshi NISHINO ◽  
Tomoki ASHIZAWA
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Yield Ratio ◽  
Restoring Force ◽  
Force Characteristics

scholarly journals Experiments on Hybrid Precast Concrete Shear Walls Emulating Monolithic Construction with Different Amounts of Posttensioned Strands and Different Debond Lengths of Grouted Reinforcements

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Zhangfeng Zhu ◽  
Zhengxing Guo
Keyword(s):  
Energy Dissipation ◽  
Brittle Failure ◽  
Precast Concrete ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Restoring Force ◽  
Lateral Resistance ◽  
Wall Specimen ◽  
Variable Condition

This paper proposed a hybrid precast concrete shear wall emulating monolithic construction (HPWEM) that utilized grouted vertical connecting reinforcements and unbonded posttensioned high-strength strands across the horizontal joint for the lateral resistance. The grouted reinforcements with predetermined debond length were used to provide strength by tension and energy dissipation by yielding. The posttensioned strands were mainly employed to offer the restoring force to reduce the residual displacement by elastic extension. The overlapping welded closed stirrups improved the confinement property of the restrained concrete, avoiding the brittle failure. Six HPWEM specimens, considering variables including the amounts of strands and the debond lengths of grouted reinforcements, as well as one referenced cast-in-place monolithic wall specimen, were tested under the low-cycle reversed lateral load. The HPWEM specimens were capable of providing strength, stiffness, ductility, and energy dissipation equivalent to that of the monolithic wall specimen under certain variable condition.

scholarly journals Effects of hoop reinforcement in
 steel and reinforced concrete composite sections

1984 ◽  
Vol 17 (3) ◽  
pp. 198-214
Author(s):  
T. Suzuki ◽  
K. Takiguchi ◽  
T. Ichinose ◽  
T. Okamoto
Keyword(s):  
Reinforced Concrete ◽  
Large Deformation ◽  
High Strength Steel ◽  
Local Buckling ◽  
High Strength ◽  
Deformation Capacity ◽  
Longitudinal Reinforcement ◽  
Structural System ◽  
Restoring Force ◽  
Force Characteristics

A new version of steel and reinforced concrete (SRC) structural system is proposed. It consists of H-shaped high strength steel, concrete and hoop reinforcement. Longitudinal reinforcement is not used. Experiments were carried out to study the restoring force characteristics of the proposed SRC, with emphasis on the effects of hoop reinforcement. Hoop reinforcement improved the compressive behaviour of the concrete and protected the H-shaped steel from local buckling. The proposed SRC system showed a large energy dissipating capacity as well as a large deformation capacity.

Seismic performance of precast shear walls prestressed via post-tensioned high strength bars placed inside grouted corrugated pipes

2021 ◽  
Vol 237 ◽  
pp. 112153
Author(s):  
Qing Zhi ◽  
Liqun Kang ◽  
Lu Jia ◽  
Jingang Xiong ◽  
Zhengxing Guo
Keyword(s):  
Seismic Performance ◽  
Shear Walls ◽  
High Strength ◽  
Post Tensioned

Hysteretic model of shear walls built with high‐strength reinforcement

2021 ◽  
Author(s):  
Xiangyong Ni ◽  
Shuangyin Cao ◽  
Yonghui Hou
Keyword(s):  
Shear Walls ◽  
High Strength ◽  
Hysteretic Model

scholarly journals Seismic Strengthening Effects of Full-Size Reinforced Concrete Frame Retrofitted with Novel Concrete-Filled Tube Modular Frame by Pseudo-Dynamic Testing

2021 ◽  
Vol 11 (11) ◽  
pp. 4898
Author(s):  
Jin-Seon Kim ◽  
Ju-Seong Jung ◽  
Dong-Keun Jung ◽  
Eui-Yong Kim ◽  
Kang-Seok Lee
Keyword(s):  
Dynamic Analysis ◽  
Shear Failure ◽  
Dynamic Testing ◽  
Seismic Intensity ◽  
Seismic Retrofitting ◽  
Restoring Force ◽  
Rc Structures ◽  
Linear Dynamic ◽  
Non Linear ◽  
Force Characteristics

The present study proposes a new seismic retrofitting method using a concrete-filled tube modular frame (CFT-MF) system, a novel technique to overcome and improve the limitations of existing seismic strengthening methods. This CFT-MF seismic retrofitting method makes the most of the advantages of both concrete and steel pipes, thereby significantly improving constructability and increasing integration between the existing structure and the reinforcement joints. This method falls into the category of typical seismic retrofitting methods that focus on increasing strength, in which the required amount of seismic reinforcement can be easily estimated. Therefore, the method provides an easy solution to improving the strength of existing reinforced concrete (RC) structures with non-seismic details that are prone to shear failure. In the present study, a full-size two-story test frame modeled from existing domestic RC structures with non-seismic details was subjected to pseudo-dynamic testing. As a result, the effect of the CFT-MF system, when applied to existing RC structures, was examined and verified, especially as to its seismic retrofitting performance, i.e., restoring force characteristics, stiffness reinforcement, and seismic response control. In addition, based on the pseudo-dynamic testing results, a restoring force characteristics model was proposed to implement non-linear dynamic analysis of a structure retrofitted with the CFT-MF system (i.e., the test frame). Finally, based on the proposed restoring force characteristics, non-linear dynamic analysis was conducted, and the results were compared with those obtained by the pseudo-dynamic tests. The results showed that the RC frame (building) with no retrofitting measures applied underwent shear failure at a seismic intensity of 200 cm/s2, the threshold applied in seismic design in Korea. In contrast, in the frame (building) retrofitted with the CFT-MF system, only minor earthquake damage was observed, and even when the maximum seismic intensity (300 cm/s2) that may occur in Korean was applied, small-scale damage was observed. These results confirmed the validity of the seismic retrofitting method based on the CFT-MF system developed in the present study. The non-linear dynamic analysis and the pseudo-dynamic test showed similar results, with an average deviation of 10% or less in seismic response load and displacement.

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