Seismic design of RC frame structures based on energy-balance method

2021 ◽  
Vol 237 ◽  
pp. 112220
Author(s):  
Cem Yalçın ◽  
Ahmet Anıl Dindar ◽  
Ercan Yüksel ◽  
Hasan Özkaynak ◽  
Oral Büyüköztürk
Keyword(s):  
Energy Balance ◽  
Seismic Design ◽  
Balance Method ◽  
Frame Structures ◽  
Rc Frame ◽  
Energy Balance Method ◽  
Rc Frame Structures

Nonlinear Seismic Analysis of Masonry Infilled RC Frame Structures

2011 ◽  
Vol 117-119 ◽  
pp. 288-294
Author(s):  
Xiao Ying Gong ◽  
Jun Wu Dai
Keyword(s):  
Seismic Design ◽  
Frame Structures ◽  
Lateral Stiffness ◽  
Rc Frame ◽  
Stiffness Ratio ◽  
Infill Wall ◽  
Infill Walls ◽  
Floor Slab ◽  
Rc Frame Structures ◽  
Lateral Stiffness Ratio

Many RC frame structures were severely damaged or collapsed in some layer. The phenomenon was significantly different from the expected failure mode in seismic design code. This paper comprehensively sums up the earthquake characteristics of masonry infilled RC frame structures. Based on an investigation of a masonry infilled RC frame structure damaged in the earthquake area, conduct the research on frail-layer caused by infill walls uneven decorated. On the hypothesis of keeping the main load-bearing component invariant, two models were considered, i. e. frame with floor slab, and frame with both floor slab and infill wall. Furthermore, divide them into groups of the bottom, the middle and the top frail-layer to discuss by changing the arrange of infill wall. Time history analyses using three-dimensional sophisticated finite element method were conducted. The major findings are: 1)infill walls may significantly alter the failure mechanism of the RC frames. 2)controlling the initial interlayers lateral stiffness ratio in a reasonable range is an effective method to avoid frail-layer damage. These findings suggest that the effects of infill wall should be considered in seismic design, keep the initial interlayers lateral stiffness ratio less than the paper suggested, and the structural elasto-plastic analysis model should take slabs and infill walls into account.

Analysis on Progressive Collapse Resistance of Reinforced Concrete Frame Structures

2011 ◽  
Vol 243-249 ◽  
pp. 717-723
Author(s):  
Jin Gang Xiong ◽  
Yon Kang Zheng ◽  
Guan Min Cai ◽  
Yan Li
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Progressive Collapse ◽  
Frame Structures ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Collapse Resistance ◽  
Rc Frame Structures ◽  
Reinforced Concrete Frame Structures

In this paper the analysis is conducted to investigate the progressive collapse resistance of typical reinforced concrete(RC) multi-story frame structures, which are designed according to the China code for seismic design of buildings. The analysis results show that the progressive collapse resistance will be enhanced with the seismic fortification intensity increasing. The progressive collapse resistance of RC frame structures with low seismic fortification intensity are poor. This implies that as for RC frame structures with low seismic or non-seismic demand, close attention must be paid to continuity and ductility in order to prevent progressive collapse.

Direct Damage-Based Seismic Design Method of RC Frame Structures

2014 ◽  
Vol 539 ◽  
pp. 695-699
Author(s):  
Lan Fang Luo ◽  
Jing Xu
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Reduction Factor ◽  
Frame Structures ◽  
Rc Frame ◽  
Strength Reduction Factor ◽  
Direct Damage ◽  
Innovative Methodology ◽  
Rc Frame Structures ◽  
Seismic Design Method

Based on the existing research, this paper presents an innovative methodology to realize direct damage-based seismic design for RC frame structures by mobilizing ESDOF theory and the damage-based strength reduction factor (RDfactor). A design example is then followed to verify this method.

scholarly journals Refined Seismic Design Method for RC Frame Structures to Increase the Collapse Resistant Capacity

2020 ◽  
Vol 10 (22) ◽  
pp. 8230
Author(s):  
Mengmeng Gao ◽  
Shuang Li
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Frame Structure ◽  
Elastic Response ◽  
Frame Structures ◽  
Rc Frame ◽  
Structural Collapse ◽  
Damage State ◽  
Rc Frame Structures ◽  
Seismic Design Method

In current structural design codes, elastic vibration modes are used for seismic design. However, when a structure is subjected to strong earthquakes and inelastic response or even when collapse damage is observed, the damage state is always unevenly distributed along the height of the structure. Such a phenomenon implies the materials of stories with elastic response and slight damage are not fully utilized. In this paper, a new practical and effective method, which improves collapse resistant capacity by making full use of materials, is proposed for reinforcement concrete (RC) frame structures at a structural collapse state. In this method, incremental dynamic analysis (IDA) is used to evaluate the structural collapse capacity. Tangent_ratio (TR) is formulated based on the IDA curves, and the longitudinal reinforcement of columns is modified based on the TR to achieve uniform distribution of damage along the height of building. Fewer variables are optimized and constraints of the provisions in current codes are considered, which makes the proposed procedure more computationally efficient and practical. The proposed method is employed on a 5-story RC frame structure to illustrate its feasibility and practicality. Comparison work indicates that the refined seismic design method can significantly increase the collapse resistant capacity and decrease the maximum inter-story drift ratio response under strong ground motion in a few iterative steps without a cost increase.

Studies on Performance-Based Seismic Design for RC Frame Structures with Energy Dissipation

2012 ◽  
Vol 204-208 ◽  
pp. 2662-2666
Author(s):  
Jie Ying Sui ◽  
Di Tao Niu ◽  
Chen Ming Xu
Keyword(s):  
Energy Dissipation ◽  
Seismic Response ◽  
Seismic Design ◽  
Frame Structures ◽  
Original Structure ◽  
Rc Frame ◽  
Major Earthquake ◽  
Moderate Earthquake ◽  
Performance Based Seismic Design ◽  
Rc Frame Structures

Energy dissipation reduction design can achieve the performance-based seismic design. By contrasting the results of the frame with the SMA dampers and the original structure, the results prove that the SMA damper can reduce the seismic response effectively and achieve the important performance objective “no damage under moderate earthquake and maintainable under major earthquake”.

Cumulative damage effects of mainshock-aftershock sequences on RC-frame structures

2019 ◽  
Vol 32 (3-4) ◽  
pp. 157-169
Author(s):  
Lingxin Zhang ◽  
◽  
Baijie Zhu ◽  
Yunqin Xue ◽  
Jialu Ma ◽  
...  
Keyword(s):  
Cumulative Damage ◽  
Frame Structures ◽  
Rc Frame ◽  
Aftershock Sequences ◽  
Rc Frame Structures
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