scholarly journals ASSESSMENT OF RESPONSE REDUCTION FACTOR FOR ASYMMETRIC RC FRAME BUILDING

2015 ◽  
Vol 2 (06) ◽  
Keyword(s):  
Reduction Factor ◽  
Rc Frame ◽  
Response Reduction Factor ◽  
Frame Building ◽  
Rc Frame Building

scholarly journals Application of DDBD and FBD Methodology for 8-Story RC Frame Using IS 1893 Spectra

10.29007/m72w ◽  
2018 ◽  
Author(s):  
Kunjan D. Gamit ◽  
Jignesh A. Amin
Keyword(s):  
Pushover Analysis ◽  
Reduction Factor ◽  
Rc Frame ◽  
Base Shear ◽  
Response Reduction Factor ◽  
Capacity Curves ◽  
Direct Displacement Based Design ◽  
Effective Period ◽  
Frame Building ◽  
Rc Frame Building

This study investigates the direct displacement based design (DDBD) and convectional force based design (FBD) approach for 8 storey RC frame building in DDBD methodology the displacement profile is calculated and the given MDOF is converted to equivalent single degree of freedom system. After calculating the effective period, secant stiffness, and viscous damping of the equivalent structure, the base shear is obtained, based on which the design and detailing process can be carried out. The designed frames as per DDBD and FBD approach are then analyzed using nonlinear pushover analysis to obtain the capacity curves and response reduction factor. Results of the analysis and comparison of ‘R’ factor indicate the efficiency of the DDBD approach for RC frame buildings

Evaluation of R-Factor for 5 Storey RC Frame (IMRF) Building

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Aditya Kushwah ◽  
Aditya Kushwah ◽  
Aditya Kushwah
Keyword(s):  
Mode Shape ◽  
Fundamental Mode ◽  
Lateral Displacement ◽  
Pushover Analysis ◽  
Reduction Factor ◽  
Rc Frame ◽  
Response Reduction Factor ◽  
R Factor ◽  
Frame Building ◽  
Rc Frame Buildings

According to IS 1893 part 1 (2016), the philosophy of earthquake resistant structures allows for some damages and inelastic lateral displacement in the structure for energy dissipation during an earthquake. The non-linear behaviour of elements in the structure plays a crucial role in earthquake resistance. There are three detailed classes for distinct seismic zones in different national codes. In India, the draught IS 13920 advocated the usage of IMRF (intermediate moment resisting frame) in zones II and III. The 5 story IMRF is designed and detailed as per IS 1893 (part 1) 2016, IS 13920 (2016), IS 1893 draft, IS 13920 draft, IS 456 (2000). In addition, nonlinear static pushover analysis was performed on IMRF and SMRF RC frame buildings in accordance with FEMA 356. (Displacement Coefficient method) During the analysis, two distinct load patterns (i) parabolic as per IS 1893 (part 1) 2016 (ii) fundamental mode shape are utilised, and the influence of p-delta is also taken into account when evaluating the response reduction factor. The analysed R-factor for studied frame building for fundamental mode shape loading was found to be near to the initial estimated R-factor during the design.

scholarly journals Seismic Performance of Multistorey RC Frame Building With The Soft Storey and Masonry Infill

2021 ◽  
pp. 650-656
Author(s):  
Kugan K ◽  
Mr. Nandha Kumar P ◽  
Premalath J
Keyword(s):  
Time History ◽  
Seismic Loading ◽  
Rc Frame ◽  
Base Shear ◽  
Maximum Displacement ◽  
Soft Storey ◽  
Masonry Infills ◽  
Frame Building ◽  
History Analysis ◽  
Rc Frame Building

In this study, four geometrically similar frames having different configurations of masonry infills, has been investigated. In this article attempts are made to explain the factors that impact the soft storey failure in a building are compared with different type of infill. That is Four models like RC bare frame, RC frame with brick mansonry infill, RC frame with brick infill in all the storeys exept the firstsoft storey, RC frame with inverted V bracing in the soft storey. Time history analysis has been carried out for a G+8 multistoried building to study the soft storey effect at different floor levels using E tabs software. The behavior of RC framed building with soft storey under seismic loading has been observed in terms of maximum displacement ,maximum storey drift, base shear and storey stiffness as considered structure.

scholarly journals Effect of uniform temperature load on design of long reinforced concrete structures without expansion joints

2021 ◽  
Vol 15 (3) ◽  
pp. 68-80
Author(s):  
Pham Thai Hoan ◽  
Nguyen Minh Tuan
Keyword(s):  
Rc Frame ◽  
Uniform Temperature ◽  
Expansion Joints ◽  
Rc Structures ◽  
Frame Building ◽  
Medium Length ◽  
Building Models ◽  
Temperature Load ◽  
Internal Forces ◽  
Rc Frame Building

This study presents an investigation on the design of long reinforced concrete (RC) structures subjected to uniform temperature load by considering three RC frame building models with different lengths of 45 m, 135 m, and 270 m using Etabs. The uniform temperature load is considered being the change from the annual average highest to lowest air temperature at the construction site in the case of unavailable temperature data of concrete. The analysis results indicate that the uniform temperature load mainly influences on the internal forces of RC members at storey 1 and slightly effects on the internal forces of RC members at storey 2. For short-length RC structures, the effect of temperature load can be ignored in the design of RC elements, whereas it must be taken into account in design of slab, beams and some column positions at storey 1 of medium-length and long RC structures without expansion joints. For the present RC frame building models, the required slab reinforcement in long direction increases about 33.4% for medium-length RC structures (135 m) and about 48.2% for long RC structures (270 m) without expansion joints. The required reinforcement for positive moment at mid-span increases from 33.7 to 39.4%, whereas the total required reinforcement for negative moment at the supports of beams increases from 19.4 to 34.9% in long direction of 270 m long RC structures without expansion joints due to uniform temperature load. Column design of long RC structures without expansion joints under uniform temperature load must be concerned, especially for columns in the corners.

scholarly journals Compliance-Based Estimation of Seismic Collapse Risk of an Existing Reinforced Concrete Frame Building

2021 ◽  
Author(s):  
Anastasios Tsiavos ◽  
Pascal Amrein ◽  
Nathan Bender ◽  
Bozidar Stojadinovic
Keyword(s):  
Earthquake Ground Motion ◽  
Rc Frame ◽  
Seismic Code ◽  
Existing Structures ◽  
Frame Building ◽  
Seismic Collapse ◽  
Rc Building ◽  
Hazard Level ◽  
Rc Frame Building ◽  
Code Compliance

Abstract The seismic evaluation of existing structures is based on the determination of the damage likely to occur during the lifetime of these structures due to earthquake ground motion excitation. However, there is not a consensus about the acceptable level of seismic damage, the expected lifetime of these structures, and the seismic hazard level(s) to evaluate the structures at. This paper presents a methodology for the parametric determination of the seismic collapse risk of an existing Reinforced Concrete (RC) frame building based on its seismic code compliance, quantified by a dimensionless metric. This metric, defined as compliance factor, compares the seismic capacity of an existing structure with the seismic demand for a new structure at a predetermined hazard level. The inelastic seismic behavior of four models of the RC frame building of varying compliance was analytically investigated in this study to demonstrate the implementation of the novel methodology. The four models of the RC building were chosen to represent existing RC frame structures, designed and constructed before the introduction of the modern seismic code provisions. These four building models were excited by a group of earthquake ground motion excitations using Incremental Dynamic Analysis (IDA). The collapse probability of the four models of the RC building representing varying values of seismic code compliance was determined for two different locations corresponding to regions of moderate and high seismic hazard, thus laying the basis for the compliance-based estimation of the seismic collapse risk of existing structures.

Seismic response of a non-ductile RC frame building subjected to shake-table excitations

2021 ◽  
Author(s):  
Patricio Quintana Gallo ◽  
Umut Akguzel ◽  
Athol J. Carr ◽  
Stefano Pampanin
Keyword(s):  
Seismic Response ◽  
Shake Table ◽  
Rc Frame ◽  
Frame Building ◽  
Rc Frame Building
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