Seismic Performance of Stairs as Isolated and Built-in RC Frame Building

2014 ◽  
pp. 1001-1014 ◽  
Author(s):  
Zaid Mohammad ◽  
S. M. Talha ◽  
Abdul Baqi
Keyword(s):  
Seismic Performance ◽  
Rc Frame ◽  
Frame Building ◽  
Rc Frame Building

Effect of staircase on seismic performance of RC frame building

2015 ◽  
Vol 9 (2) ◽  
pp. 375-390 ◽  
Author(s):  
Onkar G. Kumbhar ◽  
Ratnesh Kumar ◽  
Shrabony Adhikary
Keyword(s):  
Seismic Performance ◽  
Rc Frame ◽  
Frame Building ◽  
Rc Frame Building

scholarly journals Seismic performance evaluation and risk assessment of typical reinforced concrete frame buildings with masonry infill and conventional vertical extension in Nepal

2021 ◽  
Author(s):  
Sujan Pradhan ◽  
Yuebing Li ◽  
Yasushi Sanada
Keyword(s):  
Seismic Performance ◽  
Brick Masonry ◽  
Rc Frame ◽  
Infill Walls ◽  
Masonry Infill ◽  
Frame Building ◽  
Vertical Extension ◽  
Frame Buildings ◽  
Rc Frame Building ◽  
Rc Frame Buildings

AbstractMany reinforced concrete (RC) frame buildings in Nepal were significantly damaged by the 7.8 magnitude (Mw) earthquake in Nepal on April 25, 2015. To contribute to mitigate future earthquake disasters, the current study focuses on two specific characteristics of residential RC frame buildings in the capital city of Nepal, Kathmandu: the application of brick masonry infill to exterior and partition walls, and the conventional vertical extension of building stories different from the design. Although these factors are likely to significantly affect the seismic performance, their effects are frequently neglected in practical design and construction management in developing countries. Hence, the main objective of this research is to investigate and clarify the seismic performance of RC frame buildings considering the above factors through experimental and numerical investigations. The present paper (1) briefly introduces the characteristics of a typical residential RC frame building in Kathmandu, (2) illustrates the numerical modeling parametrically considering three different contributions of brick masonry infill walls and (3) investigates the seismic performance of the RC frame building considering the effects of the infill wall modeling and the vertical extension through numerical analyses. Consequently, it was found that the consideration of the in-plane stiffness and strength of the infill walls resulted in both positive and negative contributions to the seismic performance of low-rise (up to three stories) and medium-rise (more than three stories) buildings respectively, quantitatively clarifying significant effects of the presence of infill and the vertical extension. These findings contribute to provide realistic solutions to upgrade the seismic performance by utilizing or removing the brick masonry infill walls or by managing the building stories to mitigate future earthquake disasters on typical RC frame buildings not only in Nepal but also in other countries with similar backgrounds.

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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