scholarly journals Response Reduction Factor for Mansory Buildings

2020 ◽  
Vol 19 (1) ◽  
pp. 196-203
Author(s):  
Jagat Kumar Shrestha
Keyword(s):  
Pushover Analysis ◽  
Reduction Factor ◽  
Analytical Models ◽  
Elastic Response ◽  
Masonry Building ◽  
Masonry Buildings ◽  
Response Reduction Factor ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

Most of the seismic codes used today incorporate the nonlinear response of a structure by providing an appropriate response reduction factor so that a linear elastic force-based approach can be used in designs. This study focuses on evaluating the response reduction factor for masonry buildings with different mechanical properties, which are used in modern codes to scale down the elastic response of the structure. Using a similar frame-approach, a nonlinear static pushover analysis is carried out on the analytical models of masonry building in finite element analysis software SAP2000v20.0.0. The response reduction factor components, flexibility, and over strength were computed from the results obtained from the nonlinear static pushover analysis. Finally, the response reduction factor is evaluated for different masonry buildings. It is concluded that the R-value given in IS: 1893-2016 for unreinforced masonry is not recommended for random rubble stonemasonry buildings in mud mortar.

scholarly journals Analytical Investigation of Response Reduction Factor (R) for R.C. Elevated Water Tank with Non-linear Static (Pushover) Analysis

2021 ◽  
Author(s):  
Saurabh Kulkarni ◽  
S. S Kadam ◽  
P. B Zambare
Keyword(s):  
Soil Properties ◽  
Pushover Analysis ◽  
Reduction Factor ◽  
Soil Conditions ◽  
Water Tank ◽  
Response Reduction Factor ◽  
Finite Element Software ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

In the present work, an attempt is made to investigate response reduction factor (R) values of different soil types by using nonlinear static (Pushover) analysis for R.C. elevated rectangular water tank structure. All the parameters were investigated by varying properties of soft, medium and hard soils to cover a method of nonlinear static (Pushover) analysis. The zone factor (Z) kept constant Z – III for pandharpur site location and capacity of 150 m3 tank full in condition. This has resulted into SAP 2000 finite element software. The analysis of response reduction factor (R) value was done under three different soil conditions i.e. soft soil properties, medium soil properties, and hard soil properties. Response reduction factor (R) values indicate that R.C. elevated rectangular water tank structure without soil properties behaves quite the one value as per codal provisions.

scholarly journals Nonlinear Static Pushover Analysis of Medium Rise and High-Rise Building

2019 ◽  
pp. 255-561
Author(s):  
M Keshava Murthy ◽  
Ashwini L K
Keyword(s):  
Pushover Analysis ◽  
Performance Level ◽  
Base Shear ◽  
High Rise ◽  
High Rise Building ◽  
Non Linear ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Different Levels ◽  
Nonlinear Static Pushover Analysis

Pushover analysis is an elegant tool to visualise the performance level of a building under a given earthquake. The purpose of the paper is to summarize the Non Linear static Pushover analysis of medium rise RC bare frame and high rise RC infilled structure with soft stories at different levels using ETABS software. Results concluded that due to the introduction of soft stories in the higher level the intensity of hinge formation becomes lower and lower and at the same time displacement and base shear increases

Seismic Performance Assessment of an Existing Road Bridge Using Standard Pushover Analysis

2011 ◽  
Vol 147 ◽  
pp. 278-282
Author(s):  
Teresa A. Roseenid ◽  
N. Premavathi ◽  
Gunasekaran Umarani
Keyword(s):  
Transverse Direction ◽  
Pushover Analysis ◽  
Concrete Bridge ◽  
Target Displacement ◽  
Seismic Performance Assessment ◽  
Lateral Forces ◽  
Inelastic Seismic Response ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

The inelastic seismic response of an existing multi-span concrete bridge is investigated by performing nonlinear static pushover analysis. The bridge is subjected to lateral forces distributed proportionally over the span of the bridge in accordance with the product of mass and mode shape. The bridge is pushed up to the target displacement and the hinge formations of the bridge in different steps of the pushover procedure in the transverse direction are obtained. The expected capacity of the bridge is evaluated and compared with the displacement demand.

scholarly journals Response Reduction Factor for SMRF 3D Frame Buildings on Sloppy Ground

2020 ◽  
Vol 9 (4) ◽  
pp. 2085-2092
Keyword(s):  
Control Method ◽  
Pushover Analysis ◽  
Research Work ◽  
Regular Structure ◽  
Reduction Factor ◽  
Nonlinear Static Analysis ◽  
Analytical Models ◽  
Analysis And Design ◽  
Response Reduction Factor ◽  
Finite Element Software

Lateral forces are key factors in the design of building structure and in general these forces are evaluated using linear static method with the incorporation of response reduction factor. The actual intensity of lateral force is minimized by response reduction factor. However IS Code 1893:2016 does not give information about the components of response reduction factor. The value mentioned in IS code may be based on expert engineering judgment without any scientific basis. The Present research work focus on the estimation of response reduction factor (R) of SMRF frames considering slope terrain without any impairment in slope in Zone V. Fifteen frame models are prepared according to the guideline of IS Code 456:2000 and lateral load on frame was assigned as per IS 1893:2016 (Part-1) for the research purposes. Evaluation of response Reduction Factor according to Applied Technical Council (ATC-19) is carried out which stated that response reduction factor is the product of Strength factor, Redundancy factor and Ductility factor. Pushover analysis also termed as nonlinear static analysis under displacement control method is performed on the analytical models by an integrated finite element software for structural analysis and design called ETABS 2017. P-delta governs the geometrical non-linearity of structure. It has been observed over strength of regular structure is more as compared to irregular geometrical model whereas the ductility reduction factor does not show any significant trend. Moreover, all the models are limited in 6 story only with same structural property additional research is needed considering wider set of parameters framework.

scholarly journals The development of controlled damage mechanisms-based design method for nonlinear static pushover analysis

2014 ◽  
Vol 12 (1) ◽  
pp. 25-40
Author(s):  
Mladen Cosic ◽  
Stanko Brcic
Keyword(s):  
Design Method ◽  
Pushover Analysis ◽  
Damage Mechanism ◽  
Original Method ◽  
Building Damage ◽  
Mechanism Analysis ◽  
Damage Mechanisms ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

This paper presents the original method of controlled building damage mechanisms based on Nonlinear Static Pushover Analysis (NSPA-DMBD). The optimal building damage mechanism is determined based on the solution of the Capacity Design Method (CDM), and the response of the building is considered in incremental situations. The development of damage mechanism of a system in such incremental situations is being controlled on the strain level, examining the relationship of current and limit strains in concrete and reinforcement steel. Since the procedure of the system damage mechanism analysis according to the NSPA-DMBD method is being iteratively implemented and designing checked after the strain reaches the limit, for this analysis a term Iterative-Interactive Design (IID) has been introduced. By selecting, monitoring and controlling the optimal damage mechanism of the system and by developed NSPA-DMBD method, damage mechanism of the building is being controlled and the level of resistance to an early collapse is being increased.

Nonlinear Static Pushover Analysis for Shear Wall Structures in SAP2000 Program

2013 ◽  
Vol 470 ◽  
pp. 1007-1010 ◽  
Author(s):  
Zhi Bin Su ◽  
Tao Han ◽  
Sheng Nan Sun
Keyword(s):  
Reinforced Concrete ◽  
Stress Distribution ◽  
Pushover Analysis ◽  
Shear Wall ◽  
Wall Structures ◽  
Concrete Layer ◽  
Load Pattern ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

To study the nonlinear mechanical characteristics of reinforced concrete shear wall structures under rare earthquakes, a single reinforced concrete shear wall model is established in SAP2000 program, which is simulated by nonlinear multi-layer shell element. Nonlinear static pushover analysis of the model is presented by uniform acceleration lateral load pattern and inverted triangle lateral load pattern. The relationship curve between base shear and top displacement of shear wall, and the stress distribution diagrams of the concrete layer and rebar layer are obtained. It may be concluded that, the yielding of rebar layer and the cracking of the concrete layer may be observed by stress distribution diagrams. SAP2000 program is feasible to nonlinear simulation of shear wall structures.

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