Effect of flexural reinforcement type and ratio on the punching behavior of RC slab-column edge connections subjected to reversed-cyclic lateral loads

2019 ◽  
Vol 200 ◽  
pp. 109703 ◽  
Author(s):  
Mohammed El-Gendy ◽  
Ehab El-Salakawy
Keyword(s):  
Lateral Loads ◽  
Rc Slab ◽  
Flexural Reinforcement ◽  
Reversed Cyclic

The Effects of Shear Reinforcement on the Reversed Cyclic Loading Behavior of Flat Plate Structures

1975 ◽  
Vol 2 (4) ◽  
pp. 572-582 ◽  
Author(s):  
Neil M. Hawkins ◽  
Denis Mitchell ◽  
Samir N. Hanna
Keyword(s):  
Energy Dissipation ◽  
Flat Plate ◽  
Lateral Loads ◽  
Plate Structures ◽  
Maximum Capacity ◽  
Absorption Energy ◽  
Flexural Reinforcement ◽  
Stiffness Characteristics ◽  
The University ◽  
Reversed Cyclic

This paper reports one phase of a research program at the University of Washington on the seismic response of flat plate to column connections. In particular the behavior of connections containing integral beam stirrup reinforcement in the slabs is discussed. The paper compares different approaches for designing that stirrup reinforcement, outlines the benefits of placing stirrup reinforcement in the slab, and gives guidelines as to the design and proper detailing necessary for that stirrup reinforcement. The effects of concentration of the flexural reinforcement in the immediate column region are also examined. Ductility ratios, energy absorption, energy dissipation, and degeneration of stiffness characteristics of the specimens are reported together with the lateral loads for first yielding and maximum capacity of the specimens.

In-plane response of unreinforced masonry walls confined by reinforced concrete tie-columns and tie-beams

2017 ◽  
Vol 20 (11) ◽  
pp. 1632-1643 ◽  
Author(s):  
Masoud Amouzadeh Tabrizi ◽  
Masoud Soltani
Keyword(s):  
Numerical Study ◽  
Nonlinear Behavior ◽  
Numerical Approach ◽  
Masonry Wall ◽  
Masonry Walls ◽  
Lateral Loads ◽  
Confined Masonry ◽  
Smeared Crack ◽  
Modeling Strategy ◽  
Reversed Cyclic

This article focuses on the experimental and analytical investigations of masonry walls surrounded by tie-elements under in-plane loads. The experimental results of an unconfined and a confined masonry wall, tested under reversed cyclic lateral loads, are presented. For numerical study, a micro-modeling strategy, using smeared-crack-based approach, is adopted. In order to validate the numerical approach, experimental test results and data obtained from the literature are used, and through a systematic parametric study, the influence of adjoining walls and number of tie-columns on the seismic behavior of confined masonry panels is numerically assessed and a simple but rational method for predicting the nonlinear behavior of these structures is proposed.

Comparison of Seismic Behaviors of Interior Joints in PT and RC Flat Plate Systems

2007 ◽  
Vol 348-349 ◽  
pp. 741-745
Author(s):  
Young Mi Park ◽  
Sang Whan Han ◽  
Jong Hyuk Ryu
Keyword(s):  
Flat Plate ◽  
Seismic Performance ◽  
Shear Walls ◽  
Actual Behavior ◽  
Lateral Loads ◽  
Moment Frames ◽  
Gravity Load ◽  
Load Carrying ◽  
Rc Slab ◽  
Seismic Behaviors

The purpose of this study is to compare the seismic behaviors of interior post-tensioned (PT) and reinforced concrete (RC) flat plate slab-column connections designed to resist only gravity loads. In general, flat plate systems have been used to support gravity loads, which should be constructed with lateral system such as shear walls or moment frames. Flat plate systems should retain the ability to undergo the lateral drift associated with the lateral system without loss of gravity load carrying capacity. Although these systems are common, relatively little experimental study has been conducted to assess actual behavior under lateral loads. Therefore, this study was undertaken to assess the seismic performance of two PT and one RC slab-column interior connection under high gravity loads. This study observed that PT connections had a better seismic performance than corresponding RC connections in terms strength, deformability, energy absorption.

DESIGN AND PERFORMANCE OF HIGH-RISE STRUCTURE USING ULTRA-LIGHTWEIGHT CROSS LAMINATED TIMBER FLOOR SYSTEM

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Danish Ahmed ◽  
Tahar Ayadat ◽  
Andi Asiz
Keyword(s):  
Concrete Slab ◽  
Performance Criteria ◽  
Structural Performance ◽  
Lateral Loads ◽  
Reinforced Concrete Slab ◽  
Existing Building ◽  
Cross Laminated Timber ◽  
High Rise ◽  
Rc Slab ◽  
Floor System

The main objective of this paper is to study the structural performance of a high-rise structure when alternative lightweight material known as cross-laminated timber was used as a slab in floor system in lieu of conventional reinforced concrete slab. A numerical case study was conducted using a highly irregular RC frame building with its two 60-story towers joined at the top. Three major analyses were considered. First, modeling and analyzing the building with an RC slab was conducted to determine the design reference. Second, substituting the RC slab with the CLT slab was performed using the same building skeleton. Third, redesigning and optimizing the building skeleton with that CLT to observe skeleton material saving obtained using the same structural performance criteria. Major lateral loads applicable in the Eastern Province of Saudi Arabia were inputted. Strengths and serviceability requirements for floor diaphragm and lateral load resisting system were checked first before performing a comparative analysis between traditional RC and CLT slabs as floor diaphragm. The structural performance criteria to be used for comparative study between RC and CLT slabs included total drift, inter-story drift due to lateral loads, and base reactions. Structural periods and acceleration responses for each floor were investigated and contrasted with the existing building code. The foundation demand was also investigated based on the structural weight and reactions generated from the RC and CLT floor systems.

Seismic Design and Testing of an RC Slab-Column Frame Strengthened by Steel Bracing

1996 ◽  
Vol 12 (4) ◽  
pp. 645-666 ◽  
Author(s):  
Adnan C. Masri ◽  
Subhash C. Goel
Keyword(s):  
Rational Design ◽  
Design Procedure ◽  
Rc Frame ◽  
Building Structures ◽  
Lateral Loads ◽  
Steel Bracing ◽  
Rc Slab ◽  
Ductile Steel ◽  
Bracing System ◽  
Design And Testing

This study is concerned with developing a rational design procedure for use of ductile steel bracing for strengthening existing seismically “weak” RC slab-column building structures. A one-third scale, two-bay, two-story RC slab-column frame model was selected to represent existing seismically inadequate structures of its type. The design procedure, construction and test results of the steel bracing system for strengthening the RC frame are presented in this paper. The strengthened frame was subjected to a combination of gravity and cyclic lateral loads up to 2% overall frame drifts. The behavior of the strengthened frame improved dramatically over that of the bare RC frame. A maximum 2.75% drift in the first story was reached which is highly probable during severe earthquake motions.

Behavior of HPFRC Connections for Precast Concrete Frames Under Reversed Cyclic Loading

PCI Journal ◽  
1998 ◽  
Vol 43 (6) ◽  
pp. 58-71 ◽  
Author(s):  
Rosa M. Vasconez ◽  
Antoine E. Naaman ◽  
James K. Wight
Keyword(s):  
Cyclic Loading ◽  
Precast Concrete ◽  
Concrete Frames ◽  
Reversed Cyclic Loading ◽  
Reversed Cyclic

Hysteretic behavior of traditional Chinese timber frames under cyclic lateral loads

2018 ◽  
Vol 60 (4) ◽  
pp. 378-386
Author(s):  
Qingfang Niu ◽  
Jia Wan ◽  
Tieying Li ◽  
Y. Frank Chen
Keyword(s):  
Hysteretic Behavior ◽  
Lateral Loads
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