Seismic response of reinforced concrete frame subassemblages — a Canadian code perspective

1989 ◽  
Vol 16 (5) ◽  
pp. 627-649 ◽  
Author(s):  
Patrick Paultre ◽  
Daniel Castele ◽  
Suzanne Rattray ◽  
Denis Mitchell
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Concrete Structures ◽  
Poor Performance ◽  
Reinforced Concrete Beam ◽  
Test Results ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Slab Width ◽  
Cyclic Loading Tests

The 1984 CSA standard for the design of concrete structures for buildings provided new seismic design and detailing requirements for concrete structures. Full-scale, reversed cyclic loading tests of reinforced concrete beam–slab–column subassemblages were carried out to investigate the seismic performance of frame structures designed with the latest Canadian code. The test results indicate the importance of including the influence of slab reinforcement in computing the beam capacity as well as the need to carefully design the joint regions for shear. The test results indicate the excellent performance of frame components designed with K = 0.7 (R = 4.0) and the poor performance of those designed and detailed with K = 2.0 (R = 1.5). The performance of subassemblages designed with K = 1.3 (R = 2.0) depends on the column to beam strength ratio and on the shear strength of the joints. Models to predict the flexural response as well as the shear response of key elements are described and the role of the spandrel beam in limiting the effective slab width is explained. Key words: seismic design, reinforced concrete, detailing, structures, codes.

The Research of the Realization of Strong Column and Weak Beam Mechanism of Reinforced Concrete Beam Considering the Slab Width

2011 ◽  
Vol 255-260 ◽  
pp. 487-492
Author(s):  
Ying Zhou ◽  
Cui Qiang Zhang ◽  
De Yuan Zhou ◽  
Zhuo Ying Li
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Amplification Factor ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Frame ◽  
Amplification Factors ◽  
Concrete Frame ◽  
Slab Width ◽  
Weak Beam ◽  
Beam Mechanism

This paper gets the column-end moment amplification factors of the concrete frame in the seismic zones of intensity seven and eight, by using the software CANNY and the method of pushover. The results show that when considering the casting slab, the reinforced concrete frame can develop a strong column and weak beam yielding mechanism when the column moment amplification factor adopts 1.4 for seven intensity area and 1.2 for eight intensity zone, preventing the development of collapse.

Deformation Characteristics of Reinforced Concrete Beam-Column Joint Cores under Earthquake Loading

2003 ◽  
Vol 6 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Sayed A. Attaalla ◽  
Mehran Agbabian
Keyword(s):  
Reinforced Concrete ◽  
Shear Deformation ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Frame ◽  
Bond Failure ◽  
Strain Compatibility ◽  
Concrete Frame ◽  
Column Joint ◽  
Reinforced Concrete Frame Structures

The characteristics of the shear deformation inside the beam-column joint core of reinforced concrete frame structures subjected to seismic loading are discussed in this paper. The paper presents the formulation of an analytical model based on experimental observations. The model is intended to predict the expansions of beam-column joint core in the horizontal and vertical directions. The model describes the strain compatibility inside the joint in an average sense. Its predictions are verified utilizing experimental measurements obtained from tests conducted on beam-column connections. The model is found to adequately predict the components of shear deformation in the joint core and satisfactorily estimates the average strains in the joint hoops up to bond failure. The model may be considered as a simple, yet, important step towards analytical understanding of the sophisticated shear mechanism inside the joint and may be implemented in a controlled-deformation design technique of the joint.

Influence and Analysis on the Bearing Capacity of Reinforced-Concrete-Frame Node in Beam and Plate's Constraint

2013 ◽  
Vol 351-352 ◽  
pp. 342-346
Author(s):  
Tai Hua Yang ◽  
Xiao Yu ◽  
Jian Wu Gong ◽  
Bin Tang ◽  
Yang Zhi Zhong ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Reinforced Concrete Beam ◽  
Building Codes ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Short Side ◽  
Concrete Frame ◽  
Shear Bearing Capacity ◽  
Formal Design

According to the domestic and foreign various building codes and a kind of limit fitting formula, to calculate and analyze the compressive bearing capacity of sandwich reinforced concrete beam-column nodes in a high-rising frame structure engineering, and to compare with the results calculated by Midas. They shown those are the facts that cant be neglected, the compressive bearing capacity of the sandwich node core area concrete in beam and plates constraint would improve and the amplitude of improving would be great. But current Chinese building codes haven't included them in the formal design provisions, these ways have to be perfected. In the same time, beam and plate constraint would also have a certain effect to the shear bearing capacity. By contrast, the shear bearing capacity in considering beam and plate constraint would increase 12% to 24%, it would get to 91% of the limit fitting formula calculation value when the short side was sheared, and it is 92% when the long side was sheared. That shown it is quite perfect in considering the effect of the orthogonal beam-plate constraints in domestic seismic code.

Parametric Reliability Analysis of the Seismic Bearing Capacity of Bottom Columns in Reinforced Concrete Frame Structure

2012 ◽  
Vol 204-208 ◽  
pp. 2478-2482
Author(s):  
You Bao Jiang ◽  
Yu Lai Zhao ◽  
Wei Jun Yang ◽  
Zhi Ling Gong
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Seismic Design ◽  
Reliability Index ◽  
Concrete Strength ◽  
Design Parameters ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Parametric Reliability ◽  
Seismic Bearing Capacity

After the Wenchuan earthquake, Chinese Code for Seismic Design of Buildings (GB50011-2010) adjusts some seismic design parameters. Taking into account the randomness of gravity load and earthquake action and the uncertainty of steel strength and concrete strength, this paper analyzes the reliability of seismic bearing capacity of reinforced concrete frame bottom columns. Based on the structural analysis software PKPM, which is in accordance with code for seismic design of buildings, the reliability index of seismic bearing capacity of reinforced concrete frame bottom columns is calculated by the Monte Carlo method with different parameters, such as different seismic intensity, different building storey number, different seismic adjustment coefficient (increment coefficient of frame columns end moment and increment coefficient of design value of combination moment of underlying frame columns lower end section), different horizontal span number, different column location (side column and interior column) and so on. The results indicate that the reliability index can reach 2.0 or above, and can meet the target requirements for all cases which are designed with the current code for seismic design of buildings (GB50011-2010).

scholarly journals PERILAKU LATERAL SIKLIK PORTAL BETON BERTULANG BERISI DINDING BATA MERAH

2018 ◽  
Vol 1 (4) ◽  
pp. 845-856
Author(s):  
Mutia Intan Sari ◽  
Abdullah Abdullah ◽  
Mochammad Afifuddin
Keyword(s):  
Reinforced Concrete ◽  
Brick Masonry ◽  
Experimental Result ◽  
Wall Material ◽  
Base Shear ◽  
Reinforced Concrete Frame ◽  
Infill Wall ◽  
Concrete Frame ◽  
Cyclic Loading Tests ◽  
Masonry Infill Wall

Abstract: Generally, brick masonry is used as infill wall material for houses and buildings. The Infill wall is installed once the structure is constructed, and assumed as the dead load for the structure. In fact, infill wall may contribute significant stiffness to the structure. As a consequent, the structure may develop such higher base shear forces due to the large stiffness of the structure. The purpose of this research is to evaluate the behavior of the reinforced concrete frame specimen with red brick infill wall and the specimen without using any infill wall. The size of the frame specimen is 2350 x 3300 mm, which consists of reinforced concrete bare frame specimen and reinforced concrete frame specimen with brick masonry infill wall. Cyclic loading tests were conducted on the specimens on the top beam of frame by in-plane direction. The displacement loading protocol are performed laterally and determined by the measured maximum of LVDT from the beam-column connection. Based on the experimental result, the increase capacity and the obtained energy dissipation of the infill wall frame specimen is up to 11.65 and 3.54 higher respectively, compared to the bare frame specimen. The decrease of the stiffness and the ductility level of the infill wall specimen is lesser in comparison with the bare frame specimen. The typical failure mechanism of the infill wall specimens is diagonal cracking. Abstrak: Material bahan bangunan pengisi dinding untuk pembangunan rumah tinggal dan gedung umumnya menggunakan bata merah. Dinding pengisi dipasang apabila struktur utama selesai dikerjakan dan dianggap sebagai beban mati. Namun pada kenyataannya struktur bangunan yang memiliki dinding mempunyai kekakuan struktur yang besar. Ditinjau dari aspek kegempaan, struktur bangunan dengan kekakuan yang besar maka semakin besar pula beban gempa yang bekerja. Tujuan dari penelitian ini menganalisis perilaku portal beton bertulang dengan dinding bata merah yang dibandingkan dengan portal beton bertulang tanpa dinding. Pengujian yang dilakukan adalah portal beton bertulang dengan ukuran 2350 × 3300 mm berjumlah 2 sampel yaitu: portal tanpa dinding dan portal berdinding bata merah dengan plasteran. Pengujian portal dilakukan dengan beban lateral siklik dengan arah pembebanan sejajar bidang balok (in plane) pada balok bagian atas portal. Mekanisme pembebanan dilakukan dengan kontrol beban yang ditentukan oleh perpindahan maksimum yang terukur dari LVDT dari join kolom-balok. Hasil penelitian ini menunjukkan terjadinya peningkatan kapasitas dan energi disipasi sebesar 11,65 kali dan 3,54 kali dari portal tanpa dinding. Penurunan kekakuan dan daktilitas yang terjadi lebih kecil dari portal tanpa dinding. Pola kehancuran yang terjadi pada portal berisi dinding bata merah yaitu jenis diagonal cracking

Study on Damage Identification for Reinforced Concrete Structures Based on Wavelet Transform

2011 ◽  
Vol 94-96 ◽  
pp. 1505-1510 ◽  
Author(s):  
Xiao Yu Miao ◽  
She Liang Wang ◽  
Yu Jiang Fan
Keyword(s):  
Wavelet Transform ◽  
Reinforced Concrete ◽  
Damage Identification ◽  
Concrete Structures ◽  
Spatial Location ◽  
Reinforced Concrete Structures ◽  
Test Model ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structures

Reinforced concrete structures are prone to damage during their service lifetime caused by factors such as the effect of overload, ground motions, and other actions. Undetected damage may lead to structural failures. Early detection of damage and timely repairs can prevent catastrophic failure and ensure regular service of structures. As a result, a so-called delimitation wavelet-transform search method, based on the characteristic of multi-resolution of wavelet transform, is presented in this paper for on-line damage identification of reinforced concrete structures. One possible advantage of this method is that the damage temporal and spatial location can be detected rapidly and efficiently. Further research is carried out with numerical simulation of a structure test model to study the storied damage detection and localization of reinforced concrete frame structures under seismic actions. The analyzing result is compared with that observed in a simulated earthquake vibration stand test. Good agreement is obtained and it verifies the effectiveness and validity of the method proposed in this paper.

On earthquake-resistant reinforced concrete frame connections

1994 ◽  
Vol 21 (2) ◽  
pp. 307-328 ◽  
Author(s):  
S. J. Pantazopoulou ◽  
J. F. Bonacci
Keyword(s):  
Reinforced Concrete ◽  
Reinforced Concrete Beam ◽  
Experimental Information ◽  
Physical Problem ◽  
Performance Criteria ◽  
Joint Mechanics ◽  
Reinforced Concrete Frame ◽  
Element Analysis ◽  
Concrete Frame ◽  
Earthquake Resistant

The behavior of earthquake-resistant reinforced concrete frame connections has been researched extensively over the past 30 years, but conflicting interpretations of the underlying physical problem and differences of opinion in defining acceptable performance criteria still pervade almost every aspect of connection behavior and design. This study explores the mechanics of reinforced concrete beam-column joints under lateral loads, with the aim to assess the parametric dependence of the behavior of these elements for the benefit of design. In the course of the study, published experimental information from around the world and results from a number of novel analytical studies are considered collectively in an attempt to broaden the scope and depth of the parametric description of joint mechanics. Apart from improved understanding of the physical problem, the most important outcome of this research is to formulate simple tools for design of earthquake-resisting beam-column connections using a consistent mechanics approach. Key words: beam-column connection, database, earthquake-resistant design, finite element analysis, reinforced concrete, shear strength, stirrups.

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