Seismic performance of precast concrete columns with prefabricated UHPC jackets in plastic hinge zone

2021 ◽  
Vol 245 ◽  
pp. 112776
Author(s):  
Dongzhi Guan ◽  
Zixuan Chen ◽  
Jiabin Liu ◽  
Zhiyi Lin ◽  
Zhengxing Guo
Keyword(s):  
Seismic Performance ◽  
Precast Concrete ◽  
Plastic Hinge ◽  
Concrete Columns ◽  
Hinge Zone

scholarly journals Experimental Study on Seismic Behavior of Precast Frame Columns with Vertical Reinforcement Spliced with Grouted Sleeve Lapping Connectors

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Qiong Yu ◽  
Liang Zhang ◽  
Shaohua Bai ◽  
Baoxiu Fan ◽  
Zhenhai Chen ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Failure Modes ◽  
Precast Concrete ◽  
Hysteresis Loops ◽  
Concrete Columns ◽  
Type I ◽  
Type Ii ◽  
Force Transfer ◽  
Steel Sleeve

Grouted splice connector is widely employed in precast concrete structures, but its utilization is still limited by shortcomings such as high construction cost, inconvenience in assemblage, and uncompacted grout caused by its small sleeve diameter. The grouted sleeve lapping connectors proposed by the authors can not only provide reasonable force transfer and convenient construction processing but also have the characteristics of low price and easy grouting. In this paper, the seismic performance of two full-scale precast concrete columns with two types of grouted sleeve lapping connectors was investigated, where type-I connector connected two lapped rebars and type-II connector connected four lapped rebars by a steel sleeve, respectively. A cast-in-situ column was also tested as a reference. All the specimens were tested under reversed cyclic horizontal load with a constant axial force. The distribution of cracks, failure modes, loading capacities, deformation abilities, stiffness, ductility, hysteresis loops, and energy dissipation of the specimens were studied. The type-I and type-II grouted sleeve lapping connectors satisfactorily transferred the stress of rebars when the columns reached their ultimate loads, and the seismic performance of the precast concrete columns was found to be comparable to that of the cast-in-situ column. Thus, the grouted sleeve lapping connector has a potential to replace the grouted splice connector in cast-in-situ connection.

Seismic performance of a bridge pier reinforced with titanium alloy bars

2021 ◽  
Author(s):  
Mahesh Acharya ◽  
Mustafa Mashal ◽  
Jared Cantrell
Keyword(s):  
Titanium Alloy ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Large Scale ◽  
Plastic Hinge ◽  
Bridge Pier ◽  
Bridge Piers ◽  
Structural Performance ◽  
Concrete Bridge ◽  
Hinge Zone

<p>The research in this paper focuses on the use of Titanium Alloy Bars (TiABs) in concrete bridge piers located in high seismic zones. The paper discusses a new bridge pier system that incorporates both seismic resiliency and durability concepts. A large-scale bridge pier, reinforced with TiABs and spiral, is tested under quasi-static cyclic loading protocol. The results are compared against a benchmark cast-in-place pier with normal rebars and spiral under the same loading protocol. Based on the testing results, the use of TiABs in concrete piers would reduce rebar congestion up to 50%, provide adequate ductility, and would result in reduced residual displacement following an earthquake. The pier reinforced with TiABs reached higher drift ratios compared to cast-in-place pier. Furthermore, smaller flexural cracks that are likely to appear in the plastic hinge zone during moderate earthquakes are not a major concern for structural performance and durability of bridge piers reinforced with TiABs.</p>

scholarly journals Behaviour of ductile hollow reinforced concrete columns

1983 ◽  
Vol 16 (4) ◽  
pp. 273-290 ◽  
Author(s):  
J. B. Mander ◽  
M. J. N. Priestley ◽  
R. Park
Keyword(s):  
Reinforced Concrete ◽  
Axial Load ◽  
Plastic Hinge ◽  
Concrete Columns ◽  
Bridge Piers ◽  
Reinforced Concrete Bridge ◽  
Hinge Zone ◽  
Lateral Displacements ◽  
Transverse Steel ◽  
Constant Axial Load

An experimental investigation into the seismic performance of ductile hollow reinforced concrete bridge piers is described. Four 3.2 m high specimens, 750 mm square with 120 mm thick walls containing 60 longitudinal steel bars and different arrangements of confining steel in the plastic hinge zone were subjected to a constant axial load and cyclic lateral displacements. An assessment of the effect of axial load and the amount of transverse steel on the rotational capacity of the plastic hinge is made. The specimens performed satisfactorily at member ductilities between 6 and 8 without 
any significant degradation of strength under cyclic loading.

scholarly journals METODE EKSPERIMENTAL PERKUATAN KOLOM BETON BERTULANG MENGGUNAKAN FRP

2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Karmila Achmad ◽  
Agoes SMD ◽  
Tavio .
Keyword(s):  
Experimental Method ◽  
Plastic Hinge ◽  
Concrete Columns ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Displacement Ductility ◽  
Reinforced Polymer ◽  
Hinge Zone ◽  
Strength And Ductility ◽  
Important Structure

METODE EKSPERIMENTAL PERKUATAN KOLOM BETON BERTULANG MENGGUNAKAN FRP Experimental Method Of Strengthening Concrete Columns Using FRPKarmila Achmad1, Agoes SMD2, Tavio31Jurusan Teknik Sipil Fakultas Teknik – Politeknik Negeri Balikpapan2Jurusan Teknik Sipil Fakultas Teknik – Universitas Brawijaya Malang3Jurusan Teknik Sipil Fakultas Teknik – Institut Sepulun Nopember SurabayaAlamat korespondensi: Jl Soekarno Hatta Km. 08, Balikpapane-mail: 1)[email protected] column is an important structure element because the failure of column will have direct impact to other structure components, so that the ruin of structural column is an important thing to be observed.  The research use experimental method. The aim of this research is to get improving of strength and ductility in column specimen which is given the FRP strengthener (Fiber Reinforced Polymer) compared with original column. There are 3 specimens used. They are C-1 (original column), C-1G (column with GFRP strengthener 1 layer) and C-1C (column with CFRP strengthener 1 layer). From the research got the increasing Pmax toward original column is 33,52% and 54,97%, the increasing of dmax is 6,65% and 81,18%, also the increasing of Mmax is 32,41% and 55,36% each for C-1G and C-1C. Ductility indexes taken on three positions are plastic hinge zone, a half high of column effective and as high as column effective. From analyze result got the increasing of displacement ductility toward C-1 for C-1G is -34,20%, -28,46% and -12,74% and C-1C is 64,48%, 108,74% and 118,68%, each for plastic hinge zone, a half high of column effective and as high as column effective. In column C-1G happened the decreasing of ductility value because there has been destruction in column head when the test was running. Key words : Experimental method, FRP, RC, Strengthener columnAbstrakKolom merupakan elemen struktur penting karena kegagalan kolom akan berpengaruh langsung terhadap komponen struktur lainnya , sehingga kehancuran kolom struktural merupakan hal yang penting untuk dicermati . Penelitian ini menggunakan metode eksperimen . Tujuan dari penelitian ini adalah untuk mendapatkan meningkatkan kekuatan dan daktilitas dalam spesimen kolom yang diberi FRP penguat ( Fiber Reinforced Polymer ) dibandingkan dengan kolom awal . Ada 3 spesimen yang digunakan . Mereka adalah C - 1 ( kolom asli) , C - 1G ( kolom dengan GFRP penguat 1 lapisan ) dan C - 1C ( kolom dengan CFRP penguat 1 lapisan ) . Dari penelitian mendapat peningkatan Pmax menuju kolom awal adalah 33,52 % dan 54,97 % , peningkatan dmax adalah 6,65 % dan 81,18 % , juga meningkatnya Mmax adalah 32,41 % dan 55 , 36 % masing-masing untuk C - 1G dan C - 1C . Indeks daktilitas diambil pada tiga posisi yang zona sendi plastis , setengah tinggi kolom yang efektif dan setinggi kolom yang efektif . Dari hasil analisis mendapat peningkatan daktilitas terhadap - C 1 untuk C - 1G adalah -34,20 % , -28,46 % dan -12,74 % dan C - 1C adalah 64,48 % , 108,74 % dan 118,68 % , masing-masing untuk zona sendi plastis , setengah tinggi kolom yang efektif dan setinggi kolom yang efektif . Dalam kolom C - 1G terjadi penurunan nilai daktilitas karena sudah ada kerusakan di kepala kolom saat tes berjalan .Kata kunci : metode eksperimental , FRP , RC , kolom Strengthener

scholarly journals Studies on Seismic Performance of Precast Concrete Columns with Grouted Splice Sleeve

2017 ◽  
Vol 7 (6) ◽  
pp. 571 ◽  
Author(s):  
Zheng Lu ◽  
Zixin Wang ◽  
Jianbao Li ◽  
Biao Huang
Keyword(s):  
Seismic Performance ◽  
Precast Concrete ◽  
Concrete Columns
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