Study on the seismic performance of corroded H-shaped steel columns

2019 ◽  
Vol 191 ◽  
pp. 39-61 ◽  
Author(s):  
Shanhua Xu ◽  
Zongxing Zhang ◽  
Guangchong Qin
Keyword(s):  
Seismic Performance ◽  
Steel Columns

Performance of parking steel column damaged by fire

2019 ◽  
Vol 10 (2) ◽  
pp. 138-154
Author(s):  
Farshid Masoumi ◽  
Ebrahim Farajpourbonab
Keyword(s):  
Cyclic Loading ◽  
Seismic Performance ◽  
Numerical Study ◽  
Mechanical Analysis ◽  
Content Type ◽  
Steel Columns ◽  
Fire Engineering ◽  
Steel Column ◽  
Concrete Coating ◽  
Fire Loading

Purpose The primary purpose of this research was to expand the knowledge base regarding the behavior of steel columns during exposure to fire. This paper presents the numerical study of the effect of heat on the performance of parking steel column in a seven-story steel building under cyclic loading. Design/methodology/approach In this research, the forces and deformations developed during a fire are estimated by using detailed 3D finite-element models. The analyses are in the form of a coupled thermo-mechanical analysis in two types of loading: concurrent loading (fire and cyclic loading) and non-concurrent loading (first fire and then cyclically), and the analyses have been conducted in both states of the fire loading with cooling and without cooling using the ABAQUS software. Further, it was investigated whether, during the fire loading, the specimen was protected by a 3-cm-thick concrete coating and how much it changes the seismic performance. After verification of the specimen with the experimental test results, the column model was investigated under different loading conditions. Findings The result of analyses indicates that the effect of thermal damage on the performance of steel columns, when cooling is happening late, is more than the state in which cooling occurs immediately after the fire. In this paper, thermal–seismic performance of parking steel columns has been specified and the effect of the fire damage has been investigated for the protected steel by concrete coating and to the non-protected steel, under both cooling and non-cooling states. Originality/value This study led to recommendations based on the findings and suggestions for additional work to support performance-based fire engineering. It is clear that predicting force and deformation on steel column during fire is complex and it is affected by many variables. Here in this paper, those variables are examined and proper results have been achieved.

scholarly journals Seismic Performance Evaluation of Special RC Frames with Gravity Steel Columns under the Base Level

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Amin Zaherdannak ◽  
Amirhosein Shabani ◽  
Saeed Erfani
Keyword(s):  
Seismic Performance ◽  
Cross Sections ◽  
Rc Columns ◽  
Steel Columns ◽  
Seismic Performance Evaluation ◽  
Performance Factors ◽  
Multistory Buildings ◽  
Base Level ◽  
Rc Frames ◽  
Seismic Force

In many multistory buildings, basement levels are used as parking spaces. However, dimensions of reinforced concrete columns at these levels cause them to be unideal parking spaces. An alternative is to replace the RC columns in middle frames with steel columns that are not a part of seismic force resisting system and only support vertical loads, therefore have smaller sections. Using simply supported steel columns under the base level is beneficial not only because they have smaller cross-sections which lead to increasing the parking space but also these steel columns are easier to be replaced after any possible damages and can be considered as convenient alternatives compared to ordinary RC columns in construction. In this research, seismic performance of structures implementing the suggested alternative is evaluated using nonlinear static and dynamic analyses and compared to that of regular counterparts. Results show that these structures pass the acceptability tests proposed by FEMA P695 methodology. Moreover, seismic performance factors of these two structural systems have been calculated and proposed.

The Seismic Performance Study of Steel Pipe Concrete Column in the Absence of Beam Floor System

2012 ◽  
Vol 446-449 ◽  
pp. 2331-2335
Author(s):  
Li Jie Ma ◽  
Jin Yu Zhang ◽  
Shao Jie Wang
Keyword(s):  
Seismic Performance ◽  
Concrete Columns ◽  
Steel Pipe ◽  
Concrete Column ◽  
Performance Study ◽  
Floor Slab ◽  
Steel Columns ◽  
Column Structure ◽  
Floor System

Architecture is the concrete columns with steel pipe flat floor slab, the 100mm × 100mm of steel pipe concrete column is in the center of the floor. The variation of moment and horizontal anti-force under horizontal displace of steel concrete columns are researched, and the steel columns working are analyzed, from that we can know steel concrete column in the slab-column structure has a good deformability under earthquake.

Seismic Performance of Precast Segmental Bridges: Segment-to-Segment Joints Subjected to High Flexural Moments and Low Shears

PCI Journal ◽  
2003 ◽  
Vol 48 (2) ◽  
pp. 80-96 ◽  
Author(s):  
Sam Megally ◽  
Frieder Frieder Seible ◽  
Robert K. Dowell
Keyword(s):  
Seismic Performance ◽  
Segmental Bridges
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