A Study on the Vertical Pull-off Testing and Horizontal Shear Testing Strength of External Wall Tile Adhesion

2020 ◽  
pp. 1001-1010
Author(s):  
Chu-Tsen Liao ◽  
Po-Juin Wu
Keyword(s):  
Wall Tile ◽  
Horizontal Shear ◽  
Shear Testing ◽  
External Wall

A STUDY ON THE DEBONDING OF EXTERNAL WALL TILE FOR HIGH-RISE BUILDINGS IN HONG KONG

2005 ◽  
Author(s):  
S. M. LO ◽  
C. W. HO ◽  
EDWARD C. Y YIU ◽  
D. Q. YANG ◽  
ADA S. K. MAN
Keyword(s):  
Hong Kong ◽  
Wall Tile ◽  
External Wall ◽  
High Rise

THE STUDY OF DEGRADATION CONDITION OF HIGH-RISE BUILDING EXTERIOR WALL

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Chu-Tsen Liao ◽  
Kuang-Jou Chen ◽  
Jen-Chun Hsiao ◽  
Po-Jui Wu ◽  
You-Zhen Fu
Keyword(s):  
Reference Material ◽  
Wall Tile ◽  
City Government ◽  
Inspection System ◽  
Exterior Wall ◽  
External Wall ◽  
Contract Research ◽  
High Rise ◽  
Periodic Inspection ◽  
Seismic Forces

In recent years in Taiwan, some pedestrians were injured by falling external wall tiles. Exterior wall tile fell down for the temperature or other effects of seismic forces, becoming a potential public safety crisis. Office of Building Administration of Taoyuan City Government started inspecting high-rise buildings, which were over eleven stories and constructed before 1995 in Taoyuan city from 2015 to 2016. This study is a contract research. We inspected 298 high-rise buildings’ external wall tiles in Taoyuan City for city government. In this study, we classified the risk of buildings from Level A to E. D and E, which were regarded as the dangerous buildings and in need of repair immediately. D and E accounted for 41.6% percent of total buildings. We also concluded the data in the viewpoints of building age, story, exterior material, direction, and district. The authors hope the conclusion of this study could be submitted as reference material of inspection system, as well as give a significant suggestion to the periodic inspection approach in the future.

scholarly journals Effects of Precast Cladding Systems on Dynamic Characteristics of Steel Frame Buildings by Ambient and Free Vibration Tests

2017 ◽  
Vol 2017 ◽  
pp. 1-20 ◽  
Author(s):  
Jun Ma ◽  
Shinji Nakata ◽  
Akihito Yoshida ◽  
Yukio Tamura
Keyword(s):  
Free Vibration ◽  
Dynamic Characteristics ◽  
Steel Frame ◽  
Ambient Vibration ◽  
Test Cases ◽  
Vibration Method ◽  
External Wall ◽  
Wide Range ◽  
Cladding Panels ◽  
Vibration Tests

Full-scale tests on a one-story steel frame structure with a typical precast cladding system using ambient and free vibration methods are described in detail. The cladding system is primarily composed of ALC (Autoclaved Lightweight Concrete) external wall cladding panels, gypsum plasterboard interior linings, and window glazing systems. Ten test cases including the bare steel frame and the steel frame with addition of different parts of the precast cladding system are prepared for detailed investigations. The amplitude-dependent dynamic characteristics of the test cases including natural frequencies and damping ratios determined from the tests are presented. The effects of the ALC external wall cladding panels, the gypsum plasterboard interior linings, and the window glazing systems on the stiffness and structural damping of the steel frame are discussed in detail. The effect of the precast cladding systems on the amplitude dependency of the dynamic characteristics and the tendencies of the dynamic parameters with respect to the structural response amplitude are investigated over a wide range. Furthermore, results estimated from the ambient vibration method are compared with those from the free vibration tests to evaluate the feasibility of the ambient vibration method.

scholarly journals Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 182
Author(s):  
Zhi-Qi He ◽  
Changxue Ou ◽  
Fei Tian ◽  
Zhao Liu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Fatigue Testing ◽  
Ultimate Capacity ◽  
Horizontal Shear ◽  
Interface Failure ◽  
Interface Shear ◽  
Composite Action ◽  
Shear Connection ◽  
Push Out

This paper develops a new type of shear connection for steel-concrete composite bridges using Ultra-High Performance Concrete (UHPC) as the connection grout. The UHPC-grout strip shear connection is fabricated by preforming a roughened slot in the concrete deck slab, welding an embossed steel rib longitudinally to the upper flange of the steel girder, and casting the strip void between the slot and the steel rib with UHPC grout. The structural performance of the new connection was validated by two sets of experimental tests, including push-out testing of shear connectors and static and fatigue testing of composite beams. The results of push-out testing indicate that the UHPC-grout strip shear connection exhibits a significant improvement of ductility, ultimate capacity, and fatigue performance. The interface shear strength of the UHPC-grout strip connection is beyond 15 MPa, which is about three times that of the strip connection using traditional cementitious grouts. The ultimate capacity of the connection is dominated by the interface failure between the embossed steel and the UHPC grout. The results of composite-beam testing indicate that full composite action is developed between the precast decks and the steel beams, and the composite action remained intact after testing for two million load cycles. Finally, the trail design of a prototype bridge shows that this new connection has the potential to meet the requirements for horizontal shear.

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