scholarly journals STUDY ON TORSIONAL VIBRATION OF HIGH RISE BUILDING IN WIND : Part III・Pressure Fluctuation on Side Face of Square-Section Block

1978 ◽  
Vol 269 (0) ◽  
pp. 93-101
Author(s):  
TAKESHI OHKUMA ◽  
AKIO KANAYA
Keyword(s):  
Torsional Vibration ◽  
Pressure Fluctuation ◽  
High Rise ◽  
High Rise Building ◽  
Side Face

Shake Table Test of Complex High-Rise Building Equipped with Torsional Vibration Control Device

2012 ◽  
Vol 446-449 ◽  
pp. 3889-3893
Author(s):  
Bin Zhao ◽  
Juan He ◽  
Hui Gao ◽  
Xu Gang Chen
Keyword(s):  
Vibration Control ◽  
Torsional Vibration ◽  
Shake Table Test ◽  
Scale Model ◽  
Shake Table ◽  
Test Results ◽  
Torsional Mode ◽  
High Rise ◽  
High Rise Building ◽  
Local Space

For many high-rising buildings, large local space is very useful for its special function needs, such as conference hall and hotel lobby. The shake table test results of a high-rising building with large local space show that the dynamic characteristics of such structure are complex and the torsional mode becomes the first mode, while the torsional responses under earthquake excitation, especially of the floor just above the large local space, are very remarkable. In this paper, the bidirectional Tuned Mass Damper (TMD) is employed for reducing the torsional vibration of such complex high-rise building structure. A reduced-scale model is design and constructed. A series of shake table tests are carried out and the test results indicate that the TMD system is very effective in torsional vibration control of structural system.

Analysis on Seismic Behavior of Irregular High-Rise RC Structure Using Eccentrically Braces

2011 ◽  
Vol 243-249 ◽  
pp. 4001-4004
Author(s):  
Shi Qun Guo
Keyword(s):  
Seismic Response ◽  
Torsional Vibration ◽  
Seismic Behavior ◽  
Seismic Analysis ◽  
Relative Displacement ◽  
Vibration Response ◽  
The Self ◽  
High Rise ◽  
High Rise Building ◽  
Rc Structure

An anti-seismic analysis about two structures (an irregular high-rise building and the previous structure using eccentrically braces) is performed to study their torsional vibration response in earthquake. The self-vibration character and relative displacement between different floors are compared. It is found that adding some eccentrically braces properly can reduce the response of torsional vibration and other seismic response of the structures efficiently. From the example mentioned in the paper, it is verified that this method is a simple and economical one.

Influence of installation of S-shaped pipe offset on the water flow capacity of double stack drainage system in a high-rise building

2019 ◽  
Vol 41 (5) ◽  
pp. 603-622
Author(s):  
Yuxi Guan ◽  
Zheng Fang ◽  
Jianping Yuan ◽  
Zhi Tang
Keyword(s):  
Discharge Capacity ◽  
Pressure Fluctuation ◽  
Flow Direction ◽  
Drainage System ◽  
Drainage Systems ◽  
High Rise ◽  
High Rise Building ◽  
Maximum Discharge ◽  
Drainage Capacity ◽  
Water Seal

In high-rise and ultra-high-rise residential buildings, the drainage systems usually adopt the S-shaped offset pipe joint to avoid collisions of pipelines with beams and columns. However, the flow direction changes at the offset point would significantly affect the drainage capacity of the systems. To better understand the influence of pipe offset joints on the drainage capacity, three different building drainage systems namely YZW 1, YZW 2, and YZW 3 systems, were built up and investigated. YZW 1 system is a standard double-stack drainage system with anti-reflux H-tube joints. YZW 2 and YZW 3 systems were developed from YZW 1 by adding S-shape offset pipe joints on the 4th floor. An extra anti-reflux H-tube joint added 1 m above the offset joint as a measure for improving the drainage capacity differentiates YZW 3 system from YZW 2 system. The pressure fluctuation and water seal losses were adopted as experimental parameters to determine the maximum discharge capacity according to Standard for Capacity Test of Vertical Pipe of the Domestic Residential Drainage System. The experimental results show that the discharge capacity limitation of the drainage system with the offset joint is 6.5 L/s, which is much smaller than 11.0 L/s of the system without the offset joint. In the experiments with the offset joint, the pressure fluctuated fiercely at the position where flow direction changed and caused severe water seal losses of the floor drain and P-shaped trap. An anti-reflux H-tube joint above the original offset joint was observed to relieve the pressure fluctuation as an improvement and the drainage capacity was improved to some extent. The relationships among the maximum discharge rate, pressure fluctuation transients, and water seal losses were discussed. Lastly, a nondimensional analysis was adopted to understand the relationship between water seal losses and pressure limit values under different discharge rates for current test facilities. Practical application: A method has been tested and approved to effectively improve the discharge ability of a building drainage system that includes offset. The application of S-shape-offsets in high-rise building drainage systems can relieve the discharge congestion typically caused by standard pipe offset arrangements.

Partial Collapse During Construction of a High Rise Building Due to Fire

2005 ◽  
Vol 90 (5) ◽  
pp. 42-48
Author(s):  
Predrag L. Popovic ◽  
Richard C. Arnold
Keyword(s):  
High Rise ◽  
High Rise Building
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