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JGJ/T 487-2020: Technical standard for control of building vibration with wind load
JGJ/T 487-2020
UDC
JGJ
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
P JGJ/T 487-2020
Record No.: J2848-2020
Technical Standard for Control of Building Vibration with
Wind Load
ISSUED ON: JUNE 29, 2020
IMPLEMENTED ON: NOVEMBER 01, 2020
Issued by: Ministry of Housing and Urban-Rural Development of the People’s
Republic of China
Table of Contents
1 General Provisions ... 7
2 Terms and Symbols ... 8
2.1 Terms ... 8
2.2 Symbols ... 10
3 Basic Requirements ... 12
3.1 General requirements ... 12
3.2 Calculation of controlled structural responses subject to wind load ... 13
3.3 Design requirements of the wind-induced structural vibration control system ... 17
3.4 Testing of the wind-induced structural vibration control system ... 18
4 Wind Load ... 19
4.1 General requirements ... 19
4.2 Equivalent wind load of the structural along-wind direction vibration ... 20
4.3 Equivalent wind load for structural across-wind direction and torsional vibration .. 24
4.4 Fluctuating wind load of along-wind direction ... 28
5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic
Damper ... 30
5.1 General requirements ... 30
5.2 Damping force model ... 31
5.3 Design specification ... 33
5.4 Testing ... 35
5.5 Connection and installation ... 37
6 Wind-Induced Structural Vibration Control Based on Tuned Mas/Liquid Damper . 38
6.1 General requirements ... 38
6.2 Mechanical parameters of tuned mass/liquid damper ... 38
6.3 Design specification ... 41
6.4 Testing ... 44
6.5 Connection and installation ... 45
7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned
Mass Damper ... 47
7.1 General requirements ... 47
7.2 Design specification ... 47
7.3 Testing ... 55
7.4 Installation and acceptance requirements ... 56
8 Seismic Resistance Design Requirements for Wind Vibration Control System ... 57
Explanation of Wording in This Standard ... 58
List of Quoted Standards ... 59
2 Terms and Symbols
2.1 Terms
2.1.1 Controlled structure
The building structure installed wind-induced structural vibration control system.
2.1.2 Wind-induced structural vibration control system
Components and devices that are installed on the controlled structure to provide control force
for the structure, increase structural damping or change the structural stiffness to reduce the
wind-induced response of the structure.
2.1.3 Combined system of controlled building structures and wind-induced vibration control
system
The system that is composed of controlled structure and wind-induced structural vibration
control system.
2.1.4 Designed wind load
The wind load that is used in the wind vibration control design and wind vibration response
checking calculation of the controlled structure, including equivalent wind load and wind load
time-history.
2.1.5 Addition damping ratio
When the damping effect of the wind-induced structural vibration control system is equivalent
to increasing the damping ratio of the controlled structure, the calculated damping ratio
provided by the wind-induced structural vibration control system to the controlled structure.
2.1.6 Equivalent wind load
The standard value of equivalent wind load that is included in the wind-induced structural
vibration control system to provide addition damping ratio effects to the controlled structure.
2.1.7 Viscous damper
A velocity-dependent damper that generates damping and consumes structural vibration energy
through the viscous fluid motion inside the damper.
2.1.8 Viscoelastic damper
A velocity-dependent damper that produces damping and consumes structural vibration energy
through the shear deformation of viscoelastic materials.
2.1.9 Tuned mass/liquid damper
It refers to the control system that absorbs and dissipates structural vibration energy by forming
resonance with the structure to reduce the wind-induced response of the structure, including
tuned mass dampers and tuned liquid dampers.
2.1.10 Effective mass of tuned mass/liquid damper
The part of the mass of the tuned mass/liquid damper that participates in the vibration to absorb
and dissipate the vibration energy of the controlled structure.
2.1.11 Active-passive hybrid tuned mass damper
A wind-induced structural vibration control system consisting of a passive tuned mass damper
and an active drive control device.
2.1.12 Active control algorithm
It is an algorithm for determining the active control force of structures online and in real time
by taking structural response information or real-time load information as input.
2.1.13 Designed displacement of wind-induced structural vibration control system
The maximum displacement of the wind-induced structural vibration control system that is
calculated according to the designed wind load and considers the amplification of the safety
factor.
2.1.14 Designed velocity of wind-induced structural vibration control system
The maximum velocity of the wind-induced structural vibration control system that is
calculated according to the designed wind load and considers the amplification of the safety
factor.
2.1.15 Designed control force of wind-induced structural vibration control system
The maximum control force of the wind-induced structural vibration control system that is
calculated according to the designed wind load and considers the amplification of the safety
factor.
2.1.16 Allowable displacement of wind-induced structural vibration control system
The maximum displacement that is allowable to be withstood by the wind-induced structural
vibration control system.
2.1.17 Allowable velocity of wind-induced structural vibration control system
The maximum velocity that is allowable to be withstood by the wind-induced structural
vibration control system.
3 Basic Requirements
3.1 General requirements
3.1.1 The wind-induced structural vibration control system should be selected according to the
following provisions:
1 The viscous and viscoelastic dampers should be used for the controlled structures with
large relative displacement and relative velocity between stories;
2 The viscoelastic damper should be used die the controlled structure with a small
temperature range of the damper;
3 The tuned mass/liquid damper should be used for the controlled structure with relatively
small damping;
4 The active-passive hybrid tuned mass damper should be used for the controlled structure
that requires high damping efficiency of the structural wind-induced vibration.
3.1.2 The wind-induced structural vibration control system should be installed separately along
the two main axes of the structure according to the vibration reduction requirements; and the
plane layout should not cause the structure to generate torsional response.
3.1.3 The vertical layout position of the wind-induced structural vibration control system should
be optimized and determined according to the vibration characteristics of the controlled
structure and the characteristics of the adopted vibration control technology.
3.1.4 The installation location of the wind-induced structural vibration control system shall be
convenient for inspection, maintenance and replacement.
3.1.5 The wind-induced structural vibration control system shall meet the following
requirements:
1 The wind-induced structural vibration control system shall work normally under the action
of the wind load standard value; and its ...