建筑结构荷载规范-英语译文

UDC
National Standard of People’s Republic of China GB
GB 50009－2001
Load Code for the Design
of building Structures
Issued on January 10, 2002 Implemented on March 01, 2002
Jointly Issued by Ministry of Construction of the People’s Republic of China
State Administration of Quality Supervision, Inspection and
Quarantine
Chapter I General Principles
1.0.1This standard is set to meet the requirements of safety, functionality, economic
efficiency of architecture design.
1.0.2This standard applies to industrial, civil housing and common architecture design. 1.0.3This standard is set according to “General Architecture Design
Standard”(GB50068-2001).
1.0.4Although there are direct effect (caused by load) and indirect effect (caused by
foundation deformation, concrete contraction, welding deformation, temperature change and earthquake etc.) in architecture design, this standard only involves effect caused by load.
1.0.5This standard is valid for 50 years design.
1.0.6In addition to this standard, other national standards on architecture should also be
conformed when it comes to the effect or load.
3.2 Load Combination
3.2.1The architecture design should take into consideration of all the load probably effecting at the same time in the process of utilization. The maximum load capacity in theory and maximum load capacity under common conditions should be combined respectively. The design job is done against the most disadvantageous load combination.
3.2.2The maximum load capacity in theory should be the combination of load effect of basic combination or occasional combination, which represented as following:
γ0S≤R(3.2.2) In the formula:
γ0——important architecture coefficient;
S——design value of load effect combination;
R——defying value of construction components should be specified according to the related architecture design standard;
3.2.3 For basic load combination, the design value S should be the most unfavorable value in the following combination:
1) The complex under the control of variable load effect:
S=γG S Gk+γQ1S Q1k+Σn i=2γQiψci S Qik(3.2.3-1) In the formula:
γG——;Individual coefficient of the permanent load should be defined as in 3.2.5
γQi--- For individual coefficient of variable load marked with “i”; γQ1 be the individual coefficient of variable load Q1 , and it should be defined as in 3.2.5
S Gk--- Is the load effect value calculated according to the permanent load standard value G k S Qik--- Is the load effect value calculated according to the variable load standard value Q ik and S Qlk is the value that controlling one among the variable load effect
ψci--- The coefficient of variable load combination Q i and should be defined in line with the standard in various chapters
n---.Is the variable load sharing the combination
2) The combination controlled by permanent load effect:
S=γG S Gk+Σn i=1γQi S Qik(3.2.3-2) Notes: 1. The design value in the basic combination only applies to the linear load effect 2. When S Qlk can not be defined, it should be the most unfavorable load effect combination in all the variable load effect.
3. When it is the combination controlled by a vertical permanent load effect, the variable load sharing the combination should only be vertical one.
2.4For raft and frame structures, the basic combination can be simplified and should be the most unfavorable value in the combination:
1) The combination controlled by variable load effect:
S=γG S Gk+γQ1S Q1k S=γG S Gk+0.9∑n i=1γQi S Qik(3.2.4) 2) The combination controlled by permanent load effect should still be as the in the formula of (3.2.3-2)
3.2.5 Individual coefficient of the basic combination should be defined as following:
1. Individual coefficient of permanent load:
1) When the effect is unfavorable for the structure
For combination controlled by variable load effect, the coefficient should be 1.2;
For combination controlled by permanent load effect, it should be 1.35;
2) When the effect is beneficial to the structure:
Generally it should be 1.0
When there is toppling, slipping or floating of the structure, it should be 0.9;
2. Individual coefficient of variable load:
Generally, it should be 1.4;
Variable load effect of industrial housing structure with the standard beyond 4kN/m3 should be 1.3;
Note: for special cases, the load effect can be fixed according to related structure design standard.
3.2.6 Design value of load effect for accidental combination should be defined according to the following: representative values of accidental load not multiplying individual coefficient; the appropriate agent value can be taken according to observing material and engineering experience when occasional load appearing together with other load; the designed formula of various load effect value under different situations can be otherwise specified.
3.2.7 The maximum load under common usage should be nominal load combination, frequent combination or quasi-permanent combination according to different design requirements and should be designed according to the following formula:
S≤ C(3.2.7) In this formula: structures or structure components meeting the specified requirements for normal usage, such as the maximum value of deformation, cracking, amplitude, acceleration, stress etc should be utilized according to related architecture standard.
3.2.8 The design value S of load effect for standard combination should be as following:
S=S Gk+S Q1k+∑n i=2ψci S Qik(3.2.8) Note: the design value in the combination only applies to linear load and load effect.
3.2.9 The design value S of load effect combination for frequently-met combination should
be:
S=S Gk+ψf1S Q1k+∑n i=2ψqi S Qik(3.2.9) In this formula:
ψf1---the frequently-met coefficient of variable load Q1 should be defined according to different chapter requirement;
ψqi--- quasi-forever coefficient of variable load Q i should be defined according to different chapter requirement.
Note: the design value in the combination only applies to linear load and load effect
3.2.10The design value S of load effect combination for quasi-forever combination should be as following:
S=SGk+∑n i=1ψqi S Qik(3.2.10) Note: the design value in the combination only applies to linear load and load effect.。