Chapter 2 Gravity Load 2.1 Structure self-weight 2.2 Floor and roof live load 2.3 Snow load 2.4 Crane load 2.5 Vehicle load 2.6 Assembly of person load 2.7 Soil vertical earth pressure and lateral pressure G 归东理子大军 SHANDONG UNIVERSITY OF TECHNOLOGY
Chapter 2 Gravity Load 2.1 Structure self-weight 2.2 Floor and roof live load 2.3 Snow load 2.4 Crane load 2.5 Vehicle load 2.6 Assembly of person load 2.7 Soil vertical earth pressure and lateral pressure
2.1 Structure self-weight Cause:gravity由地球引力引起 Assumption:uniformly distributed in calculation Calculation:the total self-weight of structure members can be expressed as 台 G-total self-weight of structure members Yi-bulk unit weight of i-th member Vi-volume of i-th member 归东理王大军 SHANDONG UNIVERSITY OF TECHNOLOGY
2.1 Structure self-weight • Cause: gravity 由地球引力引起 • Assumption: uniformly distributed in calculation • Calculation: the total self-weight of structure members can be expressed as 𝐺𝐺 = � 𝑖𝑖=1 𝑛𝑛 𝛾𝛾𝑖𝑖𝑉𝑉𝑖𝑖 𝐺𝐺 -total self-weight of structure members 𝛾𝛾𝑖𝑖-bulk unit weight of i-th member 𝑉𝑉𝑖𝑖-volume of i-th member
2.1 Structure self-weight Simplified Calculation:structure is viewed as a whole Typical bulk unit weight of structures Wood structure 2.0~2.5 k N/m3 Steel structure 2.5~4.0 k N/m3 RC structure 5.0~7.5 k N/m3 归东理工大军 SHANDONG UNIVERSITY OF TECHNOLOGY
2.1 Structure self-weight • Simplified Calculation: structure is viewed as a whole • Typical bulk unit weight of structures ▫ Wood structure 2.0~2.5 𝑘𝑘 𝑁𝑁⁄𝑚𝑚3 ▫ Steel structure 2.5~4.0 𝑘𝑘 𝑁𝑁⁄𝑚𝑚3 ▫ RC structure 5.0~7.5 𝑘𝑘 𝑁𝑁⁄𝑚𝑚3
2.2 Live load on floor and roof 1. Live load on floor of residential building民用建筑楼面活荷载 Definition:gravity actions due to assembly of persons,furniture and facilities.The magnitude varies with time and the location is movable. Therefore,this live load is also called variable load. Depending on variation characteristic with time,live load can be divided into: 。 Sustained live load持久性活荷载 在某个时间段内基本保持不变的荷载，如家具、物品、常住人员等。 Intermittent live load临时性活荷载 楼面上偶尔出现的短期荷载，如聚会人群、装修材料的堆积等。 :大军 SHANDONG UNIVERSITY OF TECHNOLOGY
2.2 Live load on floor and roof 1. Live load on floor of residential building民用建筑楼面活荷载 ▫ Definition: gravity actions due to assembly of persons, furniture and facilities. The magnitude varies with time and the location is movable. Therefore, this live load is also called variable load. Depending on variation characteristic with time, live load can be divided into: • Sustained live load 持久性活荷载 在某个时间段内基本保持不变的荷载，如家具、物品、常住人员等。 • Intermittent live load 临时性活荷载 楼面上偶尔出现的短期荷载，如聚会人群、装修材料的堆积等
2.2 Live load on floor and roof 1.Live load on floor of residential building民用建筑楼面活荷载 Determination: The determination of nominal value,combination value,frequent value and quasi-permanent value can refer to Table 5.1.1 in Code (Table2-1 in textbook) 表5.1.1民用建筑楼面均布活荷载标准值及 其组合值、频遇值和准永久值系数 项次 类别 标准值组合值疑语值 准永久值 kN/㎡燕数中，系数中 系数中。 (1】住宅、宿舍、能馆、办公楼、 2.0 0.7 0.5 0.4 医腕病房、托儿所、幼儿园 (2引试验室、阅览室、会议室、医 2.0 0.7 0.6 05 院门诊童 教室、食堂、餐厅、一般资料档 2.5 0.7 0.6 0.5 案室 归东理工大军 SHANDONG UNIVERSITY OF TECHNOLOGY
2.2 Live load on floor and roof 1. Live load on floor of residential building民用建筑楼面活荷载 ▫ Determination: The determination of nominal value, combination value, frequent value and quasi-permanent value can refer to Table 5.1.1 in Code (Table2-1 in textbook)