【精品】钢筋混凝土和预应力混凝土梁式桥教学教材

3.3 Method for computing the transverse distributive coefficient 荷载横向分布系数计算
2. Method based on mechanics of leverage 杠杆原理法
2）适用范围 双主梁桥 有水平纵向缝的装配式桥 荷载作用于支点处 无中间横隔梁的梁桥
BRIDGE ENGRG PART II
Part 2 RC & PC beam bridge
第二篇 钢筋混凝土和预应力混凝土梁式桥
Chapter 3
第三章
Analysis of simple supported beam bridge
简支梁桥的计算
• SCHOOL OF TRANSPORTATION, WUT
2）Concept about the transverse distributive coefficient 荷载横向分布概念
3）Method for computing the transverse distributive coefficient 荷载横向分布系数计算方法
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
3.3 Computation of Coefficients of Transverse Distribution of Loads 荷载横向分布计算
1. Introduction 概述
1）Influence line and influence surface 影响线与影响面
o
y
z
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Diagram of the Coefficients of Transverse Distribution of Loads 横向分布系数图示
P2/2
mP2P2/2 P2/2
P1/2
P2/2
mP1P1/2 P1/2
P1/2
3.3 Method for computing Coefficients of Transverse Distribution of Loads 荷载横向分布系数计算
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
3.3 Method for computing the transverse distributive coefficient 荷载横向分布系数计算
2. 杠杆原理法
杠杆原理
2#梁承受的荷载为：
R R1 R2
Two special cases 荷载横向分布集系数的两种特殊情形
No transverse connection 横向无联系
Rigid transverse connection 横梁刚度无限大
P
P
3 m3=1
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3 m3=1/5
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1
P 2
2
P 2
i P 2
m q P
P/2
P/2
1
2
3
Fra Baidu bibliotek
R1 R2
η1
η2
支座反力影响线
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
3.3 Method for computing the transverse distributive coefficient 荷载横向分布系数计算
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
3.3 Method for computing the transverse distributive coefficient 荷载横向分布系数计算
2. Method based on mechanics of leverage 杠杆原理法
Influence line of the Internal force
内力影响线
P
S= Pη 1(x)
o
z
x
η 1(x)
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
3.3 Computation of Coefficients of Transverse Distribution of Loads 荷载横向分布计算
1）Assumption 原理假设 This method is based on the weak connection between girders 忽略主梁之间的横向联系作用，即假设桥面板在主梁上断开。
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
PRODUCED BY：X J CHEN
3.3 Computation of Coefficients of Transverse Distribution of Loads 荷载横向分布计算
1. Introduction 概述
Simple supported beam简支梁 one dimension一维杆件
1. Introduction 概述
Superstructure system上部结构系------two dimension 二维
Influence surface of the Internal force 内力影响面
P (x, y)
x
S= Pη (x,y)
η (x,y)
• SCHOOL OF TRANSPORTATION, WUT
3.3 Method for computing Coefficients of Transverse Distribution of Loads 荷载横向分布系数计算
1. Introduction 概述
3）荷载横向分布系数计算方法 杠杆原理法 Method based on mechanics of leverage 偏心压力法 Method based on stiffness transverse connection 横向铰接梁（板）法 横向刚接梁法 比拟正交异性板法
2. 杠杆原理法
3）Example 计算实例
• SCHOOL OF TRANSPORTATION, WUT
PRODUCED BY：X J CHEN
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