摘要
国内山区峡谷区域的桥梁一般具有高墩大跨的特点,作用在主梁及墩上的风荷载会很大,确定桥梁的设计基准风速与风荷载就变得十分重要。结合某连续刚构箱梁桥算例,对比《公路桥涵设计通用规范》和《公路桥梁抗风设计规范》中对主梁横桥向风荷载计算的规定,指出两部规范的差异,为山区峡谷桥梁抗风设计提供理论依据;通过联系现有研究和规范分析了设计基准风速的确定,并结合某桥算例分析了各自算法的合理性,从而确定采用现有研究的方法计算山区桥梁设计基准风速,并按《公路桥梁抗风设计规范》规定计算山区桥梁的静阵风荷载更为合理。
The bridges built in these areas generally have the features with high pier and long span,the wind load on the main beams and piers will be great.Therefore,the wind load and its inner forces gradually become a major factor in controlling such bridge design,and is important to determine the design wind speed and the wind load.This paper analyzes and compares the differences of the transverse wind load calculation about long span continuous rigid frame bridges with tall piers in the General Code for Design of Highway Bridges and Culverts and the Wind-Resistent Design Specification for Highway Bridges and are compared by a numeric example.It provides a theoretical basis for the calculation and analysis of the wind stability design of the bridges in the mountainous area.On this basis,considering the existing studies,we analyz and determinie the design wind speed of the bridge by a numerical example.In the end,this paper proposes a method for calculating the design wind speed of the bridge according to the existing studies according to Culverts and the Wind-Resistent Design Specification for Highway Bridges.
出处
《江南大学学报（自然科学版）》
CAS
2014年第3期324-329,共6页
Joural of Jiangnan University (Natural Science Edition)
关键词
山区
桥梁
抗风
设计基准风速
横桥向
风荷载
mountains area
bridge
wind resistance
design wind speed
transverse
wind load
