干旱区生态环境知识资源中心(Arid): Bridge Temperature Profiles Revisited: Thermal Analyses Based on Recent Meteorological Data from Nevada

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DOI	10.1061/(ASCE)BE.1943-5592.0001498
	Bridge Temperature Profiles Revisited: Thermal Analyses Based on Recent Meteorological Data from Nevada
	Lawson, Leanne 1; Ryan, Keri L.2; Buckle, Ian G.2
通讯作者	Ryan, Keri L.
来源期刊	JOURNAL OF BRIDGE ENGINEERING
ISSN	1084-0702
EISSN	1943-5592
出版年	2020
卷号	25 期号:1
英文摘要	Temperature profiles for bridge design were developed and introduced into current bridge design specifications after soffit cracking in prestressed concrete bridges was attributed to nonlinear temperature distribution through the superstructure depth. The profiles in the specifications are based on average conditions over wide geographical areas of the United States. As a consequence, the desert climate of the southwestern portion of the United States, with high solar radiation and extreme daily temperature differentials, could be expected to cause larger thermal gradients than those recommended in the specifications. In this study, thermal gradients in representative concrete box girder and composite steel bridge superstructures were calculated by heat flow analysis using long-term meteorological data recorded at two weather stations in Reno and Las Vegas, Nevada. This study is believed to be the first to use continuously collected weather data to allow analysis of temperature variation at any point in the season. For both types of superstructures, the calculated temperature difference between the top surface and an internal layer was typically 10 degrees C larger than the corresponding value in the current design temperature profile, suggesting that the current profile is unconservative. Furthermore, for concrete superstructures, the shape of the calculated temperature profile was better represented by a fifth-order curve than the current multilinear thermal gradient. For composite superstructures, the temperature in the steel girder (which was almost uniform over its depth) was significantly higher than that given in the design profile.
英文关键词	Thermal gradient Temperature profile Heat flow analysis Southwestern United States Desert climate Concrete superstructure Composite superstructure Shortwave radiation Longwave radiation Ambient air temperature
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000497650100018
WOS类目	Engineering, Civil
WOS研究方向	Engineering
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312112
作者单位	1.Miyamoto Int, 316 Calif Ave 358, Reno, NV 89509 USA; 2.Univ Nevada, Dept Civil & Environm Engn, Reno, NV 89557 USA
推荐引用方式 GB/T 7714	Lawson, Leanne,Ryan, Keri L.,Buckle, Ian G.. Bridge Temperature Profiles Revisited: Thermal Analyses Based on Recent Meteorological Data from Nevada[J],2020,25(1).
APA	Lawson, Leanne,Ryan, Keri L.,&Buckle, Ian G..(2020).Bridge Temperature Profiles Revisited: Thermal Analyses Based on Recent Meteorological Data from Nevada.JOURNAL OF BRIDGE ENGINEERING,25(1).
MLA	Lawson, Leanne,et al."Bridge Temperature Profiles Revisited: Thermal Analyses Based on Recent Meteorological Data from Nevada".JOURNAL OF BRIDGE ENGINEERING 25.1(2020).