详情

原文传递 Expected compressive strength in precast, prestressed concrete design: Review and discussion of regional practice

题名：	Expected compressive strength in precast, prestressed concrete design: Review and discussion of regional practice
正文语种：	eng
作者：	David M. Mante;Levent Isbiliroglu;Andric Hofrichter;Robert W. Barnes;Anton K. Schindler
作者单位：	Lafayette College in Easton Pa. and director of the Lafayette College Concrete Laboratory;;Olsson in Grand Island Neb;Department of Civil and Environmental Engineering at Auburn University;Highway Research Center and Mountain Spirit Professor in the Department of Civil and Environmental Engineering at Auburn University
关键词：	Compressive strength; deflection; expected strength; historical review; serviceability; specified strength; strength prediction
摘要：	Accurate estimates of expected concrete compres-sive strength are critical for designers to predict the deformational behavior of precast, prestressed concrete elements such as camber, deflections, and prestress losses. To explore the difference between specified and expected concrete compressive strength for Alabama bridge girders, a compressive strength data set representing 1887 girder production events was collected. The average measured concrete compressive strength for Alabama girders was 33% greater than the specified strength at prestress transfer and 59% greater than the specified 28-day strength. Available empirical strength prediction methods derived for other U.S. regions did not accurately represent the Alabama data. The most promising candidates for prediction methodologies for expected compressive strength were models based on guidance from the American Concrete Institute Committee 214 for the prediction of expected strength at prestress transfer and models based on concrete strength-growth modeling to predict 28-day strength.
出版年：	2022
期刊名称：	PCI Journal
卷：	67
期：	3
页码：	53-70