6月4日上午，賓夕法尼亞州立大學(xué)陳幼佳教授應(yīng)邀來院，為師生們帶來了一場(chǎng)題為“Structural steel design - AISC versus GB: Principles and examples（鋼結(jié)構(gòu)設(shè)計(jì)—AISC與GB對(duì)比：原理與示例）”的精彩學(xué)術(shù)報(bào)告。本次報(bào)告由我院院長(zhǎng)甘丹教授主持，吸引了眾多青年教師和研究生的參與。
報(bào)告伊始，陳幼佳教授以2023版美國AISC LRFD（荷載和強(qiáng)度系數(shù)設(shè)計(jì)）與2017版中國GB 50017（鋼結(jié)構(gòu)設(shè)計(jì)標(biāo)準(zhǔn)）為核心，介紹了兩者的設(shè)計(jì)理念。AISC LRFD設(shè)計(jì)基于概率論方法，強(qiáng)調(diào)通過荷載與抗力因子實(shí)現(xiàn)安全性與經(jīng)濟(jì)性的平衡；GB規(guī)范則更傾向于采用統(tǒng)一的強(qiáng)度設(shè)計(jì)值，簡(jiǎn)化了計(jì)算過程，但可能在某些情況下導(dǎo)致設(shè)計(jì)偏保守。為直觀展現(xiàn)中美規(guī)范在工程實(shí)踐中的差異，陳教授列舉多個(gè)具體案例，詳細(xì)對(duì)比了二者在應(yīng)力計(jì)算、穩(wěn)定性校核及螺栓連接設(shè)計(jì)中的不同。例如，在相同荷載條件下，GB規(guī)范對(duì)螺栓連接的設(shè)計(jì)要求比AISC高出約28.7%，而在焊接連接中，GB的保守性甚至可能達(dá)到42%。陳教授強(qiáng)調(diào)，這種差異源于兩國規(guī)范對(duì)安全儲(chǔ)備、材料性能及施工工藝的不同考量。
最后，陳幼佳教授與現(xiàn)場(chǎng)師生就如何在實(shí)際工程中選擇合適的規(guī)范、如何優(yōu)化設(shè)計(jì)以提高經(jīng)濟(jì)性等問題展開了熱烈討論。陳教授表示，隨著全球化進(jìn)程的加快，中美規(guī)范的融合趨勢(shì)日益明顯，工程師應(yīng)具備跨規(guī)范設(shè)計(jì)的能力，并結(jié)合項(xiàng)目特點(diǎn)靈活應(yīng)用。本次講座為師生提供了寶貴的國際視野，促進(jìn)了中美鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范的交流與學(xué)習(xí)，對(duì)理解中美鋼結(jié)構(gòu)設(shè)計(jì)差異具有重要意義。
圖1 報(bào)告現(xiàn)場(chǎng)
圖2 交流互動(dòng)
Frank Chen is a professor emeritus of the Pennsylvania State University, USA. His research covered broadly on dynamic soil-structure interaction, computational methods, limit states design, seismic analysis and design, floor vibrations, sustainable materials, geo-environmental engineering, historical structures, composite structures, wind engineering, high-speed rail bridges, and AI applications. His publication record includes 321 high quality refereed journal papers, 2 technical manuals, 58 plus research reports, 1 book, 3 book chapters, and 1 patent. Also, he is a registered professional engineer and has been an active technical consultant to various organizations. Prof. Chen has received a number of honors and awards including Outstanding Research Award from the University (multiples), Research Fellow from National Sciences Council on Taiwan (multiples), Daniel P. Jenny Research Award from Prestressed Concrete Institute (twice). Prof. Chen has been actively involved with various technical committees within ASCE (American Society of Civil Engineers), ACI (American Concrete Institute), AISC (American Institute of Steel Construction), and AASHTO (American Association of State Highway and Transportation Officials). He has been also an editor for Materials Testing (Germany), Journal of Structural Integrity and Maintenance (UK), and Engineering Applications of Artificial Intelligence (UK).
