美國(guó)科羅拉多大學(xué)教授，北京市特聘教授，土木交通學(xué)院結(jié)構(gòu)與新型材料研究所所長(zhǎng)。

科羅拉多大學(xué)是美國(guó)著名研究類型大學(xué), 有數(shù)位諾貝爾獎(jiǎng)獲得者.其結(jié)構(gòu)工程在世界上有很高的聲譽(yù)。 席云平是目前該學(xué)科大陸旅美華人最活躍的學(xué)者之一。 歷任美國(guó)土木工程師協(xié)會(huì)工程力學(xué)分會(huì)材料性能委員會(huì)主席(2003.10 – 2006.10)，美國(guó)科羅拉多大學(xué)土木環(huán)境及建筑工程系結(jié)構(gòu)實(shí)驗(yàn)室主任 ，美國(guó)科羅拉多州公路系統(tǒng)技術(shù)協(xié)助中心主任，美國(guó)土木工程師協(xié)會(huì)《工程力學(xué)》雜志副主編 (2003.10 - 2006.10)，國(guó)際性雜志《計(jì)算機(jī)在混凝土中的應(yīng)用》編委會(huì)委員 ，國(guó)際性雜志《混凝土科學(xué)和工程》(RILEM)編委會(huì)委員，美國(guó)國(guó)家科研基金會(huì)科羅拉多大學(xué)地震研究中心(NSF NEES center at Univ. of Colorado at Boulder) 顧問委員會(huì)委員，國(guó)際混凝土徐變協(xié)會(huì)指導(dǎo)委員會(huì)委員， 科羅拉多大學(xué)土木環(huán)境及建筑工程系執(zhí)行委員會(huì)(executive committee ) 委員 ，科羅拉多大學(xué)工學(xué)院科研委員會(huì)委員，科羅拉多大學(xué)結(jié)構(gòu)工程及結(jié)構(gòu)力學(xué)教研室負(fù)責(zé)人 (2002-2003)，科羅拉多大學(xué)土木環(huán)境及建筑工程系教學(xué)大綱編委會(huì)委員 (1999-2001)。

主要研究方向：建筑材料長(zhǎng)期耐久性的理論分析和試驗(yàn)、結(jié)構(gòu)長(zhǎng)期性能的監(jiān)測(cè)和模擬、發(fā)展新型混凝土, 新型耐火高強(qiáng)混凝土材料, 廢棄物的循環(huán)應(yīng)用。自1993年在美任教以來(lái)，已主持完成了70余項(xiàng)科研項(xiàng)目，總計(jì)經(jīng)費(fèi)六百余萬(wàn)美元.

主要論文：

Koller, R., Chang, S.Y., and Xi, Y. (2007) “Fiber Reinforced Polymer Bars under Freeze-Thaw Cycles and Different Loading Rates”, Journal of Composite Materials, 41(1), 5-25.

Suwito, A., Ababneh, A., Xi, Y., and Willam, K. (2006) “The Coupling Effect of Drying Shrinkage and Moisture Diffusion in Concrete”, Computers & Concrete, 3(2-3), 103-122.

Suwito, X.-C. Cai, and Y. Xi (2006) “Parallel Finite Element Method for Coupled Chloride Penetration and Moisture Diffusion in Concrete”, International Journal of Numerical Analysis and Modeling, 3(4), 481-503.

Xi, Y., Eskandari-Ghadi, M., Suwito, and Sture. S. (2006) “A Damage Theory Based on Composite Mechanics”, J. of Eng. Mech., ASCE, 132(11), 1-10.

Li, Y., and Xi, Y. (2006) “Study on the Properties of Portland Cement Mortar and Concrete Containing Crumb Rubber Aggregate”, Concrete, 200, 45-48 (in Chinese).

Li, Y., Lee, J.S., and Xi, Y. (2005) "Study on Sulfur Rubber Concrete", J. of Building Materials, 8(4), 368-372 (in Chinese).

Xi, Y. and Nakhi, A. (2005) “Composite Damage Models for Diffusivity of Distressed Materials”, J. of Materials in Civil Engineering, ASCE, May/June, 17(3), 286-295.

Willam, K., Rhee, I., and Xi, Y. (2005) “Thermal Degradation in Heterogeneous Concrete Materials”, J. of Materials in Civil Engineering, ASCE, May/June, 17(3), 276-285.

Asiz, A., Zhang, W., and Xi, Y. (2003) “Analysis of Aging of Piezoelectric Crystal Resonators”, IEEE Transactions on Ultrasonic, Ferroelectric, and Frequency Control (IEEE-UFFC), 50(12), 1647- 1655.

Roh, Y.S., Asiz, A., Zhang, W.P., and Xi, Y. (2003) “Experimental Study and Theoretical Prediction of Aging Induced Frequency Shift of Crystal Resonators and Oscillators”, Microelectronics Reliability, 43(12), 1993-2000.

Xie, Z.H., Wen, X., and Xi, Y. (2003) “ASR Potentials of Glass Aggregates in Water-Glass Activated Fly Ash and Portland Cement Mortars”, Journal of Materials in Civil Engineering, ASCE, 15(1), 67-74.

Ababneh, A., Farid Benboudjema, and Xi, Y. (2003) “Chloride Penetration in Non-Saturated Concrete”, J. of Materials in Civil Engineering, ASCE, 15(2), 183-191.

Xie, Z.H., and Xi, Y. (2002) “Use of Recycled Glass as a Raw Material in the Manufacture of Portland Cement”, Materials and Structures, RILEM, Sept. – Oct., 510-515.

Ababneh, A., and Xi, Y. (2002) “An Experimental Study on the Effect of Chloride Penetration on Moisture Diffusion in concrete”, Materials and Structures, RILEM, 35(254), 659-664.

Suwito, A., Jin, W., Xi, Y., and Meyer, C. (2002) "A Mathematical Model for the Pessimum Effect of ASR in Concrete", Concrete Science and Engineering, RILEM, 4, 23-34.

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