Prof. Raffaele Di Laora
拉斐尔·迪·劳拉教授
意大利坎帕尼亚大学“路易吉·万维泰利”工程系岩土工程副教授；曾任ISSMGE TC212桩基础技术委员会秘书
Lecture
桩基础设计的创新方法
Innovative Methods for Pile Foundation Design
Biography
嘉宾介绍
拉斐尔·迪·劳拉教授现任意大利坎帕尼亚大学“路易吉·万维泰利”工程系岩土工程副教授。其研究工作主要聚焦桩基础，尤其关注地震作用下桩基的设计与分析，同时涉及地震作用下挡土结构、边坡加固桩、能源桩和吸力筒基础等方向。
他曾受邀在世界各地的学术机构和产业组织发表演讲，曾任国际土力学与岩土工程学会桩基础技术委员会（ISSMGE TC212）秘书。其已在国际期刊发表或合作发表论文50余篇，并作为项目负责人或参与者承担多项国内外科研项目，同时担任两本国际期刊的副主编。
Lecture Abstract
报告摘要
中文内容根据会务组提供的英文Biography与Abstract整理。
传统桩群在竖向偏心荷载作用下的设计，通常以受力最大桩达到破坏作为外部极限荷载判据，而水平荷载则单独处理。该方法虽然安全，但较为保守，未能充分利用桩群体系的延性能力；对于钢筋混凝土桩，还忽略了轴力对截面屈服弯矩的重要影响，同时也往往未考虑外部荷载三个分量之间可能产生的不利耦合作用。
近年来，基于破坏包络面的综合设计方法逐渐发展，可在统一框架中描述多种荷载效应的耦合作用。报告将介绍此类包络面的建立方法，讨论其精度、实施便捷性以及在承载能力极限状态下实现更合理、更经济设计的潜力。在此基础上，报告还将把相关概念扩展至正常使用极限状态，并通过典型工程应用说明该方法在实际桩基础设计中的有效性和适用性。
Biography — English+
Raffaele Di Laora is Associate Professor of Geotechnical Engineering at the Engineering Department of University of Campania ‘Luigi Vanvitelli’. His research activity is mainly focused on pile foundations, with special regards on the design and analysis of piles under seismic actions. Further topics covered by his research interest are retaining walls under seismic actions, slope-stabilizing piles and thermal piles, suction caissons. He has been invited speaker in both academic and industrial organizations worldwide. He has been Secretary of the Technical Committee (TC212) on pile foundations of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE). He is author or co-author of more than 50 papers on International Journals. He was and is currently Principal Investigator and/or participant in several national and international research projects and serves as Associate Editor for 2 International Journals.
Abstract — English+
The conventional design of pile groups under vertical eccentric loading typically defines the ultimate external load as that which causes failure of the most stressed pile, while lateral loads are usually treated separately. Although safe, this approach is inherently conservative: it disregards the system’s ductile capacity and, in the case of reinforced concrete piles, the crucial influence of axial load on the sectional yielding moment. Moreover, the interaction among the three components of external loading, often detrimental, is generally neglected.
Recent advances have introduced more integrated design methods based on failure envelopes, which capture these coupled effects within a unified framework. The paper will examine the formulation and construction of such envelopes, highlighting their accuracy, simplicity of implementation, and the significant potential they offer for more rational and economical design at the Ultimate Limit State. Building on this basis, the discussion extends the concept to the Serviceability Limit State, outlining a consistent and practical pathway from ultimate to serviceability design. Selected applications demonstrate the effectiveness and versatility of the proposed approach in real engineering contexts.