ACI 318-25 是 American Concrete Institute（ACI）2025 年发布的《Building Code Requirements for Structural Concrete》（结构混凝土建筑规范），是 ACI 318 系列的最新版本，继 ACI 318-19 之后的重要更新。该规范为结构混凝土的设计、施工、材料、检验和强度评估提供了最低标准，适用于建筑物和非建筑结构。
一、适用范围
- 包括现浇、预制、喷射混凝土、素混凝土、非预应力和预应力混凝土结构；
- 适用于所有结构构件和连接，如梁、柱、板、墙、基础、节点、锚固等；
- 可用于普通建筑结构，也适用于非建筑结构（如储罐、塔架等）。
二、主要内容包括
- 材料要求：混凝土、钢筋、预应力钢绞线、锚固材料等的性能指标；
- 设计方法：强度设计法（LRFD）和容许应力法（ASD）并存，提供荷载组合、强度折减系数等；
- 构件设计：涵盖受弯、受剪、受压、受拉、扭转、冲切等设计方法；
- 预应力混凝土：包括预应力损失、锚固区设计、应力限制等；
- 抗震设计：提供不同抗震性能等级下的构造要求和设计条款；
- 锚固与连接：包括机械锚栓、化学锚栓、钢筋搭接与锚固长度等；
- 施工与检验：包括模板、浇筑、养护、试验、质量控制等要求；
- 既有结构评估：提供结构强度评估和加固设计方法；
- 附录新增内容：
三、主要更新亮点（相对于 ACI 318-19）
- 新增后植钢筋（post-installed reinforcing bars）设计条款；
- 增强剪切摩擦（shear friction）设计方法；
- 引入结构韧性（resilience）与可持续性（sustainability）相关条款；
- 更新抗震与风荷载相关设计条款，适配最新 ASCE 7-22；
- 增加非线性分析验证设计的正式附录；
- 提供性能目标风设计（Performance-Based Wind Design, PBWD）方法，允许按性能目标进行风荷载设计。
四、使用方式
- 可作为法律性文件被各地建筑规范引用（如 IBC）；
- 提供英文英寸-磅单位版本，另有 SI 单位制和国际语言版本（如西班牙语）；
- 可通过 ACI 318 PLUS 平台获取互动式数字版本，附带注释、设计示例和图表工具。
五、应用价值
ACI 318-25 是全球混凝土结构设计领域最具权威性的规范之一，广泛用于美国及国际工程项目。其更新反映了现代混凝土结构在抗震、抗风、可持续性和性能化设计方面的最新研究成果，是工程师、设计师、施工单位和审图机构的重要参考依据。
Building Code for Structural Concrete – Code Requirements and Commentary ACI CODE-318-25 PDF Download
Standard Details
Description
The “Building Code for Structural Concrete” (“Code”) provides minimum requirements for the materials, design, and detailing of structural concrete buildings and, where applicable, nonbuilding structures. The Code was developed using a consensus process and addresses structural systems, members, and connections, including cast-in-place, precast, shotcrete, plain, nonprestressed, and prestressed, construction. Among the subjects covered are: design and construction for strength, serviceability, and durability; load combinations, load factors, and strength reduction factors; structural analysis methods; deflection limits; mechanical and adhesive anchoring to concrete; development and splicing of reinforcement; construction document information; field inspection and testing; methods to evaluate the strength of existing structures; design verification using nonlinear response history analysis in Appendix A; performance-based wind design in Appendix B, and sustainability and resilience in Appendix C. Uses of the Code include adoption by reference in a general building code, and earlier editions have been widely used in this manner. The Code is written in a format that allows such reference without change to its language. Commentary is provided for background information and further explanation of the code requirements. Cited references provide research data useful in studying technical issues in greater detail. Other references, provide greater insight into the code the requirements. Technical changes from ACI CODE-318-19 to ACI CODE-318-25 are indicated by change bars in the margins of the print and PDF versions.
Keywords: admixtures; aggregates; anchorage (structural); beam-column frame; beams (supports); caissons; cements; cold weather; columns (supports); combined stress; composite construction (concrete to concrete); compressive strength; concrete; construction documents; construction joints; continuity (structural); contraction joints; cover; curing; deep beams; deep foundations; deflections; drilled piers; earthquake-resistant structures; flexural strength; floors; footings; formwork (construction); hot weather; inspection; isolation joints; joints (junctions); joists; lightweight concretes; load tests (structural); loads (forces); mixture proportioning; modulus of elasticity; moments; piles; placing; plain concrete; precast concrete; prestressed concrete; prestressing steels; quality control; reinforced concrete; reinforcing steels; resilience; roofs; serviceability; shear strength; shotcrete; spans; splicing; strength analysis; stresses; structural analysis; structural design; structural integrity; structural walls; sustainability; T-beams; torsion; walls; water; welded wire reinforcement.
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