Seismic Resistance of Composite Coupled Walls

WPC 2 Y B Z V #| x U^ x @ x @信使10螺距Z N x x x U^ x @ x @ 2 Z信使10螺距#| x 2: F R 12-21-93 03:46p Dana Brigham Dana Brigham。3 ‘ 3 ’标准的3 ‘ 3 ’标准的X ' h p X (# % '0*,；81 3 5@8: h ？A 4 d 1 ！3 ‘ 3 ’标准3 ‘ 3 ’标准3 ‘ 3 ’标准3 ‘ 3 ’标准3 ' 3 ‘ 3 ’标准3 ' 3 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ‘ ’钢-混凝土混合结构的性能分析。在建立全面的设计规定以推进工程实践之前，需要扩大现有的知识库，特别是关于大型混合结构抗震性能的知识库。混凝土墙或核心经常由钢梁连接，钢制周长框架通常通过支腿梁连接到中央混凝土核心。一个主要的问题是力从钢连接梁或支腿梁传递到墙壁或核心，特别是超过使用极限状态。本文对通过钢梁或组合梁耦合的混凝土墙的基本抗震性能进行了试验和分析研究。研究的实验阶段包括测试六个独立的连接，代表半比例的组件。试样包括钢筋混凝土墙和短钢梁（无论是封闭或未封闭）的一部分，模拟耦合梁的一半。将研究的参数包括：(a)耦合梁上下施工缝的影响；(b)连接区域边界元横向配筋；(c)在连接梁上增加面承板，努力调动连接区域的h) 0*0*0*压杆；(d)确定连接钢梁尺寸的原则，即设计为偏心支撑框架中的连接梁或“规则弯曲”构件，以便在塑性弯矩能力发展之前防止腹板屈服；(e)密封与非密封钢耦合梁的性能；防止法兰和腹板过早屈曲的要求。该项目将为开发适当的设计模型和此类耦合结构系统的地震指南提供基本输入。

WPC 2 Y B Z V #| x U^ x @ X @ Courier 10 Pitch z N x x x U^ x @ X @ 2 Z Courier 10 Pitch #| x 2 : F R 12-21-93 03:46p Dana Brigham Dana Brigham . 3 ' 3 ' Standard 3 ' 3 ' Standard X ` h p x (# % '0* , .81 3 5@8 : H? A 4 D L ! 3 ' 3 ' Standard 3 ' 3 ' Standard 3 ' 3 ' Standard 3 ' 3 ' Standard 3 ' 3 ' Standard 3 ' 3 ' Standard # x \ P C U^X P# 9319838 Bahram Shahrooz This project conducts basic research examining fundamental behavior of structures employing mixed steel concrete construction which has been lagging. The existing knowledge base, particularly for seismic performance of a large class of mixed constructions needs to be expanded before comprehensive design provisions can be established to advance engineering practice. Concrete walls or cores have been frequently coupled by steel beams, and steel perimeter frames are commonly attached to central concrete cores through outrigger beams. A major concern is the transfer of forces from steel coupling beams or outrigger beams into the walls or cores, particularly beyond the serviceability limit state. An experimental and analytical study of the fundamental seismic performance of concrete walls coupled through steel or composite beams is undertaken. The experimental phase of the research includes testing of six isolated connections representing half scale subassemblies. The specimens comprise a portion of a reinforced concrete wall and stub steel beams (either encased or unencased) simulating one half of a coupling beam. The parameters that will be investigated include: (a) effects of construction joints above and below coupling beams; (b) boundary element transverse reinforcement in the connection region; (c) addition of face bearing plates to the coupling beam as an effort to mobilize h) 0*0*0* compression struts in the connection region; (d) philosophies for sizing steel coupling beams, i.e. design as link beams in eccentrically braced frames or as "regular flexural" members such that web yielding will be prevented prior to development of plastic moment capacity; (e) performance of encased versus unencased steel coupling beams; and (f) requirements for preventing premature flange and web buckling. The pr oject will provide basic input for developing appropriate design model and seismic guidelines for such coupled structural systems.