Seismic Resistance of Composite Coupled Walls

WPC 2 Y B Z V #|X U^ x @ X @ C10节距 zN x x x x U^ x @ X @ 2 Z C10节距 #|X 2 : F R 12-21-93 03：46p 丹娜·布里格姆 . 3英尺 3 '标准 3英尺 3 '标准 X ` H p X （# % '0*，.81 3 5@8：H？一 4 D L ! 3英尺 3 '标准 3英尺 3 '标准 3英尺 3 '标准 3英尺 3 '标准 3英尺 3 '标准 3英尺 3 '标准 # X \ P C U^X P# 9319838 Bahram Shahrooz该项目进行基础研究，检查采用混合钢混凝土结构的结构的基本行为，这已经落后。 现有的知识库，特别是一个大类的混合结构的抗震性能需要扩大之前，可以建立全面的设计规定，以推进工程实践。 混凝土墙或核心通常由钢梁连接，钢周边框架通常通过悬臂梁连接到中央混凝土核心。 一个主要的问题是力从钢连梁或悬臂梁传递到墙或核心，特别是超过正常使用极限状态。 对通过钢梁或组合梁连接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，代表半规模的网络。 试件包括钢筋混凝土墙的一部分和模拟连梁一半的短钢梁（无论是封装或未封装）。 将研究的参数包括：（a）连梁上下施工缝的影响;（B）连接区域的边界单元横向钢筋;（c）连梁增加面支承板，以调动 h）的 0* 0*0 （d）确定钢连梁尺寸的原理，即设计为偏心支撑框架中的连接梁或“规则弯曲”构件，以便在塑性弯矩承载力发展之前防止腹板屈服;（e）外包钢连梁与非外包钢连梁的性能;以及（f）防止翼缘和腹板过早屈曲的要求。 该项目将为此类耦合结构体系的设计模型和抗震准则的制定提供基本输入。

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.