上海交通大学：《结构概念设计 Conceptual design》教学资源（课程讲义）Chapter 2 Schematic Building Forms as Total Structural System 2.1 The Assumption of Integrity

Homework 1: Using a paper (A4)to make a structure with height of 105mm,which can bear the higher vertical loads(only folding without glue)

Homework 1: Using a paper (A4) to make a structure with height of 105mm, which can bear the higher vertical loads (only folding without glue)

Review the Key Points in Chapter 1

Review the Key Points in Chapter 1

Three design processes and feedback I.Schematic design level (Conceptualization of building form as total structural system and subsystem) *II.Preliminary design level (Preliminary design of subsystem and key components) III.Final design level (Final in-depth design refinement of all subsystem and structural components)

Three design processes and feedback * I. Schematic design level (Conceptualization of building form as total structural system and subsystem) *II. Preliminary design level (Preliminary design of subsystem and key components)on * III. Final design level (Final in-depth design refinement of all subsystem and structural components)

Three key points in design * System for activity needs, (Spatial form organization) System for physical needs, (Structure,construction,energy,equipment) System for symbolic needs (Aesthetics,sociality,humanity,culture etc.)

Three key points in design * System for activity needs, (Spatial form organization) * System for physical needs, (Structure, construction, energy, equipment) * System for symbolic needs (Aesthetics, sociality, humanity, culture etc.)

Structural Engineer-Concern the force flow-横向传递型结构 主三三三三三三三三三三三三三三三一 受压区 “力流”(force flow是结构中荷载由作用点到地基支座传递的几何 轨迹和构件受力大小的形象表述。力流有方向和强度两个特性。力 流有类似“水流”的自然特性。 工程师的任务就是在结构中设计或策划力流导向找到一条最短最流 畅的力流轨迹线，这也就是结构设计中选择平立面布置的基本理念

Structural Engineer --- Concern the force flow--横向传递型结构 P 受压区 “力流”(force flow)是结构中荷载由作用点到地基支座传递的几何 轨迹和构件受力大小的形象表述。力流有方向和强度两个特性。力 流有类似“水流”的自然特性。 工程师的任务就是在结构中设计或策划力流导向,找到一条最短最流 畅的力流轨迹线，这也就是结构设计中选择平立面布置的基本理念

Chapter 2 Schematic Building Forms as Total Structural System 2.1 The Assumption of Integrity 2.2 Estimating Overall Forces 2.3 Aspect Ratios and Overturn Resistance 2.4 Strength and Stiffness of Buildings 2.5 Symmetry and Asymmetry in Building Forms

Chapter 2 Schematic Building Forms as Total Structural System 2.1 The Assumption of Integrity 2.2 Estimating Overall Forces 2.3 Aspect Ratios and Overturn Resistance 2.4 Strength and Stiffness of Buildings 2.5 Symmetry and Asymmetry in Building Forms

2.1 The Assumption of Integrity To assume the building to behave as a whole -To determine its overall loads and resistance implications for structures To analyze the overall performance for structural behavior,strength,stability and efficiency

2.1 The Assumption of Integrity - To assume the building to behave as a whole -To determine its overall loads and resistance implications for structures - To analyze the overall performance for structural behavior, strength, stability and efficiency

Basic assumption of integrated analysis Building as a rigid body fixed to ground Have mass and supported by ground -Resist environmental forces (horizontal wind and earthquake loads,etc.) -The ground must be stable enough

Basic assumption of integrated analysis - Building as a rigid body fixed to ground - Have mass and supported by ground - Resist environmental forces (horizontal wind and earthquake loads, etc.) -The ground must be stable enough

Fig.2.2 Basic load-resistance WIND BUILDINGS MUST BE BUILDINGS HAVE MASS FIXED TO GROUND BUILDINGS RESIST SUPPORTED BY GROUND ENVIRONMENTAL FORCES

Fig. 2.2 Basic load-resistance

Fig.2.3 The foundation distributes the weight of a building FORM MUST BE RIGID IN TSELF MASS PUSHES DOWN DUE TO GRAVTY FOUNDATION INTERFACES MASS FORCES WITH EARTH BEARING CAPACITY EARTH PUSHES UP TC SUPPORT MASS VIA THE FOUNDATION

Fig. 2.3 The foundation distributes the weight of a building