Masonry Lintels - ASD example

Table of Contents: 00:08 - Concrete Masonry Lintels 00:36 - Lintel (per TMS 402) - a member designed primarily to resist flexure and shear induced by loads perpendicular to it’s longitudinal axis 00:55 - Learning Objectives 01:28 - Steps for Masonry Lintel Design 01:57 - Steps for Masonry Lintel Design 02:00 - Step 1.A. Strength of Masonry 02:03 - Masonry as a System 02:22 - Masonry as a System 02:32 - What’s the Purpose of Each Component? 03:15 - f’m for Concrete Masonry 03:55 - Why is f’m So Important? 04:25 - Step 1.B. Geometry of walls, opening size 05:05 - CJs and Horizontal Reinforcement 05:31 - Masonry - control joints & minimum horiz. reinf. or additional horiz. reinf. & MINIMAL control joints 06:11 - CJ and Horizontal Reinforcement 06:32 - CJ and Horizontal Reinforcement 06:45 - CJ and Horizontal Reinforcement 07:02 - Horizontal Reinforcement Options - Expanded Table With both HJR (2x9 gage) and bb w/rebar 07:20 - Option 1-regular CJ and joint reinf 07:32 - Option 1 (with openings) 07:44 - Option 2-more horizontal reinforcement 08:00 - Option 3-more horiz reinf with joint reinf and bond beams 08:09 - Option 3 (with openings) *Seems pretty natural* 08:35 - CJ and Horizontal Reinforcement 08:44 - No CJ and continuous LINTEL 08:53 - Continuous lintels are more effective 09:04 - Perforated Shear Walls and Integrated Lintel 09:34 - Steps for Masonry Lintel Design 09:44 - 2. Loads on Lintel 09:56 - Typical Masonry Wall LoadsLateral (Wind, Seismic) 10:23 - Typical Masonry Wall LoadsGravity (Dead, Live, Snow) 10:58 - Arching Action in Masonry 11:21 - By the way, how do you analyze an arch? Here’s a simple method 11:34 - By the way, how do you analyze an arch? Here’s a simple method 11:46 - By the way, how do you analyze an arch? Here’s a simple method 12:15 - Masonry Lintel Analysis by Hand - Consider Actual Load 12:43 - Arching Action in Masonry 14:06 - Gravity Loads on Lintels 15:12 - Component Design with Simple Analysis or Finite Element Analysis? 15:46 - FEA Help Gain Understanding for Deep Lintels in “Moment Frames” 15:56 - 3D Finite Element Software Model 16:00 - 16:21 - Masonry Lintel Analysis from Finite Element Model (FEM) 16:42 - FEA Analysis Results for Different Openings in Masonry Walls 16:56 - FEA Analysis Results for 2 Different Masonry Walls 17:06 - Axial Forces in Masonry From FEM 17:48 - Axial Forces in Masonry From FEM 18:08 - Trust Forces in Masonry from FEM 18:29 - Thrust Forces in Masonry from FEM 18:59 - Vertical Shear Forces in Lintel 19:27 - Vertical Moment Forces in Lintel 19:48 - FEA Analysis Results for 2 Different Masonry Walls 20:00 - Axial Forces in Masonry from FEM 20:09 - Axial forces in masonry from FEM 20:33 - Thrust Forces in Masonry from FEM 20:40 - Thrust Forces in Masonry from FEM 21:11 - Vertical Shear Forces in Lintel 21:41 - Vertical Shear Forces in Lintel 21:57 - Vertical Moment Forces in Lintel 22:15 - Compare FEA results to hand calculations 22:15 - Compare FEA results to hand calculations 22:25 - Lintel - Full Wall - shear Force comparison 24:29 - SHEAR LOAD - 14FT OPENING 25:12 - Lintel - Full Wall - Moment Force comparison 27:07 - DESIGN MOMENT - 14FT OPENING 27:30 - Arching Action in Masonry 27:34 - Arching Action in Masonry 28:01 - 3. Design Options - Materials 28:32 - Precast Lintels 29:10 - 29:18 - Steel Lintels 30:59 - Then why are steel lintels being used….. 31:11 - 31:27 - Steel lintels | crack mitigation efforts? 31:43 - Masonry Lintels 32:17 - 32:23 - Masonry lintel | many benefits 32:40 - Multi-course masonry lintel 32:55 - Example: ASD Reinforced Masonry 33:22 - Balanced Condition 33:44 - Example: ASD Reinforced Masonry 34:37 - Example: ASD Reinforced Masonry 36:07 - Example: ASD Reinforced Masonry 36:22 - Example: ASD Reinforced Masonry 36:33 - Example: ASD Reinforced Masonry 36:49 - Example: ASD Reinforced Masonry 37:07 - Example: ASD Reinforced Masonry 38:29 - Masonry Lintel Analysis In Finite Element Model (FEM) 38:54 - Masonry Lintel in FEM 39:06 - CASE STUDY: Continuous Masonry Lintels 39:19 - CASE STUDY: Continuous Masonry Lintels 39:26 - CASE STUDY: Continuous Masonry Lintels 39:34 - Get More Capacity Out of Masonry Lintels 41:03 - Typical Masonry Lintel Detail 41:56 - Reinforcement Options 42:38 - Masonry vs “other” Lintels 44:03 - Costs Examples – Lintels 44:41 - Lintel Cost - Example 1 45:06 - Lintel Cost - Example 2 45:25 - Steel vs Masonry lintel | relative cost comparison 45:42 - Conclusions 46:32 - Questions?