January 1, 2021

Quickly Evaluate Graphical One-Way Shear Results in ADAPT-Builder

The ability to quickly evaluate results and make data-based design decisions is a key aspect of user-focused structural software. One-way shear is a critical in the design of RC and PT beams and in particular, sizing of beams and associated economy of a design. ADAPT-Builder 2020 delivers new and improved graphical analysis and design tools for one-way shear meant for quick delivery of results.

For reinforced concrete and post-tensioned models including beams and one-way slabs requiring one-way shear reinforcement, new graphical options have been added to Result Display Settings. These graphical results include Shear Stress Check, Concrete Shear Strength (Vc), Vu/Vc ratio, Asv (required shear reinforcement), Asv (provided shear reinforcement), and shear stirrup reinforcement.

Shear Stress Check

This option shows a graphical code check for each design section along a beam or one-way slab design strip for the selected strength load combination or strength envelope. The available code check status indicators of NA, OK, REINFORCE, and EXCEED CODE are reported.

Concrete Shear Strength

Reports the concrete shear capacity, øVc (or equivalent for other non-ACI design codes) of each design section. The calculated concrete shear capacity is calculated per code requirements for reinforced concrete or post-tensioned sections.

Demand vs Capacity Ratio

Reports the demand/capacity ratio (Vu/øVc) for the selected strength load combination or envelope.

Area of Shear Reinforcement Required

Reports the required area of reinforcement (Asv) per ft (US units) or per meter (SI units) based on calculation.

Area of Shear Reinforcement Provided

Reports the provided area of reinforcement (Asv) per ft (US units) or per meter (SI units) based on input of number of legs and stirrup size selected for the design.

Shear Stirrups

Reports the number of stirrups and associated spacing in each reinforcement zone along the beam or one-way slab. The total length is given for each reinforced zone.

To learn more about the graphical reporting of one-way shear results, view the video below:

Tags: ADAPT-Builder, ADAPT, Slab, New

May 26, 2020 | Time History, RISA-3D, New

Support Frame Structures for Rotating Machinery in RISA-3D

RISA-3D can be used to model the effects of rotating machinery on their support structures. In the model below, we have a structure which is to support a piece of rotating machinery. To begin, we will add the load at each node where the machinery will bear on the support beams. We have done this by using the Nodal Loads tool and changing the type to Load. In our example, 1000 lbs at four locations. Once the load is added, we need to simulate a rotation caused by the machinery at these four points. To accomplish this, a Time History function can be created that will simulate the operation frequency of our machinery. To do this, navigate to Advanced > Time History > Generate, where the frequency that will occur at each bearing point can be input. As shown below, we can modify the Time History function in order to simulate the start up and shut down of the machinery. For additional information on the Ramp Up and Coast Down sections of the time history function, check out the support article listed below: With the function created, the time history load is applied by opening the Time History Loads spreadsheet,…

March 12, 2021 | ADAPT, Concrete, New, ADAPT-PT-RC

ADAPT-PT/RC Version 20.0 is now available!

Updated Design Codes: ACI 318-19 ADAPT-PT/RC has been updated to include applicable provisions from ACI318-19: Building Code Requirements for Structural Concrete. The provisions in the latest design standard that have been included in ADAPT-PT/RC include but are not limited to: Reinforcement strain limit has been revised for all criteria and system types (beam, one-way and two-way slabs for RC and PT mode) according to Section 7.3.3.1. Minimum flexural reinforcement for non-prestressed, reinforced one and two-way slabs shall meet a minimum area of flexural reinforcement of 0.0018Ag according to Section 7.6.1.1. One-way shear strength provisions for non-prestressed members in relation with Vc for non-prestressed members have been modified per Table 22.5.5.1. The requirements for Av,min for non-prestressed and prestressed beams are given in Section 9.6.3.1 and 9.6.3.2. The provisions have changed from older version of the code. The program has been modified to include the provisions found below for non-prestressed beams. For two-way shear of slabs, a new size effect factor, lambda is introduced in the allowable concrete shear stress, Vc,without shear reinforcement. Table 22.6.5.2 now incorporates the size effect factor, lambda in equations (a), (b), and (c). Licensing ADAPT-PT/RC now supports cloud based licensing similar to other RISA software products…

November 24, 2020 | ADAPT-Builder, ADAPT, Slab, New

Moment Capacity of Slabs with Base Reinforcement

In this video, the calculated moment capacity of a slab with base reinforcement, as well as the cover requirements for base reinforcement are reviewed…